Organic Carbon and Nitrogen Removal from Nylon-6 Wastewater Using an A/O1/O2 Biofilm System
The aerobic reactor of A/O process was separated into two segments and each of them was installed with conjugate fibre packing, which was formed into an A/O1/O2 biofilm system. In the A/O1/O2 biofilm system, organic carbon degradation and nitrogen removal from nylon-6 wastewater in each reactor were investigated. Furthermore, infrared spectroscopy was selected for analyzing substrates decomposition. Results showed that good performance of the A/O1/O2 biofilm system was achieved and average removal efficiencies of COD, NH4 +-N and TN were 93%, 85% and 59%, respectively. When organic loadings varied from 1.64 kg·m-3·d-1 to 4.61 kg·m-3·d-1, different removal variations of COD, NH4 +-N and TN were obtained in reactors A, O1 and O2. As for COD removal, average contribution ratios of reactors A, O1 and O2 were 63%, 30% and 4%, respectively. Referring to NH4 +-N removal, average contribution ratios of reactors O1 and O2 were 24% and 76%. And regarding TN removal, average contribution percentages of reactor A, O1 and O2 were 75%, 20% and 4%, respectively. Investigation on the infrared spectroscopy of each wastewater sample demonstrated that in the progress of substrates degradation, the contents of amino acid, the amide and aliphatic compounds decreased, but the contents of NH4 +, NO3 -, HCO3-and carbohydrate increased.
nylon-6 wastewater biofilms biodegradation autotrophs heterotrophs substrate inhibition
LIU Guohua LIU Fang CHEN Jihua
College of Environmental Science and Engineering,Donghua University,Shanghai 200051,China College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266555,Shandong,
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1756-1764
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）