Membrane bioreactor sludge reduction sewage treatment technology

Abstract

The invention discloses a membrane bioreactor sludge reduction sewage treatment technology. The technology comprises the following steps that inorganic particles are removed for sewage in an aerated grit chamber, and the treated sewage passes through an anoxic reaction chamber, an anaerobic reaction chamber, a pre-aerobic reaction chamber and a membrane bio-reactor (MBR) in sequence, wherein part of mixed liquor in the pre-aerobic reaction chamber flows back to the anaerobic reaction phase, the other part of the mixed liquor enters the membrane bio-reactor (MBR) for mud-water separation, separated clear water is discharged, and remained activated sludge flows back to the anoxic reaction chamber. According to the membrane bioreactor sludge reduction sewage treatment technology, exogenous preparations such as enzymic preparations, chemical uncoupler and oxidant do not need to be added, a specified sludge treatment system is not needed at the rear stage of the technology, and secondary pollution of sludge landfilling, incineration, heat treatment and the like to environment is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a membrane bioreactor sludge reduction sewage treatment technology. Background technique [0002] With the rapid development of urbanization and industrialization in our country, the corresponding amount of sewage discharge increases, and the amount of residual sludge generated in the process of sewage treatment is also increasing day by day, and increases at a rate of 10%-15% per year, and sludge pollution is also increasing. It is getting more and more serious, the cost of sludge treatment and disposal is high, and the problem is prominent. A large amount of surplus sludge has become a new source of environmental pollution. [0003] With the rapid urbanization process, the sludge treatment load has increased dramatically. According to the content of the "Twelfth Five-Year Plan", by 2015, my country's daily sewage treatment capacity will reach 208 million cubic meters,...

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Problems solved by technology

[0005] Due to the low content of organic matter in sludge in my country, the promotion of sludge anaerobic digestion technology is limited; my country lacks sludge incineration tail gas emission standards and problems such as incineration investment, energy consumption, and secondary pollution, making sludge heat treatment technology unaffected. After sludge dehydration, the whereabouts of mud cake and the sales of composted products are also bottlenecks that are difficult to promote for various technologies

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