Sewage treatment equipment based on in-situ control of biofilm thickness, and control method of sewage treatment equipment

Abstract

The invention relates to sewage treatment equipment based on in-situ control of biofilm thickness, and a control method of the sewage treatment equipment. The equipment comprises a water inlet tank, a water feed pump, a reactor and a water outlet valve which are sequentially connected, wherein a non-foam aeration membrane is arranged in the reactor; the equipment further comprises a gas pressure regulating valve for adjusting the oxygen partial pressure and the dissolved oxygen concentration in the membrane; one end of the gas pressure regulating valve is connected with an air compressor, and the other end of the gas pressure regulating valve is connected with the non-foam aeration membrane by means of an intake pipe assembly; after sludge is inoculated into the reactor, the pH value of wastewater is adjusted in advance, and the wastewater containing high ammonia nitrogen enters the reactor; by adjusting the oxygen partial pressure and dissolved oxygen concentration in the membrane of the reactor, a oxygen-contaminated substrate is diffused and transmitted in the opposite direction in the biofilm after the biofilm is formed on the surface of the non-foam aeration membrane, and nitrification and denitrification are carried out synchronously. Compared with the prior art, the sewage treatment equipment reduces the demand of an electronic donor, the membrane device occupies a small area, the cost of sewage treatment is lowered, and low-carbon sewage treatment is realized.

Description

technical field

[0001] The invention relates to the technical fields of environmental protection, water treatment technology and equipment, in particular to a sewage treatment equipment and method based on in-situ control of biofilm thickness. Background technique

[0002] In the general sewage treatment process, blast air bubble aeration or surface aeration is often used, which not only consumes a lot of energy, but also causes volatile organic pollutants to enter the atmosphere with the air bubbles and cause environmental pollution. The traditional sewage denitrification process is realized through two stages of nitrification and denitrification, respectively by nitrifying bacteria and denitrifying bacteria in different reactors (segmented in space), or in the same reactor in different time periods The removal of nitrogen through the alternation of aerobic and anaerobic environments has the advantages of long process flow, the need for mixed liquid reflux, high energy cons...

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