Abstract: A wastewater treatment system substantially reduces wastewater treatment time and increases treatment capacity. The system includes at least one completely covered aerobic reactor cell and a completely covered quiescent anaerobic reactor cell. The system can also include a polishing reactor for further treating wastewater after treatment by the anaerobic reactor cell. The covered aerobic reactor cell preferably includes a pair of subcells in which a first cell includes continuous mixing and aeration of the wastewater and the second cell includes only intermittent mixing and aeration of the treated wastewater. The system optionally includes a completely covered anoxic reactor cell for treating wastewater prior to treatment by the completely covered aerobic reactor cell. The anoxic reactor cell receives partially treated wastewater recirculated from the polishing reactor. Growth media can be used in the reactor cells to enhance biological activity.

Abstract: A wastewater treatment system substantially reduces wastewater treatment time and increases treatment capacity. The system includes at least one completely covered aerobic reactor cell and a completely covered quiescent anaerobic reactor cell. The system can also include a polishing reactor for further treating wastewater after treatment by the anaerobic reactor cell. The covered aerobic reactor cell preferably includes a pair of subcells in which a first cell includes continuous mixing and aeration of the wastewater and the second cell includes only intermittent mixing and aeration of the treated wastewater. The sytem optionally includes a completely covered anoxic reactor cell for treating wastewater prior to treatment by the completely covered aerobic reactor cell. The anoxic reactor cell receives partially treated wastewater recirculated from the polishing reactor.

Abstract: An anaerobic reaction system for treatment of a continuous flow of wastewater comprises a wastewater inlet, a first anaerobic reactor connected to the inlet, a second anaerobic reactor connected to the inlet and parallel to the first reactor, and a split box between the inlet and the first and second reactor. The split box channels the continuous flow of wastewater to the first reactor and to the second reactor. Effluent empties from the first reactor while wastewater in the second reactor is anaerobically reacted upon and clarified. Alternately, effluent empties from the second reactor while wastewater contained in the first reactor is anaerobically reacted upon and clarified.