CIRCULATING TYPE SEWAGE CLEANING APPARATUS OF TEMPORARY TOILET

PROBLEM TO BE SOLVED: To achieve excellent sewage treatment efficiency and to prevent washing water to be reutilized from becoming turbid by partitioning a sewage treatment tank into first and second aeration tanks and a treated water tank of membrane treated water and arranging a membrane treatment tank pumping up primary treated water after aeration treatment to subject the same to membrane treatment. SOLUTION: Washing sewage from a toilet is allowed to flow down to a first aeration tank 16 from the inflow port 18 of a sewage inflow pipe 19. When new washing sewage flows in the first aeration tank 16, primary treated sewage stagnated in the transfer passage provided to the terminal part of the first aeration tank 16 flows to a second aeration tank from a flooding wall 23. The treated sewage overflowing the underwater weir 30 of the terminal part of a transfer passage 27 is pumped up to a membrane treatment tank 32 by a pump P1 and filtered by the filtering treatment membrane 34 of a membrane separation chamber 35 while a membrane surface is aerated and washed by an air diffusing device 36 and secondary treated sewage being membrane treated water is gathered to be allowed to flow in a treated water tank 40 from a transfer pipe 41. The filtered untreated water overflowing the membrane treatment tank 32 is returned to the terminal part of the first aeration tank 16 from a return pipe 39.