Sewage treatment method and electroflocculation membrane bioreactor thereof

Abstract

The invention discloses a sewage treatment method which sequentially includes pre-aeration, contact oxidation, anaerobic precipitation, membrane biological reaction and electroflocculation; the electroflocculation is in the pre-aeration step and / or contact oxidation and / or anaerobic In steps such as oxygen precipitation and / or membrane biological reactions. In the electrocoagulation membrane bioreactor of the present invention, a contact oxidation cabinet, a precipitation cabinet and a membrane bioreactor cabinet are arranged in the reactor body; at least one group of positive and negative flocculation electrodes is arranged in the reactor body; The cabinet and the membrane bioreactor cabinet communicate with each other in sequence, and a sediment return pipe is arranged in the sedimentation cabinet and / or the membrane bioreactor cabinet. The invention can not only effectively enhance the aggregation state of activated sludge, but also improve the activity of sludge cells, have the effect of strengthening and stabilizing deoxidation and dephosphorization, delay membrane pollution, improve membrane flux and service life, and are widely applicable to domestic sewage, In the treatment of industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for domestic sewage from marine and land-based point sources such as ships, marine equipment, cities and towns. The invention also relates to a membrane bioreactor applying the treatment method. 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 ...

AI Technical Summary

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

Images