Valens Nicholson P. Eng.Engineering Project Manager
The City of Barrie has engaged the services of a Consulting Engineering firm to conduct a study that will evaluate alternatives for the optimization of biogas usage at the City’s Wastewater Treatment Facility (WwTF).
The study will also provide recommendations for ventilation upgrades for the cogeneration (cogen) building to address the heat generated by the cogen engines at the WwTF.
The WwTF has been utilizing biogas produced from its anaerobic digesters to generate power and heat onsite through its two cogeneration (cogen) engines and two boilers since 1995. Both the boilers and cogen engines utilize either natural gas or biogas. A gas pre-treatment system consisting of a gas booster, gas dryer chiller, and carbon absorption tower is required to treat the biogas generated at the WwTF. The pre-treatment system removes water and impurities from the biogas prior to use in the cogen engines or boilers. A waste gas burner is utilized during periods when gas production exceed the WwTF's ability to utilize the biogas in either cogen.
Excess biogas (a natural bi-product of sewage treatment) is being burnt off. This is a normal process at the WwTF.
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