Comparison of Wastewater Treatment Technologies
Transcript of Comparison of Wastewater Treatment Technologies
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Comparison of Wastewater Treatment Technologies
Engr. Nariyah Marie B. Ilagan
Business Development Manager
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Key Points
Wastewater Treatment Overview
Various Wastewater Technologies
Feasibility Study
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Wastewater Treatment Overview
Philippine Laws:
▪ P.D. 1586 - Environmental Impact Statement
▪ P.D. 984 - Pollution Control Law
▪ R.A. 9275 - Clean Water Act
▪ R.A. 8749 - Clean Air Act
▪ R.A. 6969 - Toxic Substances and Hazardous
and Nuclear Wastes
▪ R.A. 9003 - Ecological Solid Waste
Management
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Wastewater Treatment Overview
Environmental Effects:
▪ Water pollution
▪ Disruption of aquatic systems
▪ Diseases
▪ Water scarcity
▪ Loss of biodiversity
▪ Climate change
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Wastewater Treatment Overview
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Wastewater Treatment Overview
Preliminary Treatment Primary Treatment
Screening(Coarse, fine, grit removal)
Flow Equalization
Primary Settling Tank
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Wastewater Treatment Overview
Secondary Treatment
Biological Aeration Secondary Clarifier
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Wastewater Treatment Overview
Tertiary Treatment
Disinfection Sludge Dewatering
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Key Points
Wastewater Treatment Overview
Various Wastewater Technologies
Feasibility Study
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Solid Waste
Conventional Activated Sludge (CAS)
Raw Wastewater Screening Primary Clarifier Biological Aeration
Secondary ClarifierChlorine Contact
Treated Wastewater
Sludge Holding
Polymer
Thickener & DewateringRAS
2° WAS
1° WAS
1° & 2 °WAS
Biosolids
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2° WASSolid Waste
Sequential Batch Reactor (SBR)
Raw Wastewater Screening Primary Clarifier
Chlorine Contact
Treated Wastewater
Sludge Holding
Polymer
Thickener & Dewatering
1° WAS
1° & 2 °WAS
Biosolids
Biological Aeration
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Solid Waste
Moving Bed Bio Reactor (MBBR)
Raw Wastewater Screening Biological Aeration
Secondary ClarifierChlorine Contact
Treated Wastewater
Sludge Holding
Polymer
Thickener & Dewatering RAS
WAS
WAS
Biosolids
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Solid Waste
Membrane Bio Reactor (MBR)
Raw Wastewater Screening Biological Aeration
MembraneChlorine Contact
Treated Wastewater
Sludge Holding
Polymer
Thickener & Dewatering
RAS(Retentate)
WAS
Biosolids
WAS
Chemical Dosing
Backwash Permeate
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Key Points
Wastewater Treatment Overview
Various Wastewater Technologies
Feasibility Study
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Feasibility Study
Facility Profile:
Location Panglao, Bohol
Wastewater type
Domestic and Commercial
Capacity 5 MLD (Phase 1: 1 MLD)
Year of study August 2020
Technologies considered
▪ CAS▪ SBR▪ MBBR▪ MBR▪ BioCleaner
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Solid Waste
BioCleaner Technology
Raw Wastewater Screening Anaerobic Digestion
Chlorine ContactTreated Wastewater
Biological Aeration
Return Feed
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Feasibility Study
Multi Criteria AnalysisCAS (MLE) SBR MBBR MBR BioCleaner
Low footprint 2 2 3 3 1
Compliance to DAO 2016-08 effluent
standards2 1 2 3 3
Low energy consumption 2 2 2 1 3
Low chemical consumption 2 2 3 3 3
Ease of operations 2 1 1 2 3
>10 reference installations 3 3 1 1 1
Listed technology in WWTP journals
and handbook3 3 3 3 0
Process stability 2 2 2 2 2
TOTAL 18 17 17 18 16
Legend:
0 Unmet target
1 Below target
2 Meets target
3 Exceeds target
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Feasibility Study
TechnologyAream2
CapExM, PhP
Without Recycling
Effluent Type
With Recycling
OperationalM, PhP
RatingSavingsM, PhP
OperationalM, PhP
Rating
CAS (Modified Ludzack-Ettinger)
880 37 32 3 Class B 18 14 2
SBR 413 56 30 2 Class C 0 30 5
MBBR 400 62 36 4 Class B 18 18 3
MBR 285 71 52 5 Class A 36 20 4
BioCleaner 932 72 21 1 Class B 18 3 1
Cost Comparison
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Feasibility Study
Results:
▪ BioCleaner was the chosen technology
▪ Modern and innovative
▪ Cost-efficient
▪ Environment friendly
▪ Sustainable
▪ Awaiting start of facility construction