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A Side-By-Side Test of 4 Different Types of Media in Bio-trickling Filters @ Hyperion Treatment Plant. Cyrous Gilani, P.E. (City of Los Angeles) Kenneth R. Redd, P.E. (City of Los Angeles) Michael J. Sarullo, P.E. (City of Los Angeles) R. Tim Haug, Ph.D., P.E., (City of Los Angeles).

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A Side-By-Side Test of 4 Different Types of Media in Bio-trickling Filters@Hyperion Treatment Plant

Cyrous Gilani, P.E. (City of Los Angeles)

Kenneth R. Redd, P.E. (City of Los Angeles)

Michael J. Sarullo, P.E. (City of Los Angeles)

R. Tim Haug, Ph.D., P.E., (City of Los Angeles)

City of Los AngelesDept. of Public WorksBureau of EngineeringEnvironmental Engineering Division

WEF/A&WMA ODORS AND AIR POLLUTANTS 2010Charlotte, North CarolinaMarch 2010

project background

Project Background

The City is building 2 Air Treatment Facilities (ATFs) along the path of two large diameter interceptor sewers.

The ATFs involve Bio-trickling filter technology as the primary air treatment stage followed by carbon adsorption as the polishing stage.

In an effort to improve the BTF performance, a new media manufactured by Taiwan based Matala Water Technology was identified and tested at the Hyperion Plant.

Through a joint effort between Daniel Mechanical Company and City of Los Angeles, a test unit consisting of 4 identical reactor vessels was designed and manufactured to test different types of media under the same condition (a side-by-side comparison test).

Installation was completed and testing began June of 2009.

4 vessels test unit fabricated by daniel mechanical company
3’ Diameter, 10’ high

One level media, 3’ high

2’ Sump at the bottom of each unit

Re-cycled Irrigation supplemented with nutrient

Continuous Irrigation

Continuous make-up water and nutrient

4-Vessels Test unit Fabricated ByDaniel Mechanical Company
selected media1
Selected Media

Matala SM 365

Zander Media

Virgin Carbon

Lava Rock Media

summary of performance

Summary of Performance

Effective and consistent H2S removal on all three media.

The vessel containing the lava rock performed well during the 1st start-up. However, during the 2nd start-up, its performance dropped.

The pH of the vessel containing lava rock was measured to be approximately 2.5 for the duration of this test. Numerous attempts were made to lower the pH by reducing the make-up water. Lowering the rate of the make-up water did not affect the pH.

Matala and Zander both demonstrated excellent performance in terms of H2Sremoval.

Although all three media effectively removed H2S, significant amounts of odors attributed to other odor causing compounds, remained in the outlet air stream of each vessel.

Inlet odor measurements ranged from 10,000 to 50,000 odor units, while outlet odor measurements for all three media ranged from 2,500 to 5,000 odor units.

There was no direct correlation between remaining odors and H2S levels in the outlet air stream, indicating that the majority of remaining odors were not caused by H2S.

wef a wma odors and air pollutants 2010 charlotte north carolina march 2010

WEF/A&WMA ODORS AND AIR POLLUTANTS 2010Charlotte, North CarolinaMarch 2010

QUESTIONS

City of Los AngelesDept. of Public WorksBureau of EngineeringEnvironmental Engineering Division