Abstract: Novel methods and apparatuses are disclosed for the treatment of wastewater to reduce often associated offensive odors by promoting aerobic conditions through decreasing the amount of oxygen required to maintain aerobic cultures and/or aerobic biological activity in the wastewater. Also, the wastewater is screened or otherwise separated the wastewater to remove or concentrate the solids which are anaerobically digested. By concentrating the solids, a smaller digester can be used. The anaerobic digestion produces biogas that may be collected and used, or burned by a flare or oxidized by a semipermeable membrane to deodorize the biogas. The heat produced from the biogas may have a variety of uses, including raising the temperature of the anaerobic digester and the bacterial metabolism. The wastewater is also clarified to remove nitrogenous and organic carbon wastes.

Abstract: Novel methods and apparatuses are disclosed for the treatment of wastewater to reduce often associated offensive odors by promoting aerobic conditions through decreasing the amount of oxygen required to maintain aerobic cultures and/or aerobic biological activity in the wastewater.

Abstract: An system for treating livestock wastewater to provide treated water suitable for exposure to livestock and crop irrigation. The system provides an anoxic culture, an anaerobic culture, and an aerobic culture, to which wastewater is exposed sequentially. Also provided is return of water from the aerobic culture to the anoxic culture for further treatment. The aerobic culture may be provided such that conditions cycle from aerobic to anoxic. Clarified, treated water results, wherein the resulting water is suitable for exposure to livestock, such as for flushing livestock waste. The resulting water is also suitable for crop irrigation.