Sewage disposal and circling reclamation method

Abstract

The invention relates to a method of sewage treatment and recycling usage. The method comprises the following steps: sewage passes through a comprehensive adjusting pond, a microbial bioreactor, a bacterial sludge rapid separation return device, a secondary sedimentation tank and a rapid filter in sequence; clean water obtained after passing through the rapid filter enters a clean water basin, and then is fed back to a production workshop for reuse by a water pump; sludge deposited in the bacterial sludge rapid separation return device enters into the microbial bioreactor through a sludge return pipe; sludge deposited in the secondary sedimentation tank enters a sludge sump through a pipeline, and sludge in the rapid filter enters into the sludge sump though the pipeline; when the SVI of the microbial bioreactor is between 50 to 100, the sludge collected by the sludge sump is fed to the microbial bioreactor through the pipeline; when the SVI of the microbial bioreactor is more than and equal to 200, the collected by the sludge sump is sent to a sludge digester through the pipeline; and sludge in the sludge digester is fed back to the comprehensive adjusting pond through the pipeline. The method has the advantages of less discharge amount of the sludge and higher activation and the quantities of microorganism in the comprehensive adjusting pond and the microbial bioreactor.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for sewage treatment and recycling. Background technique [0002] At present, the A / O process (anaerobic + aerobic) is widely used in wastewater treatment. The A / O biological treatment process is a sewage biological treatment system composed of anaerobic and aerobic two-part reactions. After the sewage enters the anaerobic tank, under anaerobic conditions, the organic matter in the wastewater is treated by the action of anaerobic microorganisms, mainly anaerobic bacteria. The hydrogen acceptor in the process is not free oxygen, but organic substances or oxygen-containing compounds, such as SO 4 2- , NO 3 - , NO 2 - , CO 2 Wait. Therefore, the final metabolite is not simply CO 2 and H 2 O, but some low molecular organic compounds, CH 4 , H 2 S, NH 4 + Wait. The anaerobic process mainly relies on the three major groups of bacteria, namely, the join...

AI Technical Summary

Problems solved by technology

Returning the sludge from the secondary settling tank into the aeration reaction tank has the following disadvantages: (1) aerobic microorganisms die in the anaerobic state, and the concentration of aerobic microorganisms in the returned secondary settling sludge is low; (2) the surviving The activity of aerobic microorganisms is inhibited in the anaerobic state, and the secondary sedimentation sludge with low activity is refluxed into the aeration tank, and the return flow into the aeration tank leads to a decrease in the treatment rate

(3) Active microorganisms undergo alternate processes of aerobic (aeration tank) and anoxic (secondary sedimentation tank), and cannot be in an aerobic state all the time, and the treatment capacity of aerobic microorganisms cannot be fully utilized

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