Deep purification of low-strength ammonium wastewater with ANRE process

摘要：

　　In order to treat low-strength ammonium wastewater (~7.5 mg/L NH4+-N),an Advanced Nitrogen REmoval (ANRE) process was developed based on anaerobic ammonium oxidation (ANAMMOX).The results showed that ANRE process was high-efficient with nitrogen removal rate (NRR) of 0.40 kg/(m3·d).The substrate removal efficiency was up to 97 %.The effluent ammonium and nitrite concentration were less than 1 mg/L,which met the environmental quality standards for class Ⅲ surface water (GB3838-2002,CHINA).Kinetic analysis indicated that the maximum specific utilization rates for ammonium and nitrite were 46.40 mg/(g VSS·d) and 121.56 mg/(g VSS·d) and the half-saturation constants were 0.25 mg/L and 0.96 mg/L,respectively.To our surprise,the kinetic parameters of ammonium and nitrite in ANRE process went by contraries to those in normal ANAMMOX process.The anammox granular sludge gradually disaggregated due to the lack of energy and the consumption of extracellular polymeric substances (EPS).In addition,the ANaerobic Ammonium Oxidation Bacteria (AnAOB) were found in the state of starvation.The substrate distribution between energy production and the cellular synthesis was observed changed,leading to less nitrogen production and more nitrate accumulation.

关键词： ANAMMOX Advanced nitrogen removal (ANRE) Low-strength ammonium wastewater Reactor performance Granular characteristics

作者: Da Kang Qian-Yi Hu Meng Zhang A-Qiang Ding Ru Wang Hui-Feng Lu Hui-Jie Lu Ghulam Abbas Ping Zheng

作者单位: Department of Environmental Engineering, Zhejiang University, Hangzhou, China

会议类型: 国际会议

会议名称: The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)

会议地点: 北京

会议语种:英文

页码: 203-205

在线出版日期: 2017-10-17（万方平台首次上网日期，不代表论文的发表时间）