Method for treating biological sewage

Abstract

The invention provides a method for treating biological sewage. An A (Anaerobic)-O(Oxic)-A(Anoxic) process is established in an application of treating heavy loaded sewage. A set of net cloth which is used as a micro-culture condition of a biofilter is arranged in a back section of an anaerobic area and an oxic area and an anoxic area. When the original sewage enters into an anaerobic groove together with a secondary treating sludge containing returned phosphor deposited and discharged from an anaerobic pool, a set of a device having the functions of straight-flow biological contact oxidation and filtering film is arranged at the position of a front section of one third groove in the oxic area which is behind the anaerobic area and a set of net cloth is arranged at the position of a back section of one third groove, wherein the net cloth is used as the micro-culture condition of the biofilter in the oxic section. The settled activated sludge and the deactivated sludge which pass through the micro-culture condition of the biofilter in an anoxic groove are flowed back to the front anaerobic pool. The methane is imported to the anoxic groove from the front anaerobic groove. Water is guided into an air supporting pool from the back section of the anoxic pool. A set of nanometer air supporting device is arranged in the pool in order to filter and deodorize the water from the back section.

Description

Technical field: [0001] The invention relates to sewage treatment technology, in particular to a treatment method for reducing sludge and shortening water treatment time in the process of sewage treatment. Background technique: [0002] At present, a section of A(Anaerobic)-O(Oxic)-A(Anoxic) anaerobic-aerobic-anoxic process is established in the heavy-duty sewage treatment. In the traditional sewage treatment process, the sewage biological treatment method is used to remove the Dissolved and suspended organic matter is transformed into sludge and volatile gas. When the sewage is separated, a lot of excess sludge will be produced. At the same time, necessary treatment should be carried out for these sludge, but the disposal cost often accounts for 60% of the operating cost of the sewage treatment plant. Moreover, the traditional sewage treatment method requires more equipment, cumbersome operation, inconvenient management, high cost and treatment cost, and low efficiency. I...

AI Technical Summary

Problems solved by technology

[0002] At present, a section of A(Anaerobic)-O(Oxic)-A(Anoxic) anaerobic-aerobic-anoxic process is established in the heavy-duty sewage treatment. In the traditional sewage treatment process, the sewage biological treatment method is used to remove the Dissolved and suspended organic matter is transformed into sludge and volatile gas. When the sewage is separated, a lot of excess sludge will be produced. At the same time, necessary treatment should be carried out for these sludge, but the disposal cost often accounts for 60% of the operating cost of the sewage treatment plant. Moreover, the traditional sewage treatment method requires more equipment, cumbersome operation, inconvenient management, high cost and treatment cost, and low efficiency.

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