TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Method: The biogas from the anaerobic digester is collected, stored, and burned. An anaerobic digester is covered with a floating cover that is nonpermeable or semipermeable. Bacteria are used on and/or in the membrane to partially oxidize and deodorize the diffusing biogas. The biogas is burned for a heat source to elevate the temperature of the wastewater in the anaerobic digester. It is also burned to generate electricity. An engine is used to burn the biogas to drive a generator and produce electricity. It produces a heated exhaust and engine waste heat. A portion of the engine waste heat and/or heated exhaust is used to raise the temperature of the water in the anaerobic digester to speed up the anaerobic digester. A first portion of the wastewater in the lagoon is treated with anoxic culture(s) in an anoxic zone. A second portion of the wastewater in the lagoon is treated with anaerobic culture(s) in an anaerobic zone. A third portion of the wastewater in the lagoon is treated with aerobic culture(s) in an aerobic zone. The cultures biologically reduce carbon from the wastewater and/or reduce the nitrogen content of the wastewater. The wastewater is treated with at least one chemical upstream from the clarifier.Preferred Component: The mechanism for burning the biogas is an engine, a gas generator, an electrical generator, a flare, and/or a gas burner.Preferred Property: The anaerobic digester reduces the organic components in the wastewater to approximately 100-10000 mg/l and/or the concentration of the solids allows the use of an anaerobic digester of a reduced size as compared to an anaerobic digester that has solids that have not been concentrated. The lagoon reduces the organic components in the wastewater to approximately 25-1000 mg/l and/or nitrogenous wastes are reduced by denitrification to 5-250 mg/l.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: An anaerobic digester is covered with a semipermeable membrane comprising an ultraviolet resistant polymer material that allows the biogas to slowly diffuse and to become partially oxidized and deodorized.