Method and device for treating sewage through synergistic action of activated sludge and biomembrane

Abstract

The invention discloses a method and a device for treating sewage through synergistic action of activated sludge and a biomembrane, which belong to the technical field of environmental protection and energy conservation. The device consists of an inner layer and an outer layer, wherein the inner layer is a complete activated sludge biological treatment area; and the outer layer is an activated sludge and the biomembrane joint biological treatment area. The method comprises the following steps: firstly, a stage of performing anaerobic treatment on the activated sludge, namely controlling the quantity of return sludge and staying for certain time in the stage; secondly, introducing the sewage after the treatment in the anaerobic treatment stage into the outer layer, namely the activated sludge and the biomembrane joint biological treatment area through an inner layer water outlet pipe; and finally, discharging the sewage satisfying the discharge requirement from a water outlet on the outer layer of the device. The treatment device can combine various treatment processes, has flexible running modes, saves the project investment, reduces the floor area, and has short process flow by comparing with other treatment devices or structures; besides, the return quantity of the sludge is reduced by 40 to 80 percent, and the running cost is reduced by 18 to 31 percent.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and energy saving, and relates to a sewage biological treatment method and treatment equipment thereof, in particular to an anaerobic and aerobic bioactive sludge and biofilm synergy (HBSM, Hybrid Bio-Activated Sludge and Membrane) Wastewater treatment methods and treatment equipment. Background technique [0002] High-concentration wastewater, especially high-concentration wastewater containing chemicals and fibers that are difficult to biodegrade, is difficult to meet the discharge standards with conventional sewage aerobic treatment processes, and the treatment efficiency is low and energy consumption is high, making many types of enterprises Or similar sewage treatment projects feel the difficulty of sewage treatment and the unbearable treatment cost. [0003] Sewage treatment process or technology is basically divided into two parts. One is the physical and chemical treatme...

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Problems solved by technology

In order to achieve the purpose of nitrogen and phosphorus removal in biological treatment, it is necessary to create anaerobic, anoxic and aerobic regions in the space or time of the reactor, so as to realize different forms of anaerobic-aerobic phosphorus removal and aerobic-anoxic dephosphorization. Nitrogen, the required hydraulic retention time is longer, and some processes reach more than 12 hours, and the capital construction cost and operating cost are high

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