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

Abstract

The invention relates to a sewage treatment equipment and method based on in-situ control of biofilm thickness, wherein the device includes a water inlet pool, a water inlet pump, a reactor and a water outlet valve connected in sequence, and a bubble-free aeration membrane is arranged in the reactor, and the equipment also It includes a gas pressure regulating valve for adjusting the oxygen partial pressure and dissolved oxygen concentration in the membrane. One end of the gas pressure regulating valve is connected to the air compressor, and the other end is connected to each bubble-free aeration membrane through the inlet pipe assembly; for the reactor After sludge inoculation, the wastewater containing high ammonia nitrogen pre-adjusts the pH value and then enters the reactor. By adjusting the oxygen partial pressure and dissolved oxygen concentration in the membrane in the reactor, after the biofilm is formed on the surface of the bubble-free aeration membrane, the oxygen pollution bottom The substances in the biofilm diffuse and transfer in the opposite direction, and the nitrification and denitrification are carried out simultaneously. Compared with the prior art, the invention reduces the requirement of the electron donor, the membrane device occupies a small area, reduces the cost of sewage treatment, and realizes the low-carbonization of sewage treatment.

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...

AI Technical Summary

Problems solved by technology

The two-stage short-cut nitrification and denitrification process still has problems such as long process flow, unstable operation and treatment effects, and complicated control and management.

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