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

Oak Creek, Colorado

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

ScreenScour™

ScreenScour – attached directly onto screens with intermittant air supply.

BioPortz™ Moving Media

BioPortz™

589 m2 / m3 of biologically active surface area

18 mm/15 mm

•  ~21,000 ft3 of media

BioPortz Installation

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

MBBR components

•  MBBR lift pumps

•  MBBR Heat Exchanger

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

Performance Test

Performance Test

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0.050

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2/25/2011 3/4/2011 3/11/2011 3/18/2011 3/25/2011

g N

H3-

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2 d

ay

Date

Loading Rate

Performance Test

Performance Test

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10%

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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

Erin.Gallimore@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