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STP in Residential complexes

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Presentation on Waste water Management in Residential complexes by Dr.Anant , Ecotech engineering , in Estate Manager Workshop-II conducted by ApartmentAdda.com on 18th Nov 2010 in Bangalore.

Presentation on Waste water Management in Residential complexes by Dr.Anant , Ecotech engineering , in Estate Manager Workshop-II conducted by ApartmentAdda.com on 18th Nov 2010 in Bangalore.

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STP in Residential complexes STP in Residential complexes Presentation Transcript

  • SEWAGE TREATMENT PLANTSIN RESIDENTIAL COMPLEXES Dr. Ananth S. KodavasalEcotech Engineering Consultancy Pvt. Ltd.
  • CONTENTS1. WASTEWATER POLLUTANTS/ IMPACT2. TYPICAL STP FOR A RESIDENTIAL COMPLEX3. THREE RULES FOR A GOOD STP - PROPER DESIGN - PROPER ENGINEERING - PROPER OPERATION & MAINTENANCE 2
  • 1. WASTEWATER POLLUTANTS/ IMPACT WHY WASTEWATER TREATMENT ?- COMPLIANCE WITH LAW !!!- RESOURCE RECOVERY – WATER IS PRECIOUS !- IMPROVED SURFACE/ GROUND WATER QUALITY- IMPROVED PUBLIC HEALTH- IMPROVED FLORA & FAUNA- LONG TERM SUSTAINABILITY 3
  • POLLUTING INDUSTRIES / ACTIVITIESDOMESTIC ( BPO/ SOFTWARE, RESIDENTIAL)METALS / MINERALS PROCESSINGFOOD PROCESSING INCL. FERMENTATIONOIL & PETROCHEMCALSCHEMICALS, BULK DRUGSTEXTILESPULP & PAPERETC., ETC. 4
  • TYPES & EFFFECTS OF POLLUTIONO&G : TREATMENT EFICIENCY AESTHETICSHEAVY METALS : TOXICITYORGANIC CMPDS. : TOXICITYBOD/ COD : OXYGEN DEPLETIONN, P : EUTROPHICATIONPATHOGENS : DISEASES 5
  • THREE CARDINAL RULES FOR A GOOD WWT PLANTPROPER DESIGN OF TRTMNT PLANTPROPER ENGG. OF TRTMNT PLANTPROPER O&M OF TREATMENT PLANT 6
  • SOME PHYSICAL CHARACTERISTICSpHCOLOURODOURTURBIDITYSOLIDS – SUSPENDED/ DISSOLVEDTEMPERATURE 7
  • SOME CHEMICAL CHARACTERISTICSORGANIC CONTENTSPECIFIC ORGANIC COMPOUNDSTOXIC COMPOUNDSHEAVY METALSREACTIVITY( CONVENTIONAL MEASURES SUCH AS COD TOD, TOC ) 8
  • WASTEWATER QUANTITY,DISCHARGE PATTERN• DAILY AVERAGE• HOURLY AVG./ PEAK HOUR•CONTINUOUS / INTERMITTENT 10
  • BASIC BIOLOGICAL REACTION IN STPFOOD MICRO O2 BES + ENERGY + GASESNUTR. MORE + PRODUCTS MICROBES 10
  • 2. TYPICAL DESIGN OF A GOOD STPTREATMENT UNITS , PROCESSES SCREENING, GRIT REMOVAL O&G REMOVAL EQUALISATION/ HOMOGENISATION AERATION SETTLING & SLUDGE RECIRCULATION FILTRATION ( SAND FILTER + CARBON FILTER) DISNFECTION ( CHLORINATION) EXCESS SLUDGE DEWATERING, DISPOSAL 11
  • DESIGN BASIS FOR BIOLOGICAL TREAMTMENTAEROBIC TREATMENT• pH• TEMPERATURE• FOOD• OXYGEN REQUIREMENTS• TYPE OF WASTE• FOOD TO MICROORGANISMS ( F/M) 12
  • • SLUDGE AGE• MLSS LEVEL• SLUDGE RETURN RATE• EXCESS SLUDGE PRODUCTION• DISSOLVED OXYGEN LEVEL• MIXING IN AERATION TANK• SETTLING CHARACTERISTICS OF SLUDGE•TYPE OF MICROORGANISMS 13
  • TYPICAL INTEGRATION OF TREATMENT UNITS/STAGES• PRELIMINARY TREATMENT• PRIMARY TREATMENT• SECONDARY TREATMENT• TERTIARY TREATMENT 14
  • TYPICAL FLOWSHEET OF STP SCREEN GRIT/GRSE EQLSTN PR. TRTMENT SEC. CLRFR AER. TANK SEC. TRTMENT SAND FILTER AC FILTER SLDGE HNDLNG CHLORINE TERT. TRTMENT 15
  • 4. OPERATION & MAINTENANCEPROBLEMSSCREEN : CLOGGING, ODOURGRIT CHAMBER : POOR SEPARATIONPRMRY CLRFIER : FLOATING SLUDGE LOW SOLIDS IN SLUDGEAERATION TANK : FOAMING, MIXING, OVER/ UNDER AERATIONSEC. CLRFIER : BULKING SLUDGE PIN POINT FLOCS 16
  • SEC. CLRFIER : NO CLARITY IN WATER POOR SLUDGE SETTLINGPR. SAND FILTER : INSUFFICIENT CLARITY BACK PRESSURE HIGHACT. CARB. FLTR : NO IMPROVEMENTSTP OPERATOR : UNTRAINED UN MOTIVATED UN SUPERVISED INDISCPLINEDDESIGN FAULTS : REDESIGN/ REENGINEER 17
  • KSPCB COMPLIANCESFORM 1 – AIR CONSENT : ANNUALFORM 13 – WATER CONSENT : ANNUALFORM V - ENV. STATEMENT : ANNUALFORM 1 - CESS RETURNS : MONTHLYFORMS UNDER HWM RULES , AUTHORISATIONFORMS UNDER BATTERY RULES 18
  • ECOTECH COMPANY PROFILE•ESTABLISHED IN 1986•DESIGN, ENGINEERING OF TREATMENT PLANTS•COMMISSIONING, UPGRADATION, O&M•REIA, WATER, WASTEWATER, ETP AUDIT•OVER 500 PROJECTS HANDLED ALL OVER INDIA•OVER 75 O&M AMC CONTRACTS AT PRESENT•QUALIFIED, EXPERIENCED AND DEDICATED STAFF•3 ENV. SCIENTISTS/ ENGINEERS•5 FIELD, QUALITY & TRAINING OFFICERS•8 MECHANICS/ ELECTRICIAN / WELDERS•OVER 75 EXPERIENCED SUPERVISORS
  • THANK YOUECOTECH ENGG. CONSULTANCY PVT LTD