These wastes are prequalified and permits are issued by plant staff. This station allows the plant to generate revenue which reduces sewer user fees. Wastes of this type would present problems for our plant's liquid processes, however, they are compatible with the anaerobic digester process. The liquid waste is pumped from the receiving station to the anaerobic digesters for treatment. Receiving Station Anaerobic Digestion One of the most interesting and visible characteristics of the plant is the presence of the egg-shaped anaerobic digesters.
Anaerobic digestion is another biological process that utilizes microbes.
These organisms stabilize the sludges from the DAF and primary treatment. Primary and waste activated sludges are pumped to a blending tank where they are heated. From the blending tank the blended sludge is pumped into the anaerobic digesters. These large egg-shaped digesters are maintained at a temperature of 95 degrees Fahrenheit and are void of oxygen. The products of anaerobic digestion are a reduced sludge volume, carbon dioxide, methane gas and water.