This SlideShare was authored by Dr. Ananth Seshadri Kodavasal who has more than 30 years of experience as an environmental Engineer and is a looked upon as a foremost authority on Sewage Treatment Plants. It was presented during Water Workshop conducted by ApartmentADDA on 25-Feb-2012. It explains the below topics • Wastewater Pollutants/Impact • Physical, Chemical, Biological Unit Operations • Types & Effects of Pollution • Biological Treatment Variants • Pros and Cons At last the SlideShare details on the Important Acts and rules related to Environmental Protection. Check the link below for details http://apartmentadda.com/blog/water-workshop-for-apartments-report/

1. SEWAGE TREATMENT BASIC CONSIDERATIONS IN DESIGN & OPERATION Dr. Ananth S. Kodavasal Ecotech Engineering Consultancy Pvt. Ltd. As presented in “The Water Workshop” organized by ApartmentADDA.com FEBRUARY 2012

4. POLLUTING INDUSTRIES DOMESTIC ( BPO/ SOFTWARE/ RESIDENTIAL) METALS / MINERALS PROCESSING FOOD PROCESSING INCL. FERMENTATION OIL & PETROCHEMCALS CHEMICALS, BULK DRUGS TEXTILES PULP & PAPER ETC., ETC.

5. TYPES & EFFFECTS OF POLLUTION O&G : TREATMENT EFICIENCY AESTHETICS HEAVY METALS : TOXICITY ORGANIC CMPDS. : TOXICITY BOD/ COD : OXYGEN DEPLETION N, P : EUTROPHICATION PATHOGENS : DISEASES

8. SOME PHYSICAL CHARACTERISTICS pH COLOUR ODOUR TURBIDITY SOLIDS – SUSPENDED/ DISSOLVED TEMPERATURE

9. SOME CHEMICAL CHARACTERISTICS ORGANIC CONTENT SPECIFIC ORGANIC COMPOUNDS TOXIC COMPOUNDS HEAVY METALS REACTIVITY ( CONVENTIONAL MEASURES SUCH AS COD TOD, TOC )

10. BIOLOGICAL CHARACTERISTICS RELATIVE BIODEGRADEABILITY TYPE OF BIOLOGICAL TREATMENT (COMMON MEASURE IS BOD ) REFRACTORY ORGANICS INHIBITORY COMPOUNDS TOXIC COMPOUNDS

12. MICRO BES FOOD O2 NUTR. + ENERGY + GASES + PRODUCTS BASIC BIOLOGICAL REACTION MORE MICROBES

17. EAAS – SUSPENDED M.O EQ. TNK AER.TNK INT SUMP P S F A C F SET. TNK SLUDGE HNDLNG FNL TNK CL 2 AIR BLOWERS 17

20. SBR – BATCH REACTOR 20

21. MBR – MEMBRANE BIOREACTOR - IMMERSED 21

22. MBR – MEMBRANE BIOREACTOR - SIDESTREAM 22 22 22

23. EAAS PROS CONS 23 TIME TESTED AREA REQMNT PROVEN – CONSISTENT QLTY POWER CONSMPTN OP. FLEXIBILITY GOOD SLUDGE QUALITY EASY MONITORING CONTROL LOW SKILL LVLS

24. SBR PROS CONS 24 LESS NO. OF UNITS SOPHISTICATED DECANTER REQD. LESS POWER NUMBER OF BATCHES – LIMITS NOT SUITED FOR HIGH PEAK FLOWS MORE LOAD ON FILTERS SLUDGE HANDLING ISSUES

25. MBBR PROS CONS 25 NONE KNOWN NEED PRIMARY SETTLING POOR ENERGY EFFICIENCY SLUDGE HANDLING ISSUES MONITORING, CONTROL DIFFICULT DIFFUSERS MTCE. ISSUES

26. MBR PROS CONS 26 GOOD QUALITY WATER HIGH INITIAL & REPLCMNT COSTS HIGH POWER HIGH CHEMICALS UNRESOLVED OP. ISSUES HIGH SKILLS HIGH LVL PRETRTMNT

33. TYPICAL FLOWSHEET OF TREATMENT SCREEN GRIT/GRSE EQLSTN SETTLING AN. REACTOR AER. TANK SEC. CLRFR SAND FILTER AC FILTER SLDGE HNDLNG SEC. TRTMENT PR. TRTMENT TERT. TRTMENT

35. 4. OPERATION & MAINTENANCE PROBLEMS SCREEN : CLOGGING, ODOUR GRIT CHAMBER : POOR SEPARATION PRMRY CLRFIER : FLOATING SLUDGE LOW SOLIDS IN SLUDGE AERATION TANK : FOAMING, MIXING, OVER/ UNDER AERATION SEC. CLRFIER : BULKING SLUDGE PIN POINT FLOCS

36. SEC. CLRFIER : NO CLARITY IN WATER POOR SLUDGE SETTLING PR. SAND FILTER : INSUFFICIENT CLARITY BACK PRESSURE HIGH ACT. CARB. FLTR : NO IMPROVEMENT ETP OPERATOR : UNTRAINED UN MOTIVATED UN SUPERVISED INDISCPLINED DESIGN FAULTS : REDESIGN/ REENGINEER

42. THANK YOU ECOTECH ENGG. CONSULTANCY PVT LTD