Navi Mumbai WWTP

Navi Mumbai Municipal Corporation Public Health Engineering Department Prequalification Booklet No.NMMC/ACE/32/2008-2009

Sell of Treated Sewage water from Sewage Treatment Plant based on C-Tech Technology at Sector 18, Vashi (100 MLD Capacity), Sector 50, Nerul (100 MLD Capacity) & Sector 18 Airoli (80 MLD Capacity).

Date of receipt

-- 16/09/2008 --

upto 14.30 Hrs.

Probable Date of Opening

-- 16/09/2008 --

at 16.00 hrs (if possible)

Booklet Price

-- 1,000/-

--

(Non- Refundable)

Office Additional City Engineer Navi Mumbai Municipal Corporation 8th floor, Belapur Bhavan, Sector 11,CBD- Belapur, Navi Mumbai – 400 614

Signature of applicant with seal

Navi Mumbai Municipal Corporation Public Health Engineering Department Name of work :-


Rs. 1,000/- (Non-Refundable) Issued To M/s. ------------------------------------------------------------------------------------------------------Last Date & Time for Submission

: 16/09/2008 upto 14.30

CONTENTS Sr.No. 1. 2. 3. 4 5. 6. 7. 8. 9.

Title

Page No.

Introduction Information & Instructions to Applicants Criteria for prequalification General Information Technical details of Sewage Treatment Plants Based on C-Tech Technology Technology & Design Design raw sewage quality & Outlet parameters. Profile of the Applicant Annexure - 1 to 5

From 3 5 10 12 14

To 4 9 11 13 14

15 24 25 26

23 24 25 30

Receipt No. --------------Date :- ---------------------

Additional City Engineer, Navi Mumbai Municipal Corporation


…1… NAVI MUMBAI MUNICIPAL CORPORATION PUBLIC HEALTH ENGINEERING DEPARTMENT

Prequalification Notice No./ACE/32/2008-2009 Navi Mumbai Municipal Corporation has constructed S.T.P.`s based on C-Tech Technology at Vashi, Nerul & Airoli. B.O.D. of treated Sewage Water from these S.T.P.`s shall be 5 P.P.M. Treated Sewage water can be used for industrial use, Agricultural purpose & other use (expect drinking). Navi Mumbai Municipal Corporation invites Prequalification application for sell of treated sewage water from STP`s mentioned below. Sr.No. 1.

Name of Work Sell of Treated Sewage water from Sewage Treatment Plant based on C-Tech Technology at Sector 18, Vashi (100 MLD Capacity), Sector 50, Nerul (100 MLD Capacity) & Sector 18 Airoli (80 MLD Capacity).

The prequalification proforma booklet will be available from Navi Mumbai Municipal Corporation reception office, Ground Floor, Belapur Bhavan, C.B.D., Belapur, Navi Mumbai on all working days (expect Sunday & Public holidays as declared by Government of Maharashtra) during the working hours upto 13.00 hrs. from date of publication till dt. 16/09/2008 on payment of Rs. 1,000/- for each prequalification booklet. The same can also be downloaded from the official website of NMMC (www.nmmconline.com). While submitting the filled prequalification booklet downloaded from the website the same shall be accompanied by a demand draft / Pay order of Rs. 1,000/- towards the cost of prequalification booklet in favour of Navi Mumbai Municipal Corporation. The Sealed and completely filled prequalification booklet duly signed on each paper (along with certificated & documents) should be submitted in the tender boxes available at different designated places in NMMC office mentioned in prequalification booklet. Prequalification booklet will be accepted on or before dt. 16/09/2008 up to 14.30 pm. Booklet submitted through post or private courier within due date of submission will also be accepted. Hon`ble Commissioner, Navi Mumbai Municipal Corporation reserves the rights to deny prequalification to any or all applicants without assigning any reason and no correspondence from intending parties shall be entertained. Please note that the incomplete application or the application received without detailed information mentioned in proforma or applications received after the due date of submission will be summarily rejected.

Additional City Engineer, Navi Mumbai Municipal Corporation


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1.

INTRODUCTION

A. Navi Mumbai has been developed as an independent, totally planned and fully self-contained metro city. Navi Mumbai is therefore one of the planned and modern city. The Navi Mumbai Municipal Corporation was established in 1992, having an area of 108 Sq.Km. and functions w.r.t.. BPMC Act 1949 and MRTP Act 1966. The population of the city as per the census 1991 was 3,97,000 which has increased to 7,50,000 as indicated in the census figures in 2001 (a rise of 88.91%).. As per the Development Plan, the various Infrastructure facilities are existing and also under improvement / implementation. A1

The Navi Mumbai Municipal Corporation (NMMC) has constructed and commissioned a state of art Sewage Treatment Plant (STP) based on C-Tech Technology at Sector 18, Vashi (Capacity of 100MLD), Sector 50, Nerul (Capacity of 100MLD) & Sector 18 Airoli (Capacity of 80MLD), Navi Mumbai.

A2

NMMC intends to prequalify applicants for sale of treated sewage water including Operation and Maintenance for 28 years of these S.T.P.`s. SCOPE OF WORK

(I)

The Successful bidder shall carry out Operation and Maintenance of above C-Tech based STPs for 28 years in accordance with good Operating Practices as set out in the contract. Bidder has to bear all necessary charges for operation and maintenance including electrical charges.

(II)

To Sell the treated sewage water from these above mentioned S.T.P.`s. The bidder may be permitted to provide a further additional treatment, storage and infrastructure within earmarked premises of these S.T.P.`s on his own cost after taking required permission and approvals from authority.

(III) To pay NMMC the agreed amount quoted by successful bidder as per the terms and Condition of financial bid.


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1.1. Interpretation and Definitions

1.

“Corporation” shall mean Navi Mumbai Municipal Corporation as incorporated under the BPMC Act 1949 which shall also be represented as NMMC.

2.

The “Municipal Commissioner” shall mean The Municipal Commissioner of the Corporation for time being holding that office and also his successor and shall include any officer authorized by him.

3.

The “Engineer” shall mean the Additional City Engineer of the Corporation or whomsoever may be authorized by the Commissioner to carry out the functions of the Engineer.

4.

The “applicant” means the agency submitting the application as per this brochure and subsequently the agency to whom the Contract shall be awarded.

5.

“Prequalification Document” means this document containing the information in respect of the expected contract work.

6.

Singular /Plural: Singular shall have the same force and meaning as plural and viz-a-viz as per the context.

7.

Gender: Masculine shall have the same force and meaning as other gender and viz-a-viz as per the context.


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2.0. INFORMATION AND INSTRUCTIONS TO APPLICANTS 2.1.

GENERAL

a. All information requested, should be furnished against the respective columns in the format enclosed in this document. If information is furnished in separate documents, reference thereto should be given against respective columns. If information is ‘NIL’ it should also be mentioned as ‘Nil ‘or ‘No such case ‘. If any particular query is not applicable in case of the applicant, it should be stated as ‘Not applicable’. The applicants are cautioned that non-submission of complete information called for in the required formats, or making any change in the prescribed forms may result in the application being summarily rejected. b. All the information must be submitted in English. c. The application should be typewritten. The applicant’s name should appear on each page of the application form. d. Overwriting shall be avoided. Corrections, if any, shall be made by crossing out, initiating, dating and rewriting. All pages of the application shall be numbered and submitted as a package with signed letter of transmittal. e. References, information and certificates from the respective clients certifying suitability, technical know-how. f. The Applicant is advised to attach any additional information, which he thinks to be necessary in regard to his capabilities. No further information will be entertained after submission of application unless the Corporation calls for it.. The Corporation reserves the right to call for additional information & clarification of information submitted from the Applicants. g. Applications are invited for complete work as outlined in brief in Scope of work. The application form duly completed and signed, shall be submitted in sealed cover. The sealed cover super scribed as prequalification Application to Sell of Treated Sewage water from Sewage Treatment Plant based on C-Tech Technology at Sector 18, Vashi (100 MLD Capacity), Sector 50, Nerul (100 MLD Capacity) & Sector 18 Airoli (80 MLD Capacity) will be received on or before 16/09/2008 upto 14.30 hrs in the below mentioned locations. The complete prequalification document in the manner specified in the following paragraph will be received in the following offices Place of receipt of Tender a)

1st

floor, at Entrance lobby, Belapur Bhavan, Sector 11, CBD Belapur.

b) Hon. Commissioner’s Office, 1 st floor, Belapur Bhavan, Sector 11, CBD Belapur. c) Medical Health Officer’s Office , 8 th floor, Belapur Bhavan Sector 11, CBD Belapur. By courier or by mail within specified times as indicated above..


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2.2.

SITE VISIT The applicant is advised to visit and examine the site of the works and its surrounding and obtain himself at his responsibility all information such as availability of labour, basic materials, water, electricity etc. A declaration to this effect will have to be signed by the applicant in the form attached to the prequalification document.

2.3

PRE-SUBMISSION CONFERENCE There will be no pre-submission conference as such, however prospective bidders are free to ask for any additional information or clarification in writing only within 20 days from notification of this proposal.. NMMC is not obliged to respond to such queries, but will try to answer them on a best effort basis.

2.4

CLARIFICATION OF DOCUMENTS To assist in examination, evaluation of documents, NMMC may ask applicants individually for clarification of their information furnished. Such request shall be in writing and the response shall also be in writing.

2.5

LATE SUBMISSION OF APPLICATION Applications received after due date will not be accepted.

2.6

FINAL DECISION MAKING AUTHORITY Municipal Commissioner ( NMMC) reserves the right to accept or reject any application and to annul the process and reject all applications at any time without assigning any reason and without thereby incurring any liability to the effected applicant or without informing the applicants of the grounds for the action.

2.7

METHOD OF SUBMISSION 1)

All the envelopes shall be placed in a COMMON ENVELOPE marked COMMON ENVELOPE.

2)

The COMMON ENVELOPE shall be addressed to Additional City Engineer, Navi Mumbai Municipal Corporation and shall be super scribed name of work and the name and address of the applicant.


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The applicant shall submit the application as below:Envelope - I 1) Original Receipt of cost of prequalification document of Rs. 1,000/- or pay order / DD for Rs. 1,000/- in favour of Navi Mumbai Municipal Corporation if the PQ documents were downloaded from the website (www.nmmconline.com) 2) Copy of Certificate of Incorporation, Memorandum of Association and Articles of Association, certified by a Director of the Bidder Company. 3) A power of attorney, duly notarized and on a stamp paper of an appropriate value, issued and signed by the applicant, in favour of a specified person to act as the official representative of the applicant. for the purpose of signing the bid documents, making Corrections /modifications and interacting with NMMC and acting as the contact person. 4) Copies of Audited Annual Financial Statements for the last three financial years, duly certified by a Director of the applicant. (i.e. from 1st April 2005 to 31st March 2006, 1st April 2006 to 31st March 2007, 1st April 2007 to 31st March 2008, ) 5) Copies of Net worth (Sum of paid up share capital and free reserves) duly certified by Director of applicant agency) 6) Copy of resolution from board of director for authorization for issuing power of attorney. If any of the above documents are not available in envelope No. 1 then the application will be summarily rejected. Envelope - II 1) The Original prequalification document duly signed in each page shall be submitted in the sealed envelope marked original prequalification document alongwith document specified in the prequalification document for prequalification. 2.8

DOCUMENTS OPENING AND EVALUATION The envelopes submitted by the applicants will be opened in the presence of applicants / their authorized representative who choose to remain present at the time and date & the venue specified. The probable date and time of opening is 16/09/2008 at 16:00 hrs. (if possible) at Additional City Engineer’s office Navi Mumbai Municipal Corporation, 8th floor, Belapur Bhavan, CBD Belapur, Navi Mumbai. Following procedure shall be adopted for opening of the envelopes submitted by the applicants. First of all information about number of applicants will be announced. Envelope of each applicant will be then opened serially. Documents in the envelope will be verified by the authority to check their validity as per requirement. If any particular document of any applicant is either missing or does not meet the requirements specified then a note to that effect will be recorded by the authority.


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2.9

PROCESS TO BE CONFIDENTIAL After opening of the application Forms publicly, information relating to the examination, clarification evaluation and comparison of applicants and recommendations concerning the selection of eligible applicant shall not be disclosed to the applicants or others person not officially concerned with such process until the list of eligible applicants have been announced. Any effort by an applicant to influence the NMMC in progress of examination, clarification, evaluation, and comparison of prequalification documents and in decision concerning the prequalification may result in rejection of the application. Detailed technical information about the plant and the treatment process is provided in Appendix 1

B

BASIC QUALIFICATIONS APPLICANTS.

AND

REQUIREMENTS

EXPECTED

FROM

THE

Applicants interested in participating in the process should meet the following requirements: B1

INDIVIDUAL APPLICANT (BIDDER) The applicant should be an individual corporate, bidding on its own. Consortium /Joint Venture will not be considered. The individual applicant shall be a corporate body registered under Companies Act 1956 of India or equivalent laws in case of foreign applicant.

B2

FINANCIAL CRITERIA & EXPERIENCE Financial Criteria & experience as mentioned at tabular format 3.0 (A)

B3.

EVALUATION OF APPLICANT (BIDDER) i) Based on the information submitted by applicant, NMMC will carry out an evaluation of the prequalification document of the applicants and will subsequently notify in writing those applicants who qualify to participate in the next stage of the process. ii) The evaluation of the applicant will be based on the criteria for prequalification mentioned at 3.00(A). Those applicants who score minimum 65 & above marks based on the criteria, will be invited to participate in the second stage of the financial bidding process. iii) The list of prequalified applicants will be displayed only on the NMMC notice board at Belapur, Bhavan, C.B.D. Belapur, Navi Mumbai.


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C

OVERVIEW OF APPLICATION PROCESS A two stage selection procedure will be adopted consisting of a Prequalification (Stage 1) and Financial bid (Stage 2). The purpose of the Prequalification is to shortlist competent applicants who have the necessary technical and financial expertise to undertake the responsibilities that would be assigned to the successful bidder under a contract. Only those Bidders, who qualify in the Prequalification evaluation process, will be allowed to participate in the Financial Bid (Stage2). The Financial Bid document will be circulated to the short listed Bidders from Stage 1 and such short listed Bidders will submit the Financial Bid as per requirements therein. Prequalify applicants will be disqualified by NMMC in case of incomplete or non-responsive applications or if the information is not submitted in the required formats. NMMC Commissioner reserves the right to accept or reject any or all applications without assigning any reason whatsoever.


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3.0(A)

CRITERIA FOR PREQUALIFICATION

Sr. No.

1.

2.

Category

Criteria

Previous Experience of completion of Infrastructure Projects in water/wastewater/solid waste treatment and disposal in India in association with any Government entities on PPP Basis, in which the bidder has fully invested at least 26% equity (minimum project value Rs. 25 crores). The investment by the bidder may have been made directly and /or by companies in which the bidder holds at least 26% equity.(Attach attested copy of completion certificate issued by an officer not below the rank of Executive Engineer or by Director of client/project company). (For conformation of 26% equity a certificate from the Director of company & statutory auditor & also proof from registar of companies shall be submitted.) (As per Annexure 3) Previous Experience of having constructed and/or operated and maintained water/waste water treatment plants of minimum 50 MLD capacity in India in the last five years for a Government entity. The execution by the Bidder may have been done directly and /or by companies in which the Bidder holds at least 26% equity. (Attach attested copy of certificate issued by an officer not below the rank of Executive Engineer or by Director of client/project company). (For conformation of 26% equity a certificate from the Director of company & statutory auditor & also proof from registar of companies shall be submitted.) (As per Annexure 4)

Project Value of minimum Rs. 25 Crores & up to and including Rs. 250 Crores Above Rs. 250 Crores


Each project

Maximum score where the Bidder has more than one project

5

10

Maximum score for the category

20

Plant size of 50mld up to and including 100 mld Above 100 mld up to and including 150 mld Above 150 mld

15

20

5

10

10

15

15

20

20

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Sr. No.

3.

4.

5.

Category

Criteria

Previous Experience in achieving financial closure for water/waste water/solid waste treatment and disposal projects in India on PPP basis. (Attach certificates from client / lead banker, in support of achieving financial closure. It should be authenticated by a Director on the board of the client company ( in case of a limited company) or by a Gazetted officer / Director in case of a Government entity or an officer not below the rank of Deputy General Manager of the Lead Bank). (For conformation of 26% equity a certificate from the Director of company & statutory auditor & also proof from registar of companies shall be submitted.) (As per Annexure 5) Net worth of the Company as on 31 March 2008. (Attach attested audited copy, signed by Director & Statutory Auditor of Company)

Project Value of minimum Rs. 25 Crores & up to and including Rs. 250 Crores Above Rs. 250 Crores

Above Rs. 50 Crores & up to and including Rs. 100 Crores Above Rs 100 crores Average Turnover of the Company for the last three Above Rs. 100 financial years. ie, April 1st 2005 to March 31st Crores & up to including 2006; April 1st 2006 to March 31st 2007; and April and st st Rs. 200 Crores 1 2007 to March 31 2008; subject to the

turnover being not less than Rs 75 crores in Above Rs. 200 any of the three financial years. (Attach Crores

attested audited copy, signed by Director & Statutory Auditor of Company) Total


Each project

Maximum score where the Bidder has more than one project

5

10

Maximum score for the category

20

15

20

--

10 20

--

20 10

20

--

--

20 100

…12… B.

FINANCIAL BID Only the prequalified applicants will be considered for issue blank Tender Documents (Bid Document).

C.

COST OF PREPARING THE APPLICATION. The applicant shall bear all costs associated with the preparation and submission of the prequalification document and NMMC will in no case be responsible or liable for these costs , regardless of the conduct or outcome of the selection process. The applicant is advised to carry out necessary technical surveys, field investigations, site visits, etc at its own cost and risk, before submitting the Bid.

D.

LANGUAGE OF THE PREQUALIFICATION DOCUMENT The prequalification documents, and all correspondence and documents related to the prequalification exchanged by the applicant and NMMC, shall be written in the English language. Supporting documents and printed literature furnished by the applicant may be in another language provided they are accompanied by an accurate English translation of the relevant passages, in which case, for purposes of interpretation of the prequalification document, the English translation shall prevail. Any material that is submitted in a language other than English, and which is not translated into English, will not be considered.

E.

FORMAT AND SIGNING OF THE PREQUALIFICATION DOCUMENT The applicant shall prepare and submit only one copy of the application and shall mark the envelopes. The Prequlification document shall be typed and shall be signed by the applicant or a person or persons duly authorized to bind the applicant to the contract. The person or persons signing the application shall initial all pages of the prequalification document, except for unamended printed literature Any interlineations, erasures or overwriting shall only be valid if the person or persons signing the document initial them

F.

CONTACT ADDRESS

Additional City Engineer, Navi Mumbai Municipal Corporation, 8th Floor, Belapur Bhavan, Sector 11, C.B.D., Belapur, Navi Mumbai 400 614. G.

RELATIONSHIP WITH CORPORATORS The applicant shall not be associated presently or in the past with any of the office bearers of Navi Mumbai Municipal Corporation , either directly or indirectly as specified in the section 10(f), (g), of BPMC Act,1949. The applicant shall furnish an affidavit on a Non-Judicial stamp paper of Rs 100/-. If any information so furnished shall be found to be untrue or false, the applicant shall be liable to be disqualified and the Earnest Money paid by such applicant shall stand forfeited to the Corporation. If the information so furnished shall be found to be untrue or false during the currency of the contract, the applicant shall be held to be in default and the Contract, if any awarded to it, shall be liable to be terminated with its consequences.


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H.

PROCESS TO BE CONFIDENTIAL Information relating to the examination, clarification, evaluation and comparison of Prequalifications and the award of a Contract shall not be disclosed to applicants or any other person not officially concerned with such process.

I

CORRUPT OR FRAUDULENT PRACTICES NMMC requires that the applicant under this prequalification observes the highest standards of ethics during the entire process. In pursuance of this policy, the Corporation defines for the purposes of this provision, the terms set forth as follows: “Corrupt practice” means the offering, giving, receiving or soliciting of any thing of value to influence the action of the public official in the procurement process or in contract execution; and “Fraudulent practice” means a misrepresentation of facts in order to influence a procurement process or an execution of a contract to the detriment of the Corporation, and includes collusive practice among applicants (prior to or after submission) designed to establish artificial non-competitive levels and to deprive the Corporation of the benefits of free and open competition.


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Appendix 1: TECHNICAL DETAILS OF SEWAGE TREATMENT PLANTS BASED ON C-TECH TECHNOLOGY

o Name of the plant, location and capacity Name of Plant

Location

Design Capacity

Aprox. Flow

Vashi

Sec 18, Vashi, Navi Mumbai.

100 Mld

38 MLD

Nerul

Sec 50, Nerul, Navi Mumbai.

100 Mld

35 MLD

Airoli

Sec 18, Airoli, Navi Mumbai.

80 Mld

30 MLD

Above Plants are designed for 100MLD Capacity at Vashi, 100MLD Capacity at Nerul & 80 MLD Capacity at Airoli considering next 25 years sewage flow which will be expected in subsequent years.


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I. Technology & Design a) Treatment Philosophy: Raw sewage after primary treatment comprising of Bar screen and Grit chamber is taken by gravity into the C-Tech Basins. These C-Tech basins work in sequence and the influent flow is distributed using Automatic Gates provided in the Inlet Chamber of C-Tech basins. The C-Tech basins are equipped with air blowers, diffusers, Return Activated Sludge (RAS) pumps, Surplus Activated Sludge (SAS) pumps, Decanters, Auto valves, PLC etc. All cycles will be automatically controlled using PLC.

Excess sludge at a consistency level of approx 0.8% will be pumped intermittently from SAS pump. The sludge is taken for dewatering. The treated effluent from the C-Tech Basins will be collected in the Chlorination tank where it is chlorinated before being discharged. b) Process Chemistry: Removal of Organics The raw sewage free from debris and grit shall be taken up for Biological treatment for the removal of organics, nitrogen and phosphorus. The activated sludge bio system is designed using Cyclic Activated Sludge Technology which operates on extended aeration activated sludge principle for the reduction of carbonaceous BOD, Nitrification, Denitrification as well as phosphorous removal, using energy efficient fine bubble membrane diffused aeration system, with automatic control of oxygen uptake rate, resulting in 20 – 30% power savings. The practice of manipulating activated sludge reaction environments to obtain maximum nitrogen and phosphorous removal has been optimized, using cyclic activated sludge technology, by co-current nitrification denitrification mechanism. In its simplest form, the sequences of fill, aeration, settle and decant are consecutively and continuously operated all in the same tank, allowing up to 30-40% space saving. No secondary clarifier system is required to concentrate the sludge in the reactor. The return sludge is recycled and the surplus sludge is wasted from the C-Tech basin itself. The system makes use of the variable volume treatment in combination with a biological Selector and operated in a fed-batch reactor mode. The complete biological operation is divided into cycles. A basic cycle comprises: •

Fill – Aeration

•

Settlement

•

Decanting


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These phases in a sequence constitute a cycle, which is then repeated. During the period of a cycle, the liquid volume inside the Reactor increases from a set operating bottom water level. During the Fill- Aeration sequence mixed liquor from the aeration zone is recycled into the Selector. Aeration ends at a predetermined period of the cycle to allow the biomass to flocculate and settle under quiescent conditions. After a specific settling period, the treated supernatant is decanted, using a moving weir Decanter. The liquid level in the Reactor is so returned to the bottom water level after which the cycle is repeated. Solids are wasted from the Reactor during the decanting phase. The system selected is capable of achieving the following: i) Anoxic denitrification of nitrates in the Biological Selector zone of C-Tech (Anoxic Zone) using incoming wastewater ii) Bio-degradation of organics including phenol present in the wastewater by Extended Aeration Process iii) Oxidation of sulphides in the wastewater iv) Co-current nitrification and denitrification of ammoniacal nitrogen in the aeration zone of C-Tech basin. v) Removal of phosphorous Denitrification The wastewater enters the Selector zone in the front end of the C-Tech, where anoxic conditions are maintained. Part of the treated wastewater along with return sludge from the aeration basin is recycled here, using RAS Pumps. With the incorporation of biological Selector there is no need for an Anoxic – Mixing sequence and is therefore replaced by a simple Fill – Aeration sequence. As the microorganisms meet high BOD, low DO condition in the Selector zone, natural selection of phosphate accumulating microorganisms and floc-forming microorganisms takes place. This is very effective in containing all of the known low F/M bulking microorganisms and eliminates the problems of bulking and surface foaming. Also, due to the anoxic conditions in the Selector zone, denitrification and phosphorous removal occurs by co-current nitrification & Denitrification. Complete nitrification and denitrification pathways take place with nitrification taking place external to the activated sludge flocs and denitrification taking place within the interior of the flocs. This denitrification pathway is not bound to the absence of dissolved oxygen in the liquid phase but requires diffusion of nitrate into the anoxic parts of the floc with a probable use of stored intracellular carbon or adsorbed organic carbon for denitrification. During anaerobic conditions, all phosphorous that is released to the liquid phase is totally contained within the bio solids layer.


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Biological denitrification in the Selector zone by recycling of mixed liquor from aeration zone requires nitrification of all ammoniacal nitrogen in the incoming wastewater in the aeration zone. This requirement of plant design is met by operating the C-tech under Extended Aeration Process with higher θc values, which ensure co-current nitrification and denitrification in the aeration zone. Denitrification releases nitrogen which escapes as an inert gas to the atmospheres, while the oxygen released stays dissolved in the liquid and thus reduces the oxygen input needed for the aeration. The process of denitrification of nitrates is represented as: NO3- + BOD Æ N2 + CO2 + H2O + OH- + cells. Carbonaceous BOD removal The aeration zone of C-Tech is provided with diffused aeration to oxidize the organic matter including phenol, by Extended Aeration Process. An extended aeration activated sludge process operates in the endogenous respiration phase of the growth curve where the microorganisms are forced to metabolize their own protoplasm without replacement, since the concentration of food available is at a minimum. During this phase, the nutrients remaining in the dead cells diffuse out to furnish the remaining cells with food. This system has been developed for application where minimum solids production is desirable. Less solids production is achieved by using a larger fraction of the entering organic material for energy rather than for synthesis. This means that more oxygen will be consumed per unit mass of organic material removed. The activated sludge process is capable of converting most organic wastes to more stable inorganic forms or to cellular mass. In this process, the soluble and colloidal organic material is metabolized by a diverse group of microorganisms to carbon dioxide and water. At the same time, a sizeable fraction of incoming organic matter is converted to cellular mass that can be separated from the effluent by settling. Activated sludge comprises a mixed microbial culture wherein the bacteria are responsible for oxidizing the organic matter, while protozoa consume the dispersed un-flocculated bacteria and rotifers consume the unsettled small bio-flocs in the treated wastewater, performing the role of effluent polishers. The utilization of substrate by a bacterial cell can be described as a three-step process: i) The substrate molecule contacts the cell wall. ii) The substrate molecule is transported into the cell iii) Metabolism of the substrate molecule by the cell


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However, as the bacteria require the molecule in the soluble form, colloidal, spherically incompatible molecules, which cannot be readily biodegradable, have to be first adsorbed to the cell surface and then broken down or transformed externally to transportable fractions by exo-enzymes or wall-bounded enzymes. The organic matter will be utilized by the bacteria resulting in cell synthesis and energy for maintenance. The following reactions best describe the organic utilization by the aerobic bacteria: i) Oxidation COHNS + O2 + Bacteria Æ CO2 + NH3 + other End Products + Energy ii) Synthesis COHNS + O2 + Bacteria Æ C5H7O2N (New Bacterial Cell) iii) Endogenous Respiration C5H7O2N + 5O2 Æ 5CO2 + NH3 + 2H2O + Energy Nutrients available in the wastewater or from external source of supplements cater to the nutrient requirements of the aerobic microorganisms and to enhance the activity of the aerobic microbes. In addition to the nutrient requirements, the aerobic microbes require oxygen to sustain their microbial activity. Oxygen also functions as a terminal electron acceptor in the energy metabolism of the aerobic heterotrophic organisms indigenous to the activated sludge process. In other words a portion of the organic material removed is oxidized to provide energy for the maintenance function and the synthesis function.


…19…

Nitrification Any oxidation must be coupled with reduction, and oxygen satisfies this requirement in the aerobic microorganisms. Extended Aeration system, with high θc values, ensures uniform nitrification performance. Nitrification results from the oxidation of ammonia present in the sewage by Nitrosomanas to nitrite and the subsequent oxidation of the nitrite to nitrate by Nitrobacter. The nitrifying organisms are strict aerobic autotrophes and use carbon source present in the sewage, in the presence of oxygen, maintained at 2 mg/l in the C-Tech to avoid oxygen limitation. The nitrification of ammonia can be represented as given below: NITROSOMONAS

2 NH4+ + 3O2

2 NO2- + O2

2NO2- + 2 H2O + 4 H+ + New Cells

NITROBACTOR

2NO3- + New Cells

The diffused aeration system is sized so that sufficient oxygen is provided for carbonaceous treatment, sludge stabilization, nitrification and maintaining the DO at the specified level of 2 mg/l, taking into account the reduction in oxygen demand due to denitrification. The capacity of diffused aeration in each C-Tech basin will be sufficient to ensure good mixing conditions during Fill Aeration phase of the cycle of operation. Phosphorous removal The removal of phosphorous from the wastewater is accomplished by the consumption of P for the cell growth. During anoxic conditions, all phosphorous that is released to the liquid phase is totally contained within the bio solids layer. c) Process Description: The C-TECH system is operated in a batch reactor mode, which eliminates all the inefficiencies of the continuous processes. A batch reactor is a perfect reactor, which ensures 100% treatment. Six modules are provided to ensure continuous treatment. The complete process takes place in a single reactor, within which all biological treatment steps take place sequentially. No additional settling unit / secondary clarifier are required The complete biological operation is divided into cycles. Each cycle is of 3 – 5 hrs duration (3 hours as design basis); during which all treatment steps take place.


…20…

Explanation of cyclic operation: A basic cycle comprises: • Fill-Aeration

(F/A)

• Settlement

(S)

• Decanting

(D)

These phases in a sequence constitute a cycle, which is then repeated. A Typical Cycle During the period of a cycle, the liquid is filled in the C Tech Basin up to a set operating water level. Aeration Blowers are started for aeration of the effluent. After the aeration cycle, the biomass settles under perfect settling conditions. Once Settled the supernatant is removed from the top using a DECANTER. Solids are wasted from the tanks during the decanting phase. These phases in a sequence constitute a cycle, which is then repeated.

Fig. 1 A Typical C Tech Cycle


…21…

C Tech Components: The C Tech system comprises the following features, i) Biological Selector zone Ensures no foaming and bulking problems ii) Dissolved Oxygen Control to automatically control and optimise consumption.

power

Ensures 20 - 30% power savings. DECANTER

SELECTOR

INLET

OUTLET

AERATION GRID RAS/SAS PUMPS

iii) Co Current Nitrification and De nitrification, Phosphorous removal Provides Nitrogen and Phosphorous removal to remove nutrients making the water safe for water discharge iv) Decanter assembly in Stainless steel equipped with VFD to automatically control rate of decanting based on input feed condition. Ensures no corrosion, long equipment life, no maintenance v) Diffusers for Aeration Highest aeration and oxygen transfer efficiency


…22… vi) Return sludge (RAS) recycle and Surplus sludge (SAS) pumps for sludge wasting from reactor only. Reduces space requirement. No secondary clarifier is used which drastically reduces civil cost and construction cost vii)

PLC unit for complete automatic cycle control and operation

Reduces manpower cost. Complete operation can be hooked to central control desk d)

Biological SELECTOR zone The incorporation of a biological SELECTOR in the front end of the C-TECH- Systems distinguishes it from all other technologies. The raw effluent enters the SELECTOR zone, where ANOXIC MIX conditions are maintained. Part of the treated effluent along with return sludge from the aeration basin is recycled in here, using RAS pumps. As the microorganisms meet high BOD, low DO condition in the SELECTOR, natural selection of predominantly floc-forming microorganisms takes place. This is very effective in containing all of the known low F/M bulking microorganisms, eliminates problems of bulking and sludge foaming. This process ensures excellent settling characteristics of the bio sludge. SVI of treated effluent of less than 120 is achieved in all seasons. Also due to the anoxic conditions in the SELECTOR zone, De nitrification and phosphorous removal occurs in case the Ammonical nitrogen and phosphorous levels are high in the effluent. The figure below shows the experience with SVI developments in parallel operations with a wastewater that traditionally favours sludge

Fig: Comparison of the SVI of a conventional AS plant & a C-TECH plant at parallel operation (Grossarl WWTP)


…23…

e)

Dissolved Oxygen Control The C Tech process uses measurement of dissolved oxygen (DO) levels in the basin to enhance treatment efficiency and optimise power consumption. The DO concentration in the basin is continuously monitored using a DO sensor. Once DO level is measured in the basins, a variable frequency drive automatically alters the aeration blower rpm to maintain desired DO levels in the basin. This methodology provides a true in-basin method for the efficient use of energy.

f) `

Decanter Assembly The clean supernatant is removed from the basin using a Decanter assembly complete in stainless steel construction. During decanting there is no inflow to the basin. The moving weir DECANTER is motor driven and travels slowly from its “park” position to a designated bottom water level. Once the Decanting phase sets in, the decanter automatically lowers to the required bottom level. Variable frequency drives are provided to control the rate of movement of the Decanters. After the required level of supernatant is removed the Decanter is returned to its “park” position through reversal of the drive. The basin is now ready for the next cycle to begin.

Fig.: DECANTER of the C-TECH process g)

Operational Simplicity - Fully PLC based intelligent control The complete CTech plant operation is controlled automatically thro a PLC system, which is a major factor in reducing operating costs. This also prevents mal operation of the various set process parameters within the plant. All key functions like, RAS, sludge wasting, aeration intensity, cycle time control, decanting rate etc are automatically controlled as well as data logged. Complete historical records of plant operation are available on touch of a button.


…24…

Design Raw Sewage Quality & Outlet Parameters o Details of inlet sewage quality parameters I) Inlet Parameters S. No. Parameters Inlet Units 1. Biochemical Oxygen Demand (BOD5) 250 mg/l 2. Chemical Oxygen Demand (COD) 400 mg/l 3. Total Suspended Solids 200 mg/l 4. Total Kjeldhal Nitrogen (as N) 45 mg/l 5. Ammonia Nitrogen (as N) 10 mg/l 6. Total Phosphorus (as PO4) 5 mg/l 7. Sulfates 120 mg/l 6 8. Fecal Coliforms 10 Nos./100ml 9. Total Coliforms0 107 Nos./100ml 10. Chlorides 265 mg/l 11. pH 5.5 - 9 12. Oil & Grease 15 mg/l The above inlet sewage water quality parameters will vary depending on the season, water supply and consumption pattern. II) Outlet Parameters S. No. Parameters Biochemical Oxygen Demand 1. (as BOD5) 2. Total Suspended Solids 3. COD 4. PH 5. Oil & Grease 6. Ammoniacal Nitrogen 7. Nitrate Nitrogen 8. Total Phosphorous 9. Fecal Coliforms


Values 5 or less mg/l 10 or less mg/l Less than or equal to 100 mg/l 7-9 Less than or equal to 5 mg/l Less than or equal to 2 mg/l Less than or equal to 10 mg/l Less than or equal to 2 mg/l Less than or equal to 100 Nos./100 ml

…25…

Form PROFILE OF THE APPLICANT 1.

Name of the Applicant

2.

Nature of constitution of the organisation

3.

Date of establishment / incorporation as entity

4.

Place and country where registered / incorporated

5.

Address of Registered Office of the applicant

6.

Address for communications

7.

Names of the Senior Executive Personnel like Chairman/Managing Director/Chief Executive Officer.

8.

Major Business activities

9.

Average annual turnover for the last three financial years (Apr 2005 – Mar 2006; April 2006 – Mar 2007; April 2007 - Mar 2008)

10.

Net worth as on March 31, 2008


…26…

Annexure 1 UNDERTAKING OF APPLICANT (On a Rs. 100/- Stamp paper) The information / documents submitted by us are true to our knowledge and if the information / documents so furnished shall be found to be untrue or false, the Tender shall be liable to be disqualified and our Earnest Money accompanying Tender will be forfeited. Also I/We Also I/We aware that if the information / document found to be untrue or false during the currency of Contract, our Contract is liable to be terminated. .................................................... I / We hereby declare that I / We have made myself / ourselves thoroughly conversant with the sub-soil conditions regarding all materials (such as stone, murum, sand, etc.) and labour of which I / We have based my / our rates for this Work. The specifications, conditions bore results and lead of materials on this Work have been carefully studied and understood by me / us before submitting this Tender. I / We undertake to use only the best materials approved by the, Additional City Engineer, N.M.M.C. or his duly authorised assistant, before starting the Work and to abide by his decision. I/ we agree that the amount of Earnest Money shall not bear interest and shall be liable to be forfeited to the corporation, should I/we fail to (i) Abide by the stipulation to keep the offer open for the period of 120 days from the date fixed for opening the same and thereafter until it is withdrawn by me/ us by notice in writing duly addressed to the authority opening the Tenders. (ii) Pay Security Deposit as specified in Schedule ‘A’ and within the time limit laid down in 24 of Detailed Tender Notice. The amount of earnest money may be adjusted towards the security deposit or refunded to me /us if so desired by me/us in writing, unless the same or any part thereof has been forfeit as aforesaid. Should this Tender be accepted I/ we hereby agree to abide by and fulfill all the terms and provisions of the conditions of contract annexed hereto so far as applicable and in default thereof to forfeited and pay to NMMC the sums of money mentioned in the said conditions. Demand draft No...............................Dated ...................... from the Nationalised/ Scheduled Bank at........................................................... in respect of the sum of *Rs................................................................... is herewith forwarded representing the Earnest Money (a) the full value of which is to be absolutely forfeited to N.M.M.C. should I/ we not deposit the full amount of security deposit specified in the Detailed Tender Notice. Tenderer ........................................................................................ Address ......................................................................................... ......................................................................................... Date the .............................. day of ......................... 20 (witness) ..............................................................................

Signature of Applicant (Bidder) Signature of Witness

Address ............................................................................................................... ............................................................................................................................


…27…

Annexure 2 AFFIDAVIT ON STAMP PAPER OF VALUE OF RS. 100/I/We hereby state that we are aware of the provisions of section 10 (1) 10 (f) & (g) of the BPMC Act. 1949 which are reproduced below, and solemnly state that we have no partnership or any share of the any Corporator of this Corporation in our company and are not associated presently or in the past with any of the office bearers or Corporator of the Navi Mumbai Municipal Corporation either directly or indirectly. Extract of sec10 BPM Act 10(1)

Subject to the Provision of Section 13” and 404, a person shall be disqualified for being elected and for being a counceller.

10(f) “Subject to the provisions of sub-section (2), has directly or indirectly, by himself or his partner any share or interest in any Contract or employment with, by or on behalf of the Corporation”. 10 (g) “Having been elected a councilor is retained or employed in any professional capacity either personally or in the name of a firm in which he is a partner or with whom he is engaged in a professional capacity in connection with any cause or proceeding in which the Corporation or the Commissioner or the Transport Manager is interested or concerned” We are aware that the above information if found to be untrue or false, we are liable to be disqualified and the Earnest Money accompanying the Tender shall stand forfeited to the Corporation. We are also aware that if the information produced above if found to be untrue or false during the currency of the Contract, we shall be held to be in default and the Contract, if any awarded to us, shall be liable to be terminated with all its concurrences. Tenderer ..................................................................................... Address ..................................................................................... ..................................................................................... Date the .............................. day of ......................... 20

Signature of Applicant (Bidder)

Witness ................................................................................... Address ................................................................................... …................................................................................ Date the ------------------------------ day of ------------------- 200


Signature of Witness

…28…

Annexure 3 Details of experience of completion of infrastructure projects in Water/Waste Water/Solid Waste Treatment & Disposal in India on PPP Basis S.No

Project Name

1.

2.

3.

4.

5.


Type of Project (BOT/ BOOT etc.)

Project Description

Location

Name of Organisation

Total Project Value

% equity by the bidder

…29…

Annexure 4 Details of experience of having constructed & or operated & maintained water/waste water treatment plants / projects implemented in India for Government entity. S.No

Project Name

1.

2.

3.

4.

5.


Type of Project (PPP/BOT/BOOT etc.)

Project Description

Location


Capacity (in MLD)

…30…

Annexure 5: Details of experience in achiving financial closure for water/ waste water/ solid waste treatment and disposal projects in India on PPP Basis S.No Project Name


1.

2.

3.

4.

5.


Type of Project (BOT/BOOT etc.)

Project Scope

Project Value

Role of the Bidder

Name of funding agency

Navi Mumbai WWTP

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