BioCord’s low-energy compressors beat blowers for efficiency and cost

Compressors help efficiently deliver oxygen to each BioCord Reactor, allowing for the development of a robust, contaminant-removing biofilm.

Aeration is costly, so when we designed Bishop BioCord reactors, we focused on achieving a high level of nutrient reduction using the least possible amount of energy.

Instead of using blowers and coarse bubble aeration for BioCord Reactors, we perfected an aeration system that uses fine bubble diffusers and low-energy compressors.

Then we tested it and found that the compressor/fine bubble aeration system can achieve similar levels of dissolved oxygen in the reactor tank to blowers, even though it delivers almost 50% less air. Not only does that translate to lower initial capital costs (compressors cost less than blowers) but it also contributes to major operational savings in energy costs and maintenance.

Research project proves results

Last year, we conducted a research project with Dr. Martha Dagnew of Western University to demonstrate the high oxygen transfer capability of the integrated fine-bubble aeration system in BioCord reactors.

We ran two nearly identical BioCord Reactor systems at the Greenway WWTP in London, Ontario. The only difference was that one was equipped with a compressor and fine-bubble aeration system with maximum air flow capability of 50 LPM. The other was equipped with a blower and coarse-bubble aeration system, capable of maximum airflow of 90 LPM.

The systems ran over a period of about five months using wastewater that was fed from the plant’s primary effluent.

Our results showed that the compressor system was capable of reducing influent ammonia concentrations and COD  to the same level as the blower system, despite delivering about 45% less air.

Read the full research paper here.

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