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February 06, 2013

SEWAGE TREATMENT AN ASSESSMENT OF VARIOUS TECHNOLOGIES Dr. Ananth S. Kodavasal Ecotech Engineering Consultancy Pvt. Ltd. 1. February 06, 2013. WHAT STARTED IT ALL OFF ?. Classical, Conventional EAAS Anaerobic STP’s CAACO EADOX SBR MBBR MBR 2. Classical, Conventional EAAS.

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February 06, 2013

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  1. SEWAGE TREATMENT AN ASSESSMENT OF VARIOUS TECHNOLOGIESDr. Ananth S. KodavasalEcotech Engineering Consultancy Pvt. Ltd.1 February 06, 2013

  2. WHAT STARTED IT ALL OFF ? • Classical, Conventional EAAS • Anaerobic STP’s • CAACO • EADOX • SBR • MBBR • MBR 2

  3. Classical, Conventional EAAS • STP GUIDE PUBLISHED BY KSPCB 3

  4. ANAEROBIC STP • NOT FIT FOR URBAN RES. COMPLEXES • Foul odour • Black colouration • Black solid particles • Unfit for “Urban Reuse” • 3 STP’s modified 200 KLD ; 350 KLD ; 500 KLD 4

  5. EADOX • ELECTROCOAGULATION • Akin to Chemical Coagulation • Removes only solids/ colloids • Does not remove dissolved organics • Unsustainable electrode costs • 6 STP’s studied – All defunct 6

  6. SBR • SEQUENCING BATCH REACTOR • No problems with Technology • Issues with Design, Engineering • Issues with critical, Mandatory Equipment • Issues related to sludge handling • Min. Guidelines for Design, Engg. submitted 7

  7. SEQUENCE OF OPERATIONS

  8. MOTORISED DECANTER

  9. MBBR • MOVING BED BIOFILM REACTOR • No problems with Technology • Issues with Design, Engineering • Issues related to primary sedimentation • Issues related to sludge handling • Min. Guidelines for Design, Engg. submitted 8

  10. FLOWSHEET 1

  11. PLASTIC CARRIER MEDIA 1

  12. MBR • MEMBRANE BIOREACTOR • Emerging Technology ( of future) • High operating costs • Several unresolved issues • Subject of serious R&D • Not suitable for India under present state of development 8

  13. FLOWSHEET 1

  14. TYPICAL MEMBRANE CASSETTES

  15. Contd.

  16. SUMMARY, CONCLUSION • From a long term perspective, EAAS is still the Best Available, Practicable Technology • Anaerobic, CAACO, EADOX unsuitable • SBR may be considered with T&C ## • MBBR may be considered with T&C ## • MBR is for the future, when all current issues are resolved ## Pls. see Guidelines submitted to KSPCB 9

  17. THANK YOU FOR YOUR TIME AND PATIENT HEARING Dr. Ananth S Kodavasal Feb. 06, 2013

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