An Innovative Energy Saving Primary Filtration Using Cloth ...An Innovative Energy Saving Primary...
Transcript of An Innovative Energy Saving Primary Filtration Using Cloth ...An Innovative Energy Saving Primary...
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Jia (Jack) Ma, PhD, PE, D.WREProduct Manager – Filtration
An Innovative Energy Saving Primary Filtration Using Cloth Media Technology
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Agenda
• Introduction to Aqua-Aerobic Systems
• OptiFiber® Pile Cloth Media Filtration
• Primary Filtration at Rock River Water Reclamation
District, IL
• Summary
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Aqua-Aerobic Systems, Inc.Loves Park, IL
• Founded in 1969, Privately Held Company
• 130 Employees (Office and Manufacturing)
• Applied Engineering Focus
• > 10% of Profits Back to R&D
• Manufacture Key Components
• > 24 Patented Products and Processes
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Technology Timeline
1969
Aqua‐Jet® Aerator
1975 1984 1986 1991 1993 1999 2003 2004
AquaDDM® Mixer
AquaABF® Filter
Aqua MixAir®System
AquaSBR® System
Aqua MSBR® System
Cloth Media Filtration
AquaMB Process®
System
AquaDiamond® Filter
2005
Aqua‐Aerobic® MBR System
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Technology Timeline
2006
AquaPASS® System
IntelliPro® Process
Management System
ContinuedInnovation
2008 2009 2010 2011 2012
AquaBioMax™
OptiFiber PES‐14
MicroFiber OxyMix® Pure Oxygen Mixer
Aqua
UltraFiltration™
Flow Characterization
Intellipro®Aqua‐Jet® TTHM Approval
2013
Research Technology Center
Aqua MegaDisk™
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Filtration ExperienceOver 3,000 Units Installed
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OptiFiber® Pile Cloth Media Filtration
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OptiFiber Pile Cloth Media
• Pile Construction
• Polyester Support Backing
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Maximize
• Removal of TSS
• Hydraulic throughput
Minimize
• Chemical
• Backwash
Filtration Goals
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Filtration Particle Removal Mechanisms
Straining
Sedimentation
Impaction
Interception
Adhesion
Flocculation
Surface Mechanism
Depth Filtration
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So, what does all this mean?
Rapid Sand Filter
L/D = 500-1000
PES-14 Microfiber
L/D = 425-715
L/D Ratio
L=300-600 mm
D=d10=0.6 mm D≈0.007 mm
L=3-5 mmWhen wet
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Filtration Particle Removal Mechanisms
Surface Mechanism Depth Filtration
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AquaDisk® Cloth Media Filter
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How AquaDisk® Cloth Media Filter Works
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How AquaDisk® Cloth Media Filter Works
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How AquaDisk® Cloth Media Filter Works
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Primary FiltrationRock River Water Reclamation District
April 8 – July 13 2014
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Testing Objectives
Hydraulic and solids loading capabilities
Relative cloth performance (PA2-13 vs. Microfiber vs. Clarifier)
Energy savings
BW/SW volume and frequency (% of applied flow)
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Research & Technology Center
– Located at Rock River Water Reclamation District
– 80ft by 60 ft x 14 ft (tall)– Inputs: primary influent and
effluent, secondary effluent, RAS
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Testing Equipment
Screen (¼ inch
openings) Filtration
Grit removal
Raw Sewage
Primary
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Testing Conditions
24/7 operation
Side-by-side testing with primary clarifier
Flux rates 3.25 – 4.0 gpm/sf-day, mostly 3.25 gpm/sf-day
Filter influent TSS averaged 236 mg/L (104 – 526 mg/L)
Solids loading rates approximately 9 – 10 lb/sf-day
No chemical addition
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OptiFiber PA2-13®
(April 8 – May 9, 2014)
OptiFiber® Pile Cloth Media Tested
OptiFiber PES-14®
(May 9 – July 13, 2014)
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Results:
1Represents the average of daily removals Σ(inf-eff)/∑inf, not removal of overall averages (Σinf –Σeff)/Σinf2Results represent one grab sample per medium
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Results – TSS & BOD Removal:
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Results – TSS Removal:
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Results – TSS Trending
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Results – TSS Trending
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Results – BOD Removal:
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Results – BOD Trending
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Results – BOD Trending
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Results – UVT Improvement:
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Results – UVT Trending
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Results – UVT Trending
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Summary
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Performance
• Consistently high effluent for the variable influent conditions
Filters in lieu of Primary Clarification
• Better removal of TSS and BOD5
• More VSS (~25-38%) to the anaerobic digester
• More energy recovery (gas production)
• Less energy (~30-45%) use in the downstream aeration process
Primary Effluent Disinfection Systems
• Reduced Energy/Improved performance
Implications:
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Backwash
• Ranged from 12 to 13% of the applied flow
• Optimization was not an objective of this study
• Improvement can be achieved by BW set-point adjustment and filter basin re-design
Fats, Oils and Grease (FOG)
• Did not affect the operation or removal performance
Implications:
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40 ft
60 ft
Settling Basin
12 ft
20 ft
Aqua MegaDisk Filter
Implications:
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• Replacement of primary clarifier for better removals and smallerfootprint
• Carbon reduction to reduce energy in the activated sludge process
• Carbon diversion to improve gas production in anaerobic digestion
• Treatment of combined and sanitary sewer overflows (CSO & SSO) for TSS and BOD reduction
• Stormwater treatment
• Other high solids treatment process
Potential Applications: