Title
Resolution to Approve a Purchase Order with Precision Odor for Odor Control Chemicals and Equipment for the Wastewater Treatment Plant ($60,000.00)
Memorandum
Your approval is requested to authorize a Purchase Order with Precision Odor in the amount of $60,000.00 for odor control chemicals and feed system equipment for the City's Wastewater Treatment Plant (WWTP).
During the winter season, the WWTP utilizes centrifuges to reduce the water content of liquid biosolids and produce a cake that is disposed in a landfill. Previously, dust lime was added to the cake to reduce odors to the point that the cake was acceptable to the landfill. However, the dust lime caused a significant release of strong ammonia odors during truck loading activities at the WWTP and from loaded trucks leaving the plant. These odors migrated off site, which resulted in multiple odor complaints to the Michigan Department of Environmental Quality (MDEQ). MDEQ and WWTP staffs met on several occasions to discuss how the odors could be eliminated. MDEQ staff indicated that ongoing complaints could lead to issuing citations to the WWTP and/or revoking the plant's air permit. WWTP staff researched options for odor management and determined that pilot testing of odor reducing chemicals other than lime offered the most cost effective solution.
After testing chemicals from two manufacturers that had a documented history of success at other plants, WWTP staff found that a combination of two products made by GOC was effective in reducing odors on site and making the cake acceptable to the landfill. Precision Odor is the sole distributor of these particular products made only by GOC. As part of the pilot testing, Precision Odor installed a pumping system to deliver the chemical mixture with the understanding that the City would not pay for it unless the pilot test was deemed a success. WWTP staff is requesting that Council approve a Purchase Order with Precision Odor for the purch...
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