Anaerobic lagoon or tank design for eflluent carbon to nitrogen ratio control

摘要

An anaerobic lagoon wastewater treatment system, which includes a plurality of wastewater treatment zones. The treatment zones are either formed by providing a plurality of separate lagoons or by providing one or more partitioning elements within one lagoon. One or more treatment zones may also be provided in the form of an anaerobic tank. The first wastewater treatment zone in the direction of wastewater flow has a smaller volume than the second wastewater treatment zone. Further, the first wastewater treatment zone achieves a significant reduction in fat, oil and grease removal, as well as in total suspended solids removal, but only a modest reduction in biological oxygen demand. An effluent from the first wastewater treatment zone is mixed with an effluent from the second wastewater treatment zone such that a predetermined ratio of carbon to nitrogen is maintained within the mixture of first and second effluents.

主权项

1. An anaerobic lagoon wastewater treatment system comprising:
an anaerobic lagoon or an anaerobic tank; a partitioning element positioned within the anaerobic lagoon or the anaerobic tank to define a plurality of wastewater treatment zones; and a first effluent pipeline for transporting an effluent from a first wastewater treatment zone from among the plurality of wastewater treatment zones to an outlet end of the anaerobic lagoon or an outlet end of the anaerobic tank.