SEWAGESEWAGE TREATMENT TREATMENT

AN ASSESSMENT OF AN ASSESSMENT OF

VARIOUS TECHNOLOGIES VARIOUS TECHNOLOGIESDr. Ananth S. KodavasalDr. Ananth S. KodavasalEcotech Engineering Consultancy Pvt. Ltd.Ecotech Engineering Consultancy Pvt. Ltd.

11February 06, 2013February 06, 2013

WHAT STARTED IT ALL OFF ?WHAT STARTED IT ALL OFF ?

1.1. Classical, Conventional EAASClassical, Conventional EAAS2.2. Anaerobic STP’s Anaerobic STP’s 3.3. CAACOCAACO4.4. EADOXEADOX5.5. SBRSBR6.6. MBBRMBBR7.7. MBRMBR 22

Classical, Conventional EAASClassical, Conventional EAAS

STP GUIDE PUBLISHED BY KSPCBSTP GUIDE PUBLISHED BY KSPCB

33

ANAEROBIC STPANAEROBIC STP NOT FIT FOR URBAN RES. COMPLEXESNOT FIT FOR URBAN RES. COMPLEXES Foul odourFoul odour Black colourationBlack colouration Black solid particlesBlack solid particles Unfit for “Urban Reuse”Unfit for “Urban Reuse” 3 STP’s modified3 STP’s modified

200 KLD ; 350 KLD ; 500 KLD200 KLD ; 350 KLD ; 500 KLD 44

EADOXEADOX ELECTROCOAGULATIONELECTROCOAGULATION Akin to Chemical CoagulationAkin to Chemical Coagulation Removes only solids/ colloidsRemoves only solids/ colloids Does not remove dissolved organicsDoes not remove dissolved organics Unsustainable electrode costsUnsustainable electrode costs

6 STP’s studied – All defunct6 STP’s studied – All defunct

66

SBRSBR SEQUENCING BATCH REACTORSEQUENCING BATCH REACTOR

No problems with TechnologyNo problems with Technology Issues with Design, EngineeringIssues with Design, Engineering Issues with critical, Mandatory EquipmentIssues with critical, Mandatory Equipment Issues related to sludge handlingIssues related to sludge handling Min. Guidelines for Design, Engg. Min. Guidelines for Design, Engg.

submittedsubmitted 77

SEQUENCE OF OPERATIONSSEQUENCE OF OPERATIONS

MOTORISED DECANTERMOTORISED DECANTER

MBBRMBBR MOVING BED BIOFILM REACTORMOVING BED BIOFILM REACTOR

No problems with TechnologyNo problems with Technology Issues with Design, EngineeringIssues with Design, Engineering Issues related to primary sedimentationIssues related to primary sedimentation Issues related to sludge handlingIssues related to sludge handling Min. Guidelines for Design, Engg. submittedMin. Guidelines for Design, Engg. submitted

88

FLOWSHEETFLOWSHEET11

PLASTIC CARRIER MEDIAPLASTIC CARRIER MEDIA11

MBRMBR MEMBRANE BIOREACTORMEMBRANE BIOREACTOR

Emerging Technology ( of future)Emerging Technology ( of future) High operating costsHigh operating costs Several unresolved issuesSeveral unresolved issues Subject of serious R&D Subject of serious R&D Not suitable for India under present state of Not suitable for India under present state of

developmentdevelopment 88

FLOWSHEETFLOWSHEET11

TYPICAL MEMBRANE CASSETTESTYPICAL MEMBRANE CASSETTES

Contd.Contd.

SUMMARY, CONCLUSIONSUMMARY, CONCLUSION

From a long term perspective, EAAS is still From a long term perspective, EAAS is still the Best Available, Practicable Technologythe Best Available, Practicable Technology

Anaerobic, CAACO, EADOX unsuitableAnaerobic, CAACO, EADOX unsuitable SBR may be considered with T&C ##SBR may be considered with T&C ## MBBR may be considered with T&C ##MBBR may be considered with T&C ## MBR is for the future, when all current MBR is for the future, when all current

issues are resolvedissues are resolved ## Pls. see Guidelines submitted to KSPCB## Pls. see Guidelines submitted to KSPCB 99

THANK YOUTHANK YOU FOR YOUR TIME ANDFOR YOUR TIME AND PATIENT HEARINGPATIENT HEARING

Dr. Ananth S Kodavasal Feb. 06, 2013Dr. Ananth S Kodavasal Feb. 06, 2013