Abstract
The research takes low C/N ratio sewage as the research object, and quickly realizes the accumulation of nitrite nitrogen by adding inhibitors into the SBBR reactor, and realizes the nitrogen removal by anaerobic ammonia oxidation in the reactor. Determining the optimal operating parameters is of farreaching significance for the treatment of wastewater with high ammonia nitrogen and low C/N and achieving economical and efficient nitrogen removal. Control the ammonia oxidation reaction, keep the nitrification process in the nitrosation stage, and realize the rapid accumulation of NO2--N is the problem that the reactor needs to solve. This experiment uses a combination of batch test and periodic test to conduct experimental research on various influencing factors in the partial nitrosation process: temperature, pH, DO and find the best operating conditions to achieve high-efficiency accumulation of NO2--N and optimize the reaction conditions.
Highlights
SBBR (Sequencing batch biofilm reactor) is a biological denitrification process developed on the basis of the SBR process
The filler has a certain effect on the treatment effect of the SBBR reactor, and PU sponge is used as a filler [2]
The test results show that the pH value has an important influence on the nitrosation reaction, and controlling the pH between 7.5 and 8.0 in an alkaline environment is conducive to the realization of the nitrosation reaction [5]
Summary
SBBR (Sequencing batch biofilm reactor) is a biological denitrification process developed on the basis of the SBR process. The activated sludge method and the biofilm method are organically combined with different fillers in the reactor as the growth environment for microorganisms. The filler has a certain effect on the treatment effect of the SBBR reactor, and PU sponge is used as a filler [2]. This research takes SBBR process as the main body and polyurethane sponge as the filler. R1 uses sodium chlorate inhibitor for culture and R2 uses traditional culture methods to domesticate the sludge which is contrasted with R1. Through experimental research on various influencing factors in the nitrosation process: temperature, pH and DO, the optimal reaction conditions are found to provide theoretical support for optimizing the reaction device.
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