A systems failure at a major food products manufacturer resulted in a large quantity of fat entering the trade waste system. The treatment plant was overloaded as a result, with the aeration tank becoming anaerobic and very odorous. The waste water treatment plant was a "draw and fill" type biological plant with three cycles per day, each cycle consisting of aeration, settle and decant phases. As a result of the plant upset settling was not occurring and the final effluent was heavily contaminated with solids.
Both the influent and aeration tanks required emptying. Their contents were trucked away for direct soil injection. The aeration tank was refilled a with 50/50 water/effluent mix. Proprietary bacterial cultures (Bichem) were added and aeration commenced. After 48 hours of constant aeration the system went back into its standard cycles.
After 3 days the wastewater system was returning to normal with good settling and a much clearer final effluent. Minimal disturbance to factory output was achieved by re-seeding the system with Bichem cultures.
Ongoing Monitoring and Consultancy :
Since this time the plant has continued to function well, with Aquadynamic Consultancy Services monitoring the system on regular basis, and making recommendations and adjustments to plant operation as required.