tertiary mbbr technology provides innovative solutiontertiary mbbr technology provides innovative...
TRANSCRIPT
Tertiary MBBR technology provides
innovative solution
Erin Gallimore Jason Bowman
ENTEX Technologies Inc.
Joe Walsh was on to something… • Innovative solution
• Rugged Terrain • Environmental Factors • Growing Population
• Project introduction
• Design • Challenge • MBBR
• Performance test
• Summary
The need for innovative solutions
Population growth
Environmental factors
Environmental factors + population growth lead to increase in regulatory pressure...
…and added stress on wastewater treatment systems.
Yahoo travel
Project Introduction
• Town of Oak Creek, CO (Yampa Valley)
• Elevation of 7,200 ft
• Landlocked • Domestic + Watershed + Mechanical
plant
• Existing lagoon treatment w/ surface aeration
• Ambient winter conditions below freezing
• Lagoon temperatures well below 4 °C
• Permit Limits • Summer – 7 mg/L NH3-N • Winter – 9 mg/L NH3-N
Winter nitrification
Project Introduction
Design Challenge
Design Conditions
• Winter WW Temperature, °C 4.5
• Influent MBBR TKN, mg/l 3-40
• Design Max Influent Flow, mgd 0.25
• Total Influent MBBR BOD, mg/l 22-40
Existing WWTP
Design Approach
• Surface aerators replaced with fine bubble diffused aeration
• Control Building constructed
• Two in-ground MBBR basins
• Blowers
• Lift pumps
• Heat Exchanger
MBBR design
• Maximize Biomass • maintain current footprint • greenfield – smaller footprint
• Headworks
• 6 mm screening • Percent Fill
• 35 – 67%
• Requires coarse bubble diffusers
• Screens for all inlets, outlets • 10 mm inlet/outlet
• Headloss across screens • 2 inch per stage
• Foam Management
• Site flooding potential
BioPortz™ Moving Media Systems Components
Media HDPE media poured into basin up to 67% full
Aeration Coarse bubble system
Screens Stainless steel fabricated retaining screens keep the media in the basin
MBBR design • Two in-ground basins
• Operated in series
• 6,100 ft3 of operating volume
• 14 ft swd
• 42 % fill • Total of 2,600 ft3 moving media
• Total ~465,000 ft2 surface area
MBBR components
• Foam screen • 4 ft x 1 ft
• 10-mm slot width
• Media retention screen
• 10-mm slot width
• 12.75-inch diameter x 2.5 ft
• ScreenScourTM control system
• Aeration - 24-inch wideband diffusers • Coarse bubble
• Instrumentation and controls
• ScreenScour • Blowers • Heat Exchanger • DO
MBBR components
Performance Test • 30 day performance testing
• February thru March 2011
• Coldest time period of year (historically)
• Samples taken to local independent lab
• Online monitoring for comparison
Performance Test
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.350
0.400
0.450
2/25/2011 3/4/2011 3/11/2011 3/18/2011 3/25/2011
g N
H3-
N/m
2 d
ay
Date
Loading Rate
Performance Test
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2/24/2011 3/1/2011 3/6/2011 3/11/2011 3/16/2011 3/21/2011 3/26/2011 3/31/2011
Perc
ent R
emov
ed
Date
Percent NH3-N Removed
Summary
Effluent concentration well below permit.
Flows exceeding design while meeting permit. Innovative technology for cold weather nitrification.
Special thanks to…
Jason Bowman Jacobs Engineering
Town of Oak Creek, Colorado Duckels Construction Cirque Productions ACZ Laboratories
Any questions?
ENTEX Technologies Inc. 400 Silver Cedar Court, Suite 200
Chapel Hill, NC 27514 919.606.5734
www.entexinc.com
BioPortz™ Moving Media High Rate Biokinetics
High rate mixing shears biomass— resulting in thin biofilm— allowing for high rate biokinetics.
Three year joint study with Entex Technologies & Duke University at the South Durham WRF, Durham NC.
Pilot operated as a IFAS system with BioPortz media in parallel with a non-IFAS control.
Research & Development Continuing work on IFAS & SFF
Anaerobic Anoxic Aerobic
Clarifier Membrane Unit
Nitrate recycleRAS
RAS
FISH image of ammonia oxidizers