Performance of sulfate-dependent anaerobic ammonium oxidation  

作　　者：ZHANG Lei ZHENG Ping HE YuHui JIN RenCun 

机构地区：[1]Department of Environmental Engineering,Zhejiang University,Hangzhou 310029,China

出　　处：《Science China Chemistry》2009年第1期86-92,共7页中国科学（化学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 30770039);the High-tech Research and Development Program of China (Grant No. 2006AA06Z332)

摘　　要：The performance of sulfate-dependent anaerobic ammonium oxidation was studied.The results showed that both SO42-and NH4+ were chemically stable under anaerobic conditions.They did not react with each other in the absence of biological catalyst(sludge).The anaerobic digested sludge cultivated in an anaerobic reactor for three years took on the ability of oxidizing ammonium with sulfate anaero-bically.The average reduction of sulfate and ammonium was 71.67 mg.L-1 and 56.82 mg.L-1 at high concentrations.The reaction between SO42-and NH4+ was difficult,though feasible,due to its low standard Gibbs free energy change.The experiment demonstrated that high substrate concentrations and low oxidation-reduction potential(ORP) may be favourable for the biological reaction.The performance of sulfate-dependent anaerobic ammonium oxidation was studied. The results showed that both SO4 2? and NH4 + were chemically stable under anaerobic conditions. They did not react with each other in the absence of biological catalyst (sludge). The anaerobic digested sludge cultivated in an anaerobic reactor for three years took on the ability of oxidizing ammonium with sulfate anaerobically. The average reduction of sulfate and ammonium was 71.67 mg·L?1 and 56.82 mg·L?1 at high concentrations. The reaction between SO4 2? and NH4 + was difficult, though feasible, due to its low standard Gibbs free energy change. The experiment demonstrated that high substrate concentrations and low oxidation-reduction potential (ORP) may be favourable for the biological reaction.

关 键 词：ANAEROBIC AMMONIUM OXIDATION SULFATE AUTOTROPH 

分 类 号：X703[环境科学与工程—环境工程]