ORGANIC WASTEWATER TREATMENT METHOD AND ORGANIC WASTEWATER TREATMENT DEVICE

• Main Authors: SUZUKI KUNIYASU, ISHIHARA YUKAKO, YATSUGI SOICHIRO, YANASE HITOSHI
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2019
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Provided is an organic wastewater treatment method that can efficiently perform biological treatment. For an organic wastewater treatment device provided with a biological treatment tank wherein a pair of an oxygen free tank disposed on the upstream side along the flow of organic wastewater that includes nitrogen and an aerobic tank disposed on the downstream side so as to have a membrane separation device immersed in activated sludge is a biological treatment unit and a plurality of the biological treatment units are connected in series, with a sludge return pathway for returning activated sludge to the oxygen free tank disposed most to the upstream side from the aerobic tank disposed most to the downstream side, this organic wastewater treatment method determines whether or not to stop amembrane separation device during operation for each organic treatment unit or start the membrane separation device while stopped with at least one of amount of inflow of organic wastewater, level ofliquid in water tank, pre