Precise control method of sewage treatment plant aeration total quantity

Abstract

The invention relates to a precise control method of sewage treatment plant aeration total quantity. The method includes: a water inlet COD instrument, a water inlet ammonia nitrogen online monitor, a water inlet flowmeter, a dissolved oxygen online monitor, a water outlet ammonia nitrogen online monitor, a central PLC and a plurality of blowers are disposed, the water inlet COD instrument, the water inlet ammonia nitrogen online monitor, the water inlet flowmeter and the dissolved oxygen online monitor are parallelly connected with the water outlet ammonia nitrogen online monitor and then connected with the central PLC, and the central PLC is connected with the blowers; the central PLC respectively collects four kinds of variable signals of water outlet ammonia nitrogen, DO values, water inlet COD and ammonia nitrogen, and water inlet quantity, the four kinds of variable signals are different in significance and are associated, the various signals have independent adjusting periods, and a precise control system using the central PLC to control and adjust the total air quantity of the blowers is formed. The method has the advantages that aeration quantity is saved, influence of the faults or measuring errors of a single instrument to a system judging result is weakened greatly, and stable operation of the whole system is guaranteed.

Description

technical field [0001] The invention belongs to a sewage treatment system, in particular to a method for precisely controlling the total amount of aeration in a sewage treatment plant. Background technique [0002] Generally speaking, the sewage treatment process of sewage treatment plants is divided into three steps: pretreatment (primary treatment, physical treatment): mainly refers to the removal of large particle size substances and part of organic substances, such as leaves, plastic bags in water , sand, etc., generally use the grill room (coarse and fine), grit chamber, sedimentation tank. Secondary treatment (main process): Secondary treatment area: the core area of ​​the sewage treatment process and the area with the largest amount of pollutant removal. The blower supplies oxygen to the aeration tank, and the activated sludge in the aeration tank passes through anaerobic, The process of anoxic and aerobic will greatly remove COD, BOD, SS, ammonia nitrogen, TN, and T...

AI Technical Summary

Problems solved by technology

It can not only effectively solve the problems of arbitrariness and low adjustment frequency during manual process adjustment; at the same time, it also solves the problem that the existing automatic adjustment system relies too much on the accuracy of online instruments, it is difficult to take care of all influencing factors, and the ability to adapt to changes in water quality and quantity Poor and adjustment too lagging

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