Electric flocculation membrane bioreactor

Abstract

The invention discloses an electric flocculation membrane bioreactor comprising a reactor body, wherein a contact oxidation tank, a settling tank and a membrane biological reaction tank are arranged in the reactor body; a contact oxidation aerator and soft fillers are arranged in the contact oxidation tank, the membrane biological reaction tank is communicated with a filtration membrane group, the membrane extraction water outlet of the filtration membrane group is communicated to a pure water discharge pipe, a sewage input pipe is further arranged on the reactor body, at least one group of positive and negative flocculation electrodes is arranged in the reactor body, and the positive and negative flocculation electrodes are electrically connected with an electric flocculation power supply; the contact oxidation tank, the settling tank and the membrane biological reaction tank are mutually communicated in sequence, and a precipitate return pipe is arranged in the settling tank and / or the membrane biological reaction tank. The electric flocculation membrane bioreactor disclosed by the invention can not only effectively reinforce the aggregation state of activated sludge, but also improve the cell activity of the sludge bacteria, enhance the deoxidation and dephosphorization effects, alleviate the membrane pollution and improve the flux and prolong the service life of the membrane, thereby being capable of being widely applied in treatment of various of sanitary sewage.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to treatment equipment used for marine and land point source domestic sewage such as ships, marine equipment, cities and towns. Background technique [0002] Domestic sewage is the sewage produced in the process of human production, and it is the main source of pollution of water bodies. It mainly includes feces and washing sewage. With the rapid development of social economy and the increase of population, the discharge of domestic sewage is increasing, which has become a serious obstacle to economic development and the improvement of people's quality of life. People are facing the severe test of double water shortage of resources and water quality. The discharge of domestic sewage from land residents such as cities, villages and towns directly affects people's living environment and the degree of water pollution; the discharge of marine engineering equipment and domestic ...

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Problems solved by technology

[0006]Although the membrane bioreactor is the most advanced and efficient sewage treatment method at present, there are still some inherent serious deficiencies: first, the membrane bioreactor (MBR) denitrification Poor phosphorus effect

However, in actual use, the filter membrane in this invention still has the problem of easy pollution, the treatment efficiency of sewage is not high, and the effect of nitrogen and phosphorus removal is not ideal and stable

In view of the shortcomings of this invention, the applicant applied for and obtained the authorized invention patent "continuous circulation membrane bioreactor" (Patent No. 2012105020267) on November 30, 2012. The present invention uses tubular membranes as interception and separation elements. And rationally select the flow rate in the tube membrane, flow velocity, and the relationship between the flow rate in the tube and the amount of permeation, etc., and propose the interception effect of the tube membrane group and the sludge concentration in the cabinet, which reduces the pollution probability of the tube membrane and improves Sewage treatment efficiency, but the effect of nitrogen and phosphorus removal is still far from ideal

[0008] In summary, whether it is a membrane bioreactor with a common structure or a performance-enhanced membrane bioreactor including multiple inventions of the applicant , no breakthrough has been made in stabilizing nitrogen and phosphorus removal effects, improving sludge activity, and preventing membrane fouling. This is not the case for the current increasing requirements for total nitrogen and total phosphorus in effluent water, regardless of the existing biochemical treatment technology and physicochemical treatment technology. , or the relatively advanced membrane bioreactor treatment technology, it is difficult to meet the increasingly stringent discharge water standards

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