Abstract:The City of Portland, Bureau of Environmental Services, uses a few different technologies to control odors at its main wastewater treatment plant. The most recent additions to the odor control facilities at the Columbia Boulevard Wastewater Treatment Plant are biofilters that treat odorous air from the plant's solids processing areas. Three large-scale biofilters were constructed by reusing existing composting vessels. The system treats up to 49,000 cfm and began operation in November of 2002.Prior to proceedi… Show more
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