Membrane aeration biomembrane process and apparatus for sewerage short-cut denitrification

Abstract

The invention belongs to the field of environmental protection and sewage treatment technology and equipment, and in particular relates to membrane aeration biomembrane technology and a membrane aeration biomembrane device for short-range denitrogenation of sewage. The membrane aeration biomembrane technology mainly utilizes an ammonia oxidation bacterium biomembrane grown on the surface of an aeration membrane to complete nitrosation of ammonia nitrogen, controls oxidation of the ammonia nitrogen in the nitrosation state, and utilizes a denitrifying biomembrane to complete the process of short-range denitrogenation. After the pH is adjusted, high ammonia nitrogen wastewater is added into a membrane aeration biomembrane reactor through an intake pump and flows into a denitrifying biomembrane reactor, and simultaneously full contact of a mixed solution in a system and the biomembrane is realized by utilization of a mixed solution circulating pump. Under the condition of stable operation, dissolved oxygen in the mixed solution in the system is controlled to be less than 0.1 milligram per liter. The membrane aeration biomembrane technology and the membrane aeration biomembrane device have the characteristics of simple and quick technique, high and stable denitrogenation efficiency, strong impact load resistance, low energy consumption, low operating cost, small sludge output and so on.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection, water treatment technology and equipment, and specifically relates to a membrane aeration biofilm treatment process and a device thereof for sewage denitrification treatment. Background technique [0002] 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 , nitrogen removal is achieved by alternating aerobic and anaerobic environments. The main disadvantages of the traditional nitrification and denitrification denitrification process are: the process is long, the mixed liquid needs to be refluxed, the energy consumption is large, the sludge generated is large, the area is large, and the capital investment is high. If the denitrification stage carbon If the sourc...

AI Technical Summary

Problems solved by technology

The main disadvantages of the traditional nitrification and denitrification denitrification process are: the process is long, the mixed liquid needs to be refluxed, the energy consumption is large, the sludge generated is large, the area is large, and the capital investment is high. If the denitrification stage carbon Insufficient carbon source, additional carbon source organic matter needs to be added

However, the initiation and control of the partial nitritation process of membrane aerated biofilm is not yet clear, so it is difficult to achieve stable nitrification performance, and the nitrite produced is likely to inhibit microbial activity when the concentration is high

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