Five-factor wastewater treating apparatus

Abstract

The invention relates to a wastewater treatment device with five factors being adjustable, which is the improved device for A / A / O wastewater treatment process. It mainly comprises primary sedimentation pool, anaerobic pool, anoxic pond, aerobic pool and secondary sedimentation tank. It is characterized in that: among anaerobic, anoxic and aerobic pool, there is a movable partition wall; a controllable valve and reflux pump with adjustable flow rate are fixed on return conduit inside wastewater from aerobic pool to anaerobic pond and anoxic pond as well as return conduit outside sludge from secondary sedimentation pool to anaerobic pool and anoxic pond; and phosphate nitrate and dissolved oxygen detection head and a are set in said three pools. The five factors of sludge age, dissolved oxygen concentration in aerobic pool, carbon amount, proportion of pool size among said three pools and rate between inside return and outside return can be adjusted timely, which can optimize effect of biological removal of nitrogen and phosphorus and improve wastewater treatment quality.

Description

technical field [0001] The technical invention is a sewage treatment device, in particular a device for improving the technology of A / A / O sewage treatment technology. Background technique [0002] With the rapid development of economy and urbanization, my country is facing increasingly serious problems of water pollution and water resource shortage. In water pollution, the problem of water body eutrophication caused by the enrichment of nitrogen and phosphorus nutrients has become increasingly prominent. At present, the A / A / O sewage treatment process is the most basic biological nitrogen and phosphorus removal process, which solves the problem of nitrogen and phosphorus removal in sewage to a certain extent. However, the effluent quality of the traditional A / A / O process is not high, and it is especially difficult to achieve efficient nitrogen and phosphorus removal at the same time. In practice, we found that there are some difficult problems in the existing A / A / O sewage tr...

AI Technical Summary

Problems solved by technology

However, the effluent quality of the traditional A / A / O process is not high, especially difficult to achieve efficient nitrogen and phosphorus removal at the same time

In practice, we found that there are some difficult problems in the existing A / A / O sewage treatment process: 1. The problem of sludge age, the nitrification process and phosphorus removal are contradictory, and the growth and reproduction of nitrifying bacteria need a long enough period of time. 2. The intensity of aeration in the aerobic tank is the concentration of dissolved oxygen. The nitrification process in the aerobic tank requires a high concentration of dissolved oxygen, and the process of sewage treatment It is also necessary to return part of the sewage from the aerobic pool to the anaerobic pool and the anoxic pool, which is the so-called internal backflow.

The above five problems make the current A / A / O sewage treatment process unable to meet the needs of different regions, different sewage, different temperatures and frequently changing sewage treatment processes

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