BioWeb and Webitat Fixed Media IFAS Systems
Sarah Hubbell Director of Technology, Entex Technologies Inc.
History of BioWeb
R&D
Design Approach
Description of Equipment
Sneak Preview
Got Biomass?
Moving Media “MBBR” Media
Floating Media
Carrier Elements
Media Options
Fixed Media Rope Type Media
Rigid PVC Media
BioWeb or Webitat
Fixed vs. Moving media When to use which ?
Fixed Media Moving Media
Lowest capital cost criticalNew pretreatment basins –
need to minimize new basin size
Power cost significant criteria Stretching limits of basin capacity even with IFAS
Flood zone or other high risk of media washouts
Extremes of loading, temperature, etc.
Existing plant close to new standards, but not quite capable
Treatment of high strength waste in small volumes
Advantages Simple installation—
quick and inexpensive
Simple expansion with addition of modules
Can use fine bubble diffusers, existing systems
Fixed MediaAdvantages and Disadvantages
Disadvantages Predation by redworms
may require DO control
Kinetics not as high as moving media systems
Fine screens or primaries are required
Simple Installation
Save space and costs by augmenting existing basins with IFAS media.
Reuse Fine Bubble Diffusers
Fixed Media Options
Rigid Medias:• Trickling Filter
• Tubular Bundles
Dynamic Medias:• Rope Type
• Hexagonal Matrix
• Fabric Sheet Matrix
Ringlace
Development of BioWeb
BioWeb - New York City - 1996• Tallman Island, NY
• 80 mgd WWTP• Ringlace• Chinese Lanterns• PVC Sheet Media
Continued R & D
Design Options
Modeling/Simulation Software
Published kinetic rates
Pilot Studies
Models
Aquifas www.aquifas.com
BioWin www.envirosim.com
GPS-X www.hydromantis.com
Pro2D (exclusive to CH2M Hill)
Webitat Diffusers
Lift showing air scour / DO control for redworms
WebitatBioFilm and Predator Control
3rd generation fixed media system
Sensor(optional)
Side Shrouds(all 4 vertical sides) BioWeb Media
(Partial BioWeb shown)
Controlled airlift mixing from under Webitat modulevertically through module then out of the top
Webitat for Lagoons
BioWeb Installations Tallman Island WWTP, New York City North Buffalo WWTP, Greensboro, NC Environmental Center for Livestock Waste Management (ECLWM), Taiwan Windsor Locks WPCF, Windsor Locks, CT Mamaroneck, NY Ashfield, MA Alimente Breton Foods, Siegas, New Brunswick, Canada Donner Summit PUD, Soda Springs, CA Harbor Road WWTP, Green Cove Springs, FL Port Austin, MI Stewart Creek WWTP, The Colony, TX Kenosha Beef, WI Newark, NY Coeur D’Alene, ID Stafford Springs, CT Johnstown, PA
BioWeb InstallationsWindsor Locks—2001
1.43 MGD Design Flow — BioWeb installed in both trains, following side by side demonstration
BioWeb InstallationsThe Colony, TX—2005
Modules installed in the annular ring in one of two circular tanks
Two of a total of 24 modules placed in tank over fine bubble diffusers
BioPortz
Without Biomass
With Biomass
Plastic—HDPE
Summary
IFAS is an economical upgrade option
Moving and Fixed Media both good options
Aeration design must be carefully considered
Models are available for sizing
Any Questions?ENTEX Technologies Inc. 400 Silver Cedar Court, Suite 260Chapel Hill, NC 27514919.933.2770 [email protected] www.entexinc.com