Multistage OA -MBR oxidation ditch

The utility model discloses a multistage OA the MBR oxidation ditch, including intake pool, the first oxidative ditch, second oxidation ditch and separate tank, the intake pool with it backs down a mouthful mutual intercommunication to be provided with the pond between the the first oxidative ditch, be provided with first aeration equipment in the intake pool, the the first oxidative ditch is kept away from the one end of intake pool is connected the second oxidation ditch, the the first oxidative ditch with the one end that the second oxidation ditch is connected is provided with second aeration equipment, the second oxidation ditch is kept away from the one end of the first oxidative ditch is connected the separate tank, be provided with the MBR membrane module in the separate tank. This technical scheme is arranged in solving current oxidation ditch technology existence and needs backward flow, the unbalanced problem of carbon -nitrogen ratio. 本实用新型公开了种多级OA-MBR氧化沟，包括进水池、第氧化沟、第二氧化沟和分离池，所述进水池与所述第氧化沟之间设置有池顶开口