Nitrosobacterium-anaerobic ammonium oxidizing bacteria immobilization and middle-temperature sewage treatment process

Abstract

The invention relates to a technique of nitrococcus and anaerobic ammonium-oxidation bacteria immobilization and mesothermal sewage treatment, which consists of nitrococcus immobilization technique and anaerobic ammonium-oxidation bacteria immobilization technique and combination of the two techniques is realized in an anaerobic baffled reactor under the condition of 20 to 25 DEG C. Concentration of nitrogen of the inlet sewage is below 100mg L<-1>; nitrite is produced during the middle part by nitrosoation reaction; the rest ammonia is carried out the anaerobic ammonium-oxidation reaction with the nitrite that the nitrogen is produced to get out of the system to ensure the nitrogen in the sewage be high efficiently removed in the mesothermal condition.The invention has the advantages that: (1) environment of vector is in favor of proliferation of biological cell, which can raise the concentration of microbiology which participate reaction to enhance reaction efficiency; (2) under the situation of no consumption of organic carbon source and acid-bases neutralizer as well as decrease of oxygen consumption, biological nitrogen removal can be realized and sewage treatment temperature is lowered to 20 to 25 DEG C, which has great energy-saving benefit.

Description

(1) Technical field [0001] The invention relates to a biological denitrification sewage treatment process, in particular to a process for immobilizing nitrosating bacteria-anammox bacteria and medium temperature (20-25° C.) sewage treatment. (2) Background technology [0002] As early as 1975, Voet discovered the phenomenon of nitrite accumulation in the nitrification process and first proposed the short cut nitrificationdenitrification (SHARON) mechanism, which can also be called incomplete or simple nitrification-denitrification Biological denitrification, the method is to control the nitrification process to HNO 2 stage, followed by denitrification. The SHARON process is a new denitrification process developed by the Delft University of Technology in the Netherlands. Its basic principle is simple nitrification-denitrification, that is, the ammonia nitrogen oxidation is controlled in the nitrosation stage, and then the nitrite is denitrified, namely: NH 4 + →NO 2 - →N...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the above-mentioned technical problems and provide a process for the immobilization of nitrosating bacteria-anammox bacteria and medium-temperature sewage treatment, which can be used without consuming organic carbon sources, acid-base neutralizers, and reducing oxygen. The biological denitrification of wastewater can be realized under the condition of low consumption. Compared with the existing SHARON-ANAMMOX process, the present invention reduces the sewage treatment temperature to 20-25°C, which has huge energy-saving benefits and is more suitable for the sewage treatment environment in my country. high application value