Design Technology for Sewage Treatment Plant

STP

1. Optimisation of Design & Optimisation of Design &
Technology for Sewage TreatmentTechnology for Sewage Treatment
by by
Vinita DhupkarVinita Dhupkar
2121
stst
February, 2014 February, 2014
National Conference on Energy & National Conference on Energy &
EnvironmentEnvironment

2. •Water Stress
•Sewage Generation & Treatment
•Sewage Treatment – Technology Options
•Overview of Technologies
•Technology Comparison & Assessment
•Technology Selection
•Way Forward

4. Yesterday Yesterday : Water Pollution: Water Pollution
Today Today : Water Stress: Water Stress
Tomorrow Tomorrow : Water Scarcity: Water Scarcity

5. •Growing Population
•Increasing Urbanisation
•Insufficient Infrastructure
•Over Extraction of Ground water
•Poor Treatment & Maintenance
•Increasing Gap between Demand & Supply

6. Ref : CPCB Report on Performance Evaluation of STPs, 2013Ref : CPCB Report on Performance Evaluation of STPs, 2013

7. Metropolitan CitiesMetropolitan Cities Class I CitiesClass I Cities Class II CitiesClass II Cities
Ref : CPCB Report on Performance Evaluation of STPs, 2013Ref : CPCB Report on Performance Evaluation of STPs, 2013

9. Option 1 : ACTIVATED SLUDGE PROCESS (ASP/ EA)
Option 2 : MOVING BED BIO REACTOR (MBBR) / FIXED
AERATED BIOREACTOR (FAB)
Option 3 : SEQUENTIAL BATCH REACTOR (SBR)
Option 4 : MEMBRANE BIO REACTOR (MBR)
Option 5 : UPFLOW ANAEROBIC SLUDGE BLANKET
(UASB) REACTOR
Option 6 : TRICKING FILTER (TF)

10. AERATION TANK
SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS FILTRATE TO AERATION TANK
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE INLET CHAMBER
RAW SEWAGE
PUMPING STATION
AT-SC-CHL

11. AERATION TANK
SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS
FILTRATE TO AT
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
PRIMARY CLARIFIER
RAW SEWAGE INLET
CHAMBER
SLUDGE STABILISATION
SLUDGE THICKNER
PC-AT-SC-CHL

14. AERATION TANK (MBBR)
SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS FILTRATE TO AERATION TANK
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
RAW SEWAGE INLET
CHAMBER
MBBR-SC-CHL

16. SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS FILTRATE TO AERATION TANK
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
RAW SEWAGE INLET
CHAMBER
AERATION TANK (FAB)
FAB-SC-CHL

17. SCREENING
GRIT REMOVAL
GRIT
TREATED
WATER TO
DIPSOSAL
SBR - 2
INLET
CHAMBER
SLUDGE
SUMP
CHLORINE CONTACT TANK
CENTRIFUGE
(SLUDGE DEWATERING)
RETURN SLUDGE
SURPLUS SLUDGE
BLOWER
CHLORINE
SLUDGE
PUMP
RAW
SEWAGE
DECANTERDIFFUSERS
BLOWER
SBR - 1
SBR-CHL

18. SBR

20. TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS FILTRATE TO AERATION TANK
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
RAW SEWAGE INLET
CHAMBER
MBR TANK
MBR-CHL

21. MBR

22. AERATION TANK / FACULTATIVE LAGOON
SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS
FILTRATE TO AT
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
RAW SEWAGE INLET
CHAMBER
GAS HOLDER
SLUDGE THICKNER
UASB
GAS
ENGINE
ELECTRICITY
UASB-AT-SC-CHL

24. AERATION TANK
SECONDARY
CLARIFIER
TREATED
WATER
DISINFECTION
CHLORINE
SLUDGE DRYING BEDS
FILTRATE TO AT
SCREENING
GRIT REMOVAL
GRIT
RAW
SEWAGE
RAW SEWAGE INLET
CHAMBER
SLUDGE THICKNER
TRICKLING FILTER
TF-AT-SC-CHL

27. 0
5
10
15
20
UASB ASP MBBR MBR SBR
Area, Acres
Area, Acres
0
50
100
150
200
250
300
Capital Cost, Crs(100MLD)
UASB
ASP
MBBR
MBR
SBR

28. 0
0.5
1
1.5
2
2.5
3
Power, Rs/m3
UASB
ASP
MBBR
MBR
SBR
0
0.2
0.4
0.6
0.8
1
1.2
UASB ASP MBBR MBR SBR
Maintenance cost,Rs./m3

29. Treated Sewage Parameters

30. Technology Assessment for Sewage Treatment
Criteria
OP ASP MBBR SBR MBR
UASB
+ASP
TF +
ASP
Quality of Treated Effleunt
             
Nutrient Removal potential
             
Low Land Requirement potential
             
Low Capital Cost potential
             
Low Power Requirement Potential
             
Electricity generation potential
             
Low O & M Skills Potential
             
  Low   Medium
  High 
Very
High

31. TECHNOLOGY SELECTION
Objective 4
Objective 1
Objective 3
Objective 2
Recycle
Reuse
Reduce
Capital
Cost
Reduce
Space
Reduce
Operatio
n
Cost
UASB
ASP
MBBR
SBR
MBR
MBBR
UASB
SBR
SBR
MBR

32. Technology Options
Domestic
Wastewater
Technologies
Treatment &
Recycle / Reuse
(Desalination)
Treatment &
energy
production
Treatment &
Reuse
UP, Delhi
Maharashtra
Gujarat
AP, Karnataka
Chennai
Kerala

33. •Recycle / Reuse
•Techno-economically viable technologies
•Improvement in O&M
•Reduction in Operational Cost by Innovations
•Stringent Policies & Implementation by Govt.
•Promotion of PPP Models

34. Yesterday Yesterday : Water Pollution: Water Pollution
Today Today : Water Stress: Water Stress
Tomorrow Tomorrow : Water Scarcity: Water Scarcity
Day After Tomorrow Day After Tomorrow : Water War: Water War

35. Thank You !
Do not let the well dry,
to learn the worth of Water !
Vinita Dhupkar