Potential of Sewage Treatment Plants in Bangalore_V C Kumar_2013

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Potential of Sewage Treatment Plants in Bangalore_V C Kumar_2013

  1. 1. POTENTIAL OF STP’S IN BANGALORE By V. C. Kumar Executive Engineer, BWSSB
  2. 2. Bangalore Water Supply and Sewerage Board A statutory organization set up in 1964 under the BWSSB Act whose core functions & responsibilities include :  Providing water supply & sewerage and sewage disposal systems  Ensuring sufficient of domestic water supply to the required standards.  Levying & collecting water/sanitation charges on a no loss/no profit basis.
  3. 3. Bruhath Bangalore Mahanagara Palike Boundaries Sq.K m 1 BMA 1306 2 Bruhath Bangalore 810 i) Core Area Sewerage Catchments 245 ii)7-CMCs & 1-TMC 250 iii) 111 Villages around Bangalore 315 S.No. BMRDA Boundary 1306 Sq. Kms CDP Boundary 594 Sq. Kms Core Area 226 Sq. Kms
  4. 4. BBMP
  5. 5. Source of Water Supply # # # ## ## # # # # # #### # # ## # # #
  6. 6. Source of Water Supply
  7. 7. Bangalore Water Supply 1891-1900 1921-1930 1931-1940 1951-1960 1961-1970 1971-1980 1981-1990 1991-2000 2001-2010 2011-2020 1896- Hesargatta WSS – untreated water Hesargatta – Combined jewel filters T G Halli Arkavathi WSS-27 MLD 1952-T G Halli – 45 MLD added 1964 – T G Halli – 135 MLD 1974 – CWSS I Stage – 135 MLD 1882- CWSS Stage II – 135 MLD 1993- CWSS Stage III – 270 MLD 2002 – CWSS Stage IV phase I -270 MLD Proposed CWSS Stage IV Phase II – 500 MLD
  8. 8. Present Water Supply Year of commissioning Installed Capacity (MLD) Arkavathy (TG Halli) 1933 149 0 Cauvery Stage I 1974 135 135 Cauvery Stage II 1983 135 135 Cauvery Stage III 1993 270 270 Cauvery Stage IV, Phase – I 2002 270 300 Cauvery Stage IV, Phase – II 2012 500 300 Projects Total Supply 1459 Present Supply (MLD) 1140
  9. 9. Wastewater Generation of wastewater Year Quantity in MLD 2006 875 2011 985 2021 1320 2036 1570
  10. 10. BANGALORE SANITATION  Bangalore is blessed with undulated terrain having natural gradient  Wastewater generated flows out of the city in all the four directions  Wastewater generated is collected and conveyed through the sewerage network to the treatment plants for treatment up to Secondary level and disposed to the natural course  BWSSB has setup 14 treatment plants of secondary and Tertiary level of various capacities all-round the city – 721 MLD Capacity  Four Tertiary treatment plants of total capacity 73 MLD has been established and treated water is reused for non potable purposes
  11. 11. ABOUT BANGALORE SANITARY SYSTEM 1920-1950 1950-1960 1970-1980 Sewerage system existed Major sewerage system constructed K & C Valley wastewater treatment plant (Primary) & V- Valley STP 1980-2000 K & C and V Valley and Hebbal upgraded to secondary 2000-2010 CWSS Stage IV Phase I – 7 treatment plants & sewerage system 2012 - 2015 CWSS Stage IV Phase II – 11 treatment plants – 339 MLD capacity
  12. 12. Core Area Sewerage Net work Major and Minor Valleys Hebbal Valley STP Hebbal Valley Area in Sq.Km. (32) To Raja Canal STP Area in Sq Kms (35) Vrishbhavathi Valley (38) (36) Koramangala Valley (31) To Mailasandra STP Katriguppe Valley (16) Kathariguppe 16 38 35 229 % $ K-Minor Valley % V-Valley STP 19 K&C Valley STP % Kempambudhi Mini-STP # Taverekere Arkavathi Challaghatta Valley 37 Vrishabhavathi Hebbal Minor Valley-2 (5) 36 Total Hebbal Minor Valley-1 (11) Arkavathi Valley 48 Koramangala # Hebbal Challaghatta % (6) Tavarakere Valley # (19) % Madivala Mini-STP Agaram SPS Bellandur Lake Major Valleys 1 – K & C Valley 2 – V Valley 3 – Hebbal Valley
  13. 13. Abstract of sewer statistics < 400mm Core Area • 150 mm dia • 175 mm dia • 225 mm dia • 300 mm dia • Total No. of Manholes – 1490 Kms – 450 Kms – 1600 Kms – 275 Kms –1,28,000
  14. 14. ABSTRACT OF SEWER STATISTICS >400MM CORE AREA Zones Total Length in Km Existing inside SWD in Km No of manholes in Nos Hebbal 45 9 1650 K&C 113 35 2857 V Valley 85 18 1746 Total 243 62 6253
  15. 15. Wastewater Treatment Plants Sl. No. Location Capacity in MLD Treatment Facility Under CWSS I, II, III stages 1. Vrishabhavathi Valley 180 Secondary – Trickling filters 2. K & C Valley I 248 Secondary: Activated sludge process 3. Hebbal Valley 60 Secondary: Activated sludge process 4. Madivala 04 Secondary: UASB + oxidation ponds+ constructed wetlands 5. Kempambudhi 01 Secondary: extended Aeration 6. Yelahanka 10 Activated sludge process + filtration+ chlorination (Tertiary)
  16. 16. Wastewater Treatment Plants Sl. No. Location Capacity in MLD Treatment Facility 7. Mylasandra 75 Secondary – Extended aeration 8. Nagasandra 20 Secondary -Extended aeration 9. Jakkur 10 Secondary – UASB +Extended aeration 10. K. R. Puram 20 Secondary – UASB +Extended aeration 11. Kadabeesanahalli 50 Secondary-Extended aeration 12. Rajacanal 40 Secondary- Extended aeration 13. Cubbon Park 1.5 Membrane 14. Lalbagh 1.5 Grand Total 721 Extended Aeration + Plate Settlers + UV disinfection
  17. 17. Treatment plants proposed under CWSS Stage IV Phase II Name Capacity in MLD Process (Including BNR) Raja Canal 40 Extended Aeration (EA) Horamavu Agara 20 Sequential Batch Reactor (SBR) Nagasandra 20 SBR Chikkabanavara 5 SBR Kadugodi 6 SBR Kachohalli 3 Membrane Bio – Reactor Kengeri 60 Activated Sludge Process (ASP) K & C Valley 60 ASP Bellandur Amanikere 90 ASP Doddabele 20 SBR Yellemallappa Chetty Kere 15 SBR Total 339
  18. 18. Wastewater Treatment Plants Raw sewage characteristics Raw sewage BOD : Average 300 mg/lit Raw sewage suspended solids: Average 400-500 mg/lit Treated effluent standards ( Secondary) Treated effluent BOD Treated effluent suspended solids : < 20 mg/lit : < 30 mg/lit Tertiary standards Treated effluent BOD Treated effluent suspended solids Coliforms : < 5 mg/lit : < 5 mg/lit : < 2.2/100ml
  19. 19. Locations of existing STP`s Yelahanka TTP Jakkur STP Nagasandra STP Hebbal STP Rajacanal STP KR Puram STP Kadabeesanahalli STP V Valley STP & TTP Mylasandra STP K & C Valley STP Kempambudhi STP Madiwala STP
  20. 20. K & C Valley Sewage Treatment Plant K & C Valley STP (Activated Sludge Process) Capacity 163 MLD Capital cost 602 Lakhs Installed capacity of power 1475 KVA Power Charges 50 Lakhs per year Cost of Man power utilised 25 Lakhs per year Total O & M charges 75.60 lakhs per year K & C Valley STP Capacity 55 MLD additional module Capital cost 2900 Lakhs K & C Valley STP (Extended Aeration Process) Capacity 30 MLD Capital cost Lakhs Installed capacity of power 2700 750 KVA
  21. 21. Koramangala And Challaghatta Valley Treatment Plant – 30 MLD Plant Agaram Pump House K & C Valley treatment plant
  22. 22. Koramangala And Challaghatta Valley Treatment Plant – 30 MLD Plant Aeration Tank
  23. 23. Madiwala Water Reclamation Plant Name of the STP Location : : Madiwala STP Madiwala Capacity : 4 MLD capacity Treatment Process : First & Secondary Year of Construction : 1998 Capital cost : 121 Lakhs Catchment Area : Tavarekere Effluent characteristics : BOD < 20m g/L & SS <30 mg/L Installed Capacity of power : 35 KVA Power Charges : 3.7 Lakhs per year Cost of Man power utilised : 10.0 Lakhs per year Total O & M charges : 13.7 lakhs per year
  24. 24. Madivala Water Reclamation Plant UASB side view
  25. 25. Madivala Water Reclamation Plant UASB with sludge withdrawal piping arrangement
  26. 26. V. Valley Sewage treatment Plant V. Valley STP (Trickling Filter) Capacity 180 MLD Capital cost Lakhs 1122 Installed Capacity of power 1400 KVA Power Charges 60 Lakhs per year Cost of Man power utilised 45 Lakhs per year
  27. 27. V. Valley Sewage treatment Plant - Recycling Plant Effluent Standards - BOD < 5 mg/ L - SS < 5 mg/ L - Turbidity < 2 NTU V. Valley Tertiary Treatment plant ( Trickling filter followed by Densadeg and Flopac & disinfectin by Chlorination) Capacity Capital cost 60 MLD 3873 Lakhs Power Charges 84 Lakhs per year Cost of Man power utilised 37 Lakhs per year Chemical Charges if any 36 Lakhs per year Total O & M charges 157 lakhs per year
  28. 28. V. Valley Sewage treatment Plant - Recycling Plant
  29. 29. V. Valley Sewage treatment Plant - Recycling Plant
  30. 30. Kempambudhi Water Reclamation Plant (Activated Sludge Process) Capacity 01 MLD Capital cost 135 Lakhs Installed capacity of power Power Charges 49 KVA 5.0 Lakhs per year Total O & M charges 5.6 lakhs per year (including man power)
  31. 31. Hebbal Sewage Treatment Plant (Activated Sludge Process) Capacity 60 MLD Capital cost 1100 Lakhs Installed capacity of power 975 KVA Power Charges 114 Lakhs per year Cost of Man power utilised 40 Lakhs per year Total O & M charges 154 lakhs per year
  32. 32. YELAHANKA Tertiary Treatment plant (Conventional ASP followed with filtration by Chlorination) Capacity 10 MLD Capital cost 3873 Lakhs Installed capacity of power 500 KVA Effluent Standards Power Charges 84 Lakhs per year Cost of Man power utilised 37 Lakhs per year - BOD < 5 mg/ L Chemical Charges if any 36 Lakhs per year - SS < 5 mg/ L Total O & M charges 157 lakhs per year - Turbidity < 2 NTU Supplied to International Airport, BEL, Wheel and Axle and other industries
  33. 33. Kempambudhi Water Reclamation (Activated Sludge Process) Capacity 1 MLD Capital cost 135 Lakhs Installed capacity of power 49 KVA Power Charges 5.0 Lakhs / Year Total O & M charges 5.6 lakhs / Year (including man power)
  34. 34. MAILASANDRA STP (Extended Aeration Process) Capacity 75 MLD Capital cost : 5200 Lakhs
  35. 35. Kadabeesanahalli STP (Extended Aeration Process) Capacity 50 MLD
  36. 36. NAGASANDRA STP (Extended Aeration Process) Capacity 20 MLD Capital cost Rs.1400 Lakhs
  37. 37. Jakkur (UASB Process) Capacity 10 MLD
  38. 38. K R Purum (UASB Process) Capacity 20 MLD
  39. 39. Rajacanal (Extended Aeration Process) Capacity 40 MLD
  40. 40. Cubbon Park (Membrane Process) Capacity 1.50 MLD
  41. 41. Lalbagh Park (Extended Aeration Process) Capacity 1.50 MLD
  42. 42. Tertiary Treated Water Utilizations Sl. No. Consumer Wastewater in KLD 1. International Airport 1000 2 3. 4. 5. 6. 7. 8. BEL Wheel and Axle Plant – Railway ITC Limited IAF Aravind Mills Cubbon Park Lalbagh TOTAL 1200 300 300 200 1000 1500 1500 7000 Selling rate - Rs.25/- per KL Revenue - 4.50 Crores per year
  43. 43. Cubbon Park Tertiary Treatment Plant
  44. 44. RAW SEWAGE AND TREATED WATER CHARACTERISTICS Parameter Unit Influent Effluent Actual pH - 6.8 – 8.0 6.5 – 8.0 7.2 BOD Mg/L 330 <4 <2 TSS Mg/L 450 <3 <1 Turbidity NTU - <2 0.05 Fecal Coliform MPN/ 100 mL nil BDL BDL Coliform Index MPN/ 100 mL 109 – 1010 2.3 BDL
  45. 45. Quality of treated wastewater Raw Sewage Treated wastewater

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