Back to basics to drive energy savings: Optimizing dissolved oxygen for biological uptake

Western University study evaluates dissolved oxygen uptake in BioCord Reactor fixed-film system

A new collaboration between Bishop Water Technologies and Western University aims to improve the operating efficiency of BioCord™ Reactors. The project aims to demonstrate the energy-saving advantage of using a fine bubble compressor aeration system compared to a more conventional coarse bubble and blower system. Evaluating the effectiveness of each system to continuously remove ammonia and BOD and determining the differences in dissolved oxygen uptake in conjunction with Bishop’s BioCord Reactors. The two systems have very different air and energy inputs, but will be used with identical Reactors.

Resulting from an introduction by the Southern Ontario Water Consortium (SOWC) to Dr. Martha Dagnew at Western University, the collaborative study is being conducted in a test of bay at the SOWC London Wastewater Facility. Dr. Dagnew’s research team continually monitors the BioCord Reactor system to achieve optimal aeration for biofilm growth and contaminant removal.

dissolved oxygen uptake testing

“We have proven the effectiveness of the BioCord Reactor system through previous research projects and pilot testing,” says Kevin Bossy, CEO of Bishop Water Technologies. “With additional support from SOWC, this project is helping us further enhance our solution. We are studying dissolved oxygen uptake to understand the process better. The information will allow us to optimize the BioCord Reactor system and add to the overall knowledge base on the topic.”

Research study to validate energy savings

The BioCord Reactor system usually operates with small, dedicated 110V air compressors instead of large energy-intensive blowers. The study will provide valuable operational data that will further validate the energy savings provided by this approach.

Compressors deliver air to each Reactor through a flexible, sinking air hose that connects to fine bubble diffuser tubing. This specialized tubing helps maintain high pressure along the full length of the air hose, which can often run 30m (100ft) or more. This study aims to support existing research showing fine bubbles diffuse more easily into water due to increased surface area. Fine bubbles also have a higher biological uptake rate.

Data collection and analysis will continue through December 2018 with funding from the SOWC’s Advancing Water Technologies (AWT) program. Stay tuned for more updates on this project in our e-newsletter!

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