Biofilm culturing method of biofilm reactor with nitrogen and phosphorus removal function

Abstract

The invention discloses a biofilm culturing method of a biofilm reactor with denitrification and dephosphorization functions, which comprises the following steps: inoculating activated sludge with denitrification and dephosphorization functions into the biofilm reactor loaded with biological filler, introducing industrial sewage into the reactor, and carrying out biofilm culturing in an anaerobic and aerobic alternate manner, free amino acids are added in the aerobic reaction process, sugar ester substances are firstly added in the anaerobic reaction process, and quaternary ammonium base is added when dissolved oxygen is reduced to 0.1 mg / L or below. According to the method disclosed by the invention, the growth condition of microorganisms on the filler is good, rapid biofilm formation growth of nitrifying bacteria and denitrifying phosphorus-accumulating bacteria is realized, the starting period is short, a biofilm is not easy to fall off, and the effect that the biofilm reactor stably achieves the deep nitrogen and phosphorus removal effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a membrane-hanging cultivation method in a biofilm reactor with the functions of denitrification and dephosphorization. Background technique [0002] The biofilm method refers to the formation of a layer of biofilm by the microorganisms in the sewage treatment attached or fixed on the surface of the biological filler, and the microorganisms in the biofilm degrade harmful components such as organic matter and nitrogen-containing pollutants. The biofilm method has been widely used in the treatment of domestic sewage and industrial wastewater due to its stable operation, less residual sludge, simple management, strong ability to remove ammonia nitrogen and refractory pollutants, and adaptability to a wide range of water quality changes. According to different operation modes, it can be divided into biological filter, biological turntable, biological contact...

AI Technical Summary

Problems solved by technology

CN105565480A discloses a film-hanging method for carrier filler in a moving bed biofilm reactor. By simultaneously draining and replenishing the separated waste water to the moving bed biofilm reactor, dynamic cultivation is carried out, and the activated sludge is refluxed. This method requires monitoring Sludge concentration, inconvenient operation

CN106542655A discloses a method for fast film-forming of high-efficiency denitrification microbial bacterial agents. The method uses an aerobic nitrification reactor to form film, which can solve the problems of long time for denitrification microbial film-forming, poor adhesion, complicated operation, low biomass, and impact resistance. The defect of load difference can increase the fixation amount of nitrifying bacteria, and the film-hanging speed is fast, which can enhance the ability to resist changes in the external environment and the ability to resist impact loads

However, it does not involve the proliferation and film formation of aerobic bacteria, and its application to sewage treatment containing ammonia nitrogen and phosphorus pollutants will be limited.