Sludge disintegration by ozonation for the production of carbon source for low C/N wastewater treatment
This paper studied excess sludge was disintegated by ozonation oxidation and solubilized organic substances from the excess sludge was used as carbon source for denitrification in an A/O system. The mechanism of sludge ozonation process was investigated. At less than 0.04gO3/gTSS, the bacteria began to be broken down. Greater than 0.04 gO3/g TSS, ozone was used to oxidize the bio-macromolecules released from the sludge into small molecules. At levels higher than 0.24 g O3/g TSS, the small organic molecular was oxidized by ozone. When the optimal ozone dose of 0.2gO3/gSS, the concentration of COD, BOD, NH3-N and TN in the supernatant increased by 1256.3%, 3210.1%, 232.1%, 241.5% and 275.4% respectively. At C/N=8, the A/O system had high nitrogen removal efficiency. When C/N became Lower, the nitrogen removal efficiency of the A/O systeM decreaced remarkably. The soluble carbon in supernatant increased by ozoneation oxidation was recirculated back to the A/O system with alkalinity adjusted, which could enhance the TN removal efficiency by 30%.
ozonation ozidation sludge A/O system low C/N wastewater
ShuoYang Qun-hui Wang Peng Li Chuan-fu Wu
Civil & Environment Engineering School, University of Science and Technology Beijing, Beijing 100083
国际会议
2009 Beijing International Environmental Technology Conference(2009北京国际环境技术会议暨第五届“中、德、波环境技术研讨会)
北京
英文
447-456
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）