Sewage Treatment Processes Sewage Treatment Processes in Haryana - - PowerPoint PPT Presentation

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Sewage Treatment Processes Sewage Treatment Processes in Haryana - - PowerPoint PPT Presentation

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Sewage Treatment Processes Sewage Treatment Processes in Haryana in Haryana by by SFC Environmental

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Sewage Treatment Processes Sewage Treatment Processes in Haryana in Haryana

by by

SFC Environmental Technologies SFC Environmental Technologies Pvt.

  • Pvt. Ltd.

Ltd.

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Contents

  • Introduction
  • Sewage Characterisation
  • Treated Sewage Discharge Standards
  • Treatment units in Sewage Treatment
  • Treatment units in Sewage Treatment
  • Basics of Biological Process
  • Overview of Sewage Treatment Technologies
  • Technology Pros and Cons
  • Discussion
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Introduction

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POPULATION

TOTAL POPULATION AS PER 2011 CENSUS

121,01,93,422

URBAN URBAN RURAL

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URBAN POPULATION

60 80 100 120

Urban Population in crores

20 40 2011 2021 2031 2041 2051 Year

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SEWAGE GENERATION

60000 80000 100000 120000

Estimated sewage generation, MLD

20000 40000 60000 2011 2021 2031 2041 2051 Year

STP Capacity as on 2009 - 11553

GAP

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Status of Most Sewage Treatment Plant in India

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Sewage generation & Treatment Sewage generation & Treatment

Ref Ref : : CPCB CPCB Report Report on

  • n Performance

Performance Evaluation Evaluation of

  • f STPs,

STPs, 2013 2013

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Over Exploiting & Indiscriminate Disposal Of Polluted Water Into Limited Water Resources Is Further Aggravating The Problem

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Sewage discharge into river

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State of Yamuna river

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Polluted Yamuna

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Dal Lake, Srinagar

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Powai Lake, Mumbai

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Usual scenes of water bodies

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Haryana Scenario

2001 2011 2021

Urban Population

2,964,678 4,755,000 10,504,000

Sewage generation, MLD

374 599 1342

Sewage Treated, MLD

164 199

Gap, MLD

200 400

Ref : National Capital Region Planning Board (NCRPB) Report, Ministry of Urban Development, GoI

400 MLD sewage goes untreated into water bodies / drains / rivers

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About SETPL....

Proper & efficient treatment technology is required for providing Sustainable & Economical Solution to this problem …

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Sewage Characteristics

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Types of contaminants in Sewage Types of contaminants in Sewage

ORGANIC - Decays INORGANIC

  • Sugar
  • Milk

Suspended Dissolved Suspended Dissolved

  • Vegetable matter
  • Food residue
  • Floating

Plastic bags

  • Settling

Sand Grit

  • Salt

Biological treatment Primary treatment No treatment

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SEWAGE CHARACTERISTICS

Floating material/ Large suspended matter Sand/ Grit Oil & Grease Chokes pumps/ pipes Silting in tanks/ receiving bodies Floating scum/ sticking to tanks

RAW SEWAGE CONTAINS

Oil & Grease Suspended Solids Organic matter (BOD/COD) Nitrogen Phosporous Floating scum/ sticking to tanks & pipes Silting & septicity Septicity/ odour/ depletion of DO Growth of aquatic plants Growth of aquatic plants

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BOD / COD BOD / COD

BOD Biological Oxygen Demand COD Chemical Oxygen Demand

  • Sugar
  • Milk

Suspended Dissolved Suspended Dissolved

  • Vegetable matter
  • Food residue
  • Chemicals
  • Oil
  • Sulphides

BOD is amount of oxygen required by bacteria to degrade

  • rganic matter

COD is amount of oxygen required by chemicals to degrade organic matter

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TREATMENT STANDARDS

Parameter Raw CPCB BOD5, mg/L 250-300 < 30 COD, mg/L 400-550 < 250 TSS, mg/L 300-600 < 100 Turbidity, NTU

  • NH4-N, mg/L

35-45 < 50 State PCB < 30 < 250 < 100

  • < 50

MoUD < 10

  • < 10
  • US EPA

< 10

  • < 2
  • NH4-N, mg/L

35-45 < 50 TN, mg/L 40-50

  • TP, mg/L

5-8 < 5 pH 5.5 to 8.5 5.5 to 9.0 Faecal Coliforms (MPN/100 ml) 106

  • Residual

Chlorine, mg/L

  • < 1

< 50

  • < 5

5.5 to 9.0

  • < 1
  • < 10

< 2

  • < 230
  • 6-9

Nil < 1

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Sewage Flows

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100 150 200 250 % Design Flow

DAILY FLOW VARIATIONS OF RAW SEWAGE Peak Flow – 2.25 times Peak Flow Average Flow

50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Hrs

Lean Flow – 0.5 times Pumps have to be designed to cater to both peak and average flow.

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Typical Flow Diagram of Sewage Treatment Plant Typical Flow Diagram of Sewage Treatment Plant

FINE SCREENING GRIT REMOVAL

GRIT

RAW SEWAGE

INLET CHAMBER RAW SEWAGE PUMPING COARSE SCREENING

RAW SEWAGE PUMPING STATION PRIMARY TREATMENT

AERATION TANK SECONDARY CLARIFIER

TREATED WATER

DISINFECTION

CHLORINE

SLUDGE RECIRCULATION AIR BLOWER

RAW SEWAGE PUMPING STATION PRIMARY TREATMENT SECONDARY TREATMENT TERTIARY TREATMENT

SLUDGE SUMP CENTRIFUGE

SLUDGE

SLUDGE DEWATERING

SURPLUS SLUDGE

CENTRATE TO AT

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Basics of Biological Treatment

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BASICS OF AEROBIC BIOLOGICAL PROCESS

ORGANIC MATTER + BACTERIA + OXYGEN

  • ORGANIC MATTER + BACTERIA + OXYGEN
  • NEW BACTERIA + CO2 + H2O

BOD/COD SURPLUS SLUDGE MLSS

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CO2, H20 NEW ORGANIC MATTER NEW CELLS

(SLUDGE)

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TO MEET THE OBJECTIVE OF ORGANIC MATTER REMOVAL, BIO-MASS FORMED (WHICH ITSELF IS ORGANIC IN NATURE) SHOULD ALSO BE SEPARATED.

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USUALLY, A SETTLING TANK IS PROVIDED TO SEPARATE BIO-MASS FORMED DURING ORGANIC MATTER DEGRADATION.

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ORGANIC MATTER (FOOD) O2 NUTRIENTS (N/P) AERATION BASIN TEMP. MIXING BACTERIA

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  • Next Session :

Next Session : Next Session : Next Session : Sewage Treatment Units & Sewage Treatment Units & Sewage Treatment Units & Sewage Treatment Units & Biological Treatment Technologies Biological Treatment Technologies Biological Treatment Technologies Biological Treatment Technologies