Industrial Fluid Management, Inc. was approached in the spring of 2004 to investigate the feasibility of reducing odors from a solids handling facility that accepted household septage, grease trap wastes and food processing waste. City infrastructure problems were allowing odors from the solids handling facility's effluent to become prevalent at nearby businesses.
After review of the operation, it was discovered that much of the odor problem downstream in the sewers was in part due to the poor dewatering of the processed solids from the facility. This allowed higher strength waste to enter the sewer, causing the formation of obnoxious malodors downstream from the solids handling facility.
IFM discovered that much of the waste being handled at the facility did not dewater efficiently. IFM suggested that the addition of certain biological products would promote the breakdown of the grease, flour and high organics. This bioaugmentation approach would lead to improved dewatering and less blinding of the dewatering filters.
The addition of IFM's Alternative Oxygen Source Microbes (AOS 2008) and Munox XL Plus 1 improved the operation of the solids handling facility. Within the first two weeks of trial operations to determine optimum bacteria dosing, the solids handling facility began to process drier cake (resulting in reduced landfill costs) and discharge higher quality effluent to the city sewer. Odors from the facility were dramatically reduced and complaints from the nearby businesses ceased.
This approach was also used at the food processing facility, providing additional pretreatment of the grease containg waste prior to arriving at the solids handling facility. This application has proven successful in reducing the food processor surcharges by allowing the solids handler to pump all year long versus the previous method of seasonal pumping and land applying of this waste.
As a result of the success of this project, the food processor and the solids handler have continued to increase the effectiveness of bioaugmentation at each site. This has resulted in lower waste handling costs and has eliminated the odor complaints.