Induce of Granular activated carbon on partial nitrification granular sludge
LI Dong1, JIANG Sha-sha1, ZHANG Jin-ku1, ZHANG Jie1,2
1. Key Laboratory of Beijing For Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 10024, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
Two column-type SBRs were used to investigate the influence caused by granular activated carbon (GAC) on the formation of partial nitrification granular sludge treating domestic sewage. There was not GAC in R2 reactor, but R1reactor had GAC added to the sludge mixture. R1reactor was successfully started-up in 22th day, while R2 reactor was started-up in 38th day. At the beginning of the particle formation, the results showed that GAC could be used as the cores, reducing the initial particle formation time. At the same time, in the whole running stage, EPS content of R1reacor, especially the content of PN, was significantly higher than that of R2 reactor, which further promoted the formation of partial nitrification granular sludge. In addition, the ammonia oxidation rate and the nitrite accumulation rate of R1reactor were higher than of R2reactor, and had small fluctuation, which showed that the dosing of GAC helped maintain the stability of partial nitrification granular sludge treatment effect.
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