Rapid biofilm forming method of biofilm reactor

Abstract

The invention relates to a rapid biofilm forming method of a biofilm reactor. The method comprises the following steps: inoculating aerobic activated sludge into a reactor loading a biological filler,carrying out biofilm forming culture by using industrial sewage under aerobic conditions, and adding an organic carbon source and humus in the culturing process; and when the concentration of the effluent sludge is basically stable and unchanged, inoculating anaerobic activated sludge into the reactor, transferring into an anaerobic condition, carrying out biofilm forming culture, and adding sugar alcohol compounds and humus in the culturing process. According to the method, the anaerobic bacteria can be rapidly proliferated in the reactor, the biofilm forming speed is high, the starting period is short, the biofilm is not prone to falling off, and it is guaranteed that the biofilm reactor stably achieves the deep denitrification effect.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method for rapid film formation of a biofilm reactor. 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 oxidation method and biological fluidized bed, etc. Although t...

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, the ammonia nitrogen removal rate of the biofilm described in this method is greater than or equal to 95%, which is suitable for treating sewage containing ammonia nitrogen pollutants, and does not involve the treatment effect of total nitrogen.