SEPTIC TANK AND SEPTIC TANK OPERATION METHOD

• Main Authors: HIBINO ATSUSHI, WADA YASUSATO
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a septic tank and a septic operation method to solve the problem of waste water hard to flow from each discharge point in the building due to a great amount of scum production more than expected in a septic tank which is used extremely frequently for toilets, and if the tank continues to operate, the upper part of the first room of an anaerobic treatment tank is blocked by the scum, and to solve the problem of the quality of treated water to deteriorate if the amount of circulating water is reset to a lower level in order to reduce the amount of scum in the first room of the anaerobic treatment tank.SOLUTION: The present invention consists of an arrangement of an anaerobic treatment tank, an aerobic treatment tank, a sedimentation tank, and a disinfection tank, starting from the upstream side. The anaerobic treatment tank is divided into the first room of the anaerobic treatment tank and the second room of the anaerobic treatment tank by means of a partition wall. It has a pump arranged in the aerobic treatment tank or in the sedimentation tank, and a circulating water branching device in a transfer pipe of the pump. A first outlet of the circulating water branching device opens at upstream side of the first room of the anaerobic treatment tank and a second outlet of the circulating water branching device opens at upstream side of the second room of the anaerobic treatment tank.SELECTED DRAWING: Figure 2 【課題】トイレの使用頻度が極端に多い浄化槽において、スカム生成量が想定以上に多くなる場合があり、運転を続けると、嫌気処理槽第１室の上部がスカムで塞がれ、建屋内の各排出点からの排水が流れにくくなる課題を生じる。そこで、嫌気処理槽第１室のスカム発生量低減のため、循環水量を少なく設定し直すと、処理水質が悪化する課題が生じる。【解決手段】本発明は、上流側から嫌気処理槽、好気処理槽、沈殿槽、消毒槽の配列で構成され、嫌気処理槽が仕切壁によって嫌気処理槽第１室と嫌気処理槽第２室に分割され、好気処理槽の槽内、あるいは、沈殿槽の槽内にポンプが配置される浄化槽であって、ポンプの移送管に循環水分岐装置が配置され、循環水分岐装置の第一の流出口が嫌気処理槽第１室の上流側に開口し、循環水分岐装置の第二の流出口が嫌気処理槽第２室の上流側に開口する構造を採用した。【選択図】図２