Treatment of Swine Wastewater Using USCR-ANR Process
A novel USCR-ANR process composed of an up-flow sludge circle reactor (USCR) plus an aerobic nitrification reactor (ANR) was developed to enhance performances of organics and NH3-N removal in swine wastewater.There were two functional zones in the USCR where pH value was adjusted to 8.0-9.0 and MLSS was maintained over 10,000 mg/L.One rune was the acidogenic zone used for hydrolytic acidification to generate short chain fatty acids (SCFAs) from organics in sludge and influent wastewater by means of hydrolysis and acidification for solving the problem of poor carbon source in swine wastewater and the other was the denitrification zone.The results showed that when influent COD was about 3,700 mg/L., HRT was 28 h, and reflux ratio was 6 Q, average removal rate of COD, NH3-N and TN were 92%, 95% and 62%, respectively.And when influent COD was about 5,670 mg/L, HRT was 48h, and refluxratio was 8 Q, average removal rate of COD, NH3-N and TN were 92%, 95% and 64%, respectively.Moreover, wastewater biodegradability was obviously improved because average BOD5 to COD ratio increased from 0.51 in influent to 0.71 in acidogenie zone of USCR.The amount of SCFAs in acidogenic rune was greatly higher than that in influent and the amount of SCFAs in effluent of USCR was relatively low, which indicated that SCFAs could be produced in acidogenie zone and well consumed as the preferred carbon resource of denitrification.
Swine wastewater USCR-ANR SCFAs COD NH3-N TN
Jie Zhang Weiwei Zhao Guoji Ding Linli Cheng Min Liu Shan Li Mengnan Hu Zheng Jiao
College of Environmental Science and Engineering,Tongji University College of Environment and chemical engineering,Shanghai University
国际会议
浙江嘉兴
英文
193-199
2013-10-24（万方平台首次上网日期，不代表论文的发表时间）