1 Salient features of Chennai City Chennai the

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Salient features of Chennai City Chennai, the capital of Tamil Nadu, is the fourth largest city in India The growth of the City started in 17 th Century. Organized water supply commenced in 1872 & protected water supply in 1914 Chennai City 1. Geographical Area : 426 Sq. Km 2. Latitude / Longitude : 13º 04’ Minutes North / 80º 15’ Minutes East 3. Population ; 6. 73 Million (2011) (Expanded Chennai) 4. Topography : Flat 5. Drainage : Adayar & Cooum Rivers 6. Average Rain fall : 1100 mm to 1300 mm per year 7. Temperature : 30º c to 40º c 8. Climate ; Tropical 9. Humidity : Vary between 65% and 80% 10. Water Supply Sources : Surface , ground water & Desal water 11. Present Supply Level : 831 Mld (City 751 mld + Others 80 mld) 12. Current Supply Rate : 145 lpcd ( Old City ) + 40 lpcd (Added areas)

Expanded Chennai City METROWATER Zone No. Map showing Expanded Chennai City Fifteen Zones & Divisions Old Chennai Corporation : 176 Sqkm Municipalities : 9 Town Panchayats : 8 Village Panchayats : 25 Name of the Zone No. of Division Numbers I Thiruvottiyur 14 1 to 14 II Manali 7 15 to 21 III Madhavaram 12 22 to 33 IV Tondiarpet 15 34 to 48 V Royapuram 15 49 to 63 VI Thiru-Vi-Ka. Nagar 15 64 to 78 VII Ambattur 15 79 to 93 VIII Anna Nagar 15 94 to 108 IX Teynampet 18 109 to 126 X Kodambakkam 16 127 to 142 XI Valasaravakkam 13 143 to 155 XII Alandur 14 156 to 169 XIII Adayar 13 170 to 182 Expanded Chennai Corporation : 426 sqkm XIV Perungudi 9 183 to 191 Population : 6. 8 million XV Sholinganallur 9 192 to 200

CMWSSB Growth Profile – Sewerage System Details 1978 Present No. of consumers 1, 14, 000 6, 11, 275 Length of sewer mains 1, 223 km 2, 677 km 58 nos. 255 nos. 3 nos. 12 nos. No. of Pumping Stations Sewage Treatment Plants S T P Capacity 57 MLD 727 MLD

Chennai City Sewerage System Comprehensive zonal sewerage system implemented in the year 1961 City divided into 5 zones Kodungaiyur - ZONE I & II Koyambedu - ZONE III Nesapakkam - ZONE IV Perungudi ZONE V - Sewage Pumping Stations : 255 Nos 5

SEWAGE TREATMENT PLANTS IN CHENNAI CITY Year of Operation Treatment capacity in MLD Kodungaiyur 1991 80 II Kodungaiyur 1989 80 3 II Kodungaiyur 2006 110 4 III Koyambedu 1978 34 5 III Koyambedu 2005 60 6 IV Nesapakkam 1974 23 7 IV Nesapakkam 2006 40 8 V Perungudi 2006 54 9 V Perungudi 2008 12 10 V Perungudi 2010 60 11 IV Nesapakkam 2014 54 12 III Koyambedu 2015 120 Sl. No. Zone 1 I 2 Location Overall Total 727 6

REUSE OF SECONDARY TREATED SEWAGE Ø From Kodungaiyur STP, the secondary treated effluent is being supplied to the following Industries at the rate of Rs. 18. 40 per kilo litre M/s Chennai Petroleum Corporation Ltd (CPCL) : 18. 00 MLD M/s Madras Fertilizer Ltd (MFL) : 10. 50 MLD M/s Manali Petro Chemicals (MPL) : 1. 50 MLD Total : 30. 00 MLD Ø Revenue of about Rs. 16 crore is being generated per year through the sale of secondary treated effluent to the industries. Ø About 3. 00 lakh litres per day of secondary treated effluent is supplied to the Chennai Municipal Corporation for watering of plants and lawns at public parks and traffic islands, at free of cost. Ø The 0. 5 MLD of secondary treated effluent supplied from Koyambedu STP to M/s. CMRL at the rate of Rs. 18. 40/KL 7

REUSE OF SECONDARY TREATED SEWAGE Ø The treated effluent for gardening purpose is being supplied from CMWSSB’s Perungudi Sewage Treatment Plant to TNRDC and PWD. Ø An amount of Rs. 100/- for 12 KL and Rs. 200/- for 24 KL is being collected by CMWSSB towards supply of treated effluent. Ø TNRDC is using the treated effluent for gardening the plant in the center meridian along OMR road, whereas PWD is utilizing the treated effluent for gardening purpose in Gandhi Mandapam. Ø At Perungudi approximately 8 trips of 24 KL treated effluent are supplied per day.

45 MLD TTRO PLANT AT KOYAMBEDU 9

WATER DEMAND ASSESSMENT Industrial Park 2014 -15 2019 -20 2029 -30 EXISTING MLD Irungattukottai 12. 00 12. 61 13. 24 Sriperumbudur 7. 51 11. 55 12. 42 Oragadam 9. 48 12. 98 13. 63 Pillaipakkam 3. 10 5. 55 5. 96 UPCOMING Vallam-Vadakal 1. 41 8. 46 9. 40 Vaipur- Mathur 0. 49 2. 91 3. 23 Total Demand 33. 99 54. 06 57. 88 % of TTRO Water 80% 80% TTRO water requirement 27. 19 43. 25 46. 30 Enroute industries (along NH-4) 2. 50 2. 75 13. 03 Total Demand of 59. 33 29. 69 46. 00 TTRO water

FUNDING PATTERN Ø The Government of Tamil Nadu has accorded Administrative Sanction at a cost of Rs. 394. 00 crores as per G. O. (Ms) No. 147, dt. 01. 12. 2014 for this project under AMRUT/TNIPP-I Funds which is as follows. Ø Ø Ø AMRUT (GOI) @ 33% - Rs 130. 02 cr GOTN @ 20% - Rs 78. 80 cr TNIPP -I - Rs 231. 50 cr An amount of Rs. 231. 50 crores have been sanctioned for transmission line under TNIPP-I Fund.

TTRO – Feed water Characteristics

PROCESS FLOW SCHEME From Existing STP EQUALIZATION TANK (1 NO. , TWIN COMP Inlet flow: 63. 40 MLD RAPID GRAVITY FILTERS (Total flow): 63. 40 MLD 6 NOS (5 W+1 S) 0. 264 MLD Cl. O 2 Dosing Sodium Hypo Chlorite Dosing From Chlorine Dioxide Generator BASKET STRAINERS 4 NOS (3 W+1 S) FILTERED WATER STORAGE TANK (1 NO. ) UF CEB TO DB TANK Fe. Cl 3 and HCL Dosing UF CIP SYSTEM UF PERMEATE TANK (1 NO. ) Backwash F low: 6. 672 MLD BACKWASH TANK Air Scouring blower ULTRAFILTRATION SKIDS 7 NOS (6 W+1 S) Inflow: 62. 928 MLD Outflow: 56. 25 MLD UF BW DOSING OF SMBS , CAUSTIC AND ANTISCLANAT MICRON CARTRIDGE FILTERS 4 NOS (3 W+1 S) Inflow: 56. 25 MLD From UF B/W AND CEB WASTE 6. 269 MLD RO CIP SYSTEM RGF B/W WASTE = 0. 876 Ml. D Cl. O 2 Dosing Acid Dosing Caustic Dosing Product water to M/s SIPCOT through M. S. Transmission pipeline DISPOSAL BLENDING TANK RO REJECT REVERSE OSMOSIS SKIDS 4 NOS (3 W+1 S) Inflow: 56. 25 MLD outflow: 45. 00 M LD Reject: 11. 25 MLD Cooum Canal TREATED WATER STORAGE TANK 45 MLD DEGASSER TOWER

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OVERALL VIEW OF TTRO PLANT

TTRO – RO PRODUCT WATER CHARACTERISTICS Sl. No Parameters unit RO Product Water 1 Flow MLD 2 TDS mg/l <70 3 BOD mg/l BDL 4 COD mg/l BDL 5 Total Silica mg/l <5 Phase I : 45 MLD Phase II: 60 MLD (inclusive 45 MLD)

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TRANSMISSION ROUTE FOR CONVEYING PRODUCT WATER 18

BENEFICIARIES OF TTRO WATER ØThe estimated quantity of TTRO water required for various SIPCOT Industrial hubs are as follows : Ø At Irungattukottai : 09. 70 MLD Ø At Sriperumbudur : 13. 30 MLD Ø At Oragadam : 22. 00 MLD Estimated quantity : 45. 00 MLD

FINANCIAL IMPACT ON SUPPLY OF TTRO WATER Project cost for Koyambedu = Rs 486. 21 crores Proposed rate of supply = Rs 120 / kl Pay back period = 3 years (approx)

OVERALL BENEFITS ON REUSE OF WASTE WATER Ø To ensure continuous water supply to industries Ø Reduction in fresh water demand by the industries. Ø To increase the rate of supply of domestic consumption Ø To generate the revenue for CMWSSB.

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