Sewage treating plant with double-area gravity-elution membrane bioreactor

Abstract

The present invention belongs to the sewage treating plant of biochemical technology and membrane separating technology, and especially relates to a sewage treating plant with double-area gravity-elution membrane bioreactor. The plant consists of upflow type reactor and container, the said reactor as biochemical reaction area has central pipe and sewage inlet in the upper side wall, and the said container as solid-liquid separation area has membrane assembly with aeration pipe in the bottom. The container has air inlet and air outlet in the upper part and mixed liquid inlet in the lower part is communicated with the bottom of the upflow type reactor. Some communicated pipe via the side wall of the upflow type reactor is installed to communicate with the reactor and the central pipe of the reactor. The plant needs no suction equipment, high aeration efficiency and low power consumption.

Description

technical field [0001] The invention belongs to equipment for treating waste water by using biochemical technology and membrane separation technology, in particular to a double-zone gravity outflow membrane bioreactor waste water treatment equipment. Background technique [0002] Membrane bioreactor is a water treatment technology that replaces secondary sedimentation tanks and sand filters in traditional biochemical treatment technology by membrane filtration. The emergence of membrane bioreactors improves the separation efficiency of mud and water, and at the same time increases the biochemical reaction rate due to the increase in the concentration of activated sludge in the aeration tank and the emergence of special bacteria (especially dominant bacteria) in the sludge. At the same time, by reducing the sludge load and reducing the amount of excess sludge, the outstanding problems of traditional biological treatment methods are basically solved. [0003] Early separation...

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Problems solved by technology

[0005] Therefore, the existing integrated membrane bioreactor has the following disadvantages: (1) higher sludge concentration has a greater impact on the membrane flux of the membrane bioreactor, resulting in a reduction in the wastewater treatment capacity of the membrane bioreactor; ( 2) Higher sludge concentration is likely to cause membrane fouling. In order to reduce membrane fouling, higher aeration volume is required, so the aeration power consumption per unit of water treatment is higher; (3) The membrane module is located in the bioreactor Internal, difficult to clean and maintain

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