Bio-reduction of nitrate from groundwater using a hydrogen-based membrane biofilm reactor

作     者：Siqing Xia Fohua Zhong Yanhao Zhang Haixiang Li Xin Yang 

作者机构：State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China College of Municipal and Environmental Engineering Shadong Jianzhu University Jinan 250101 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2010年第22卷第2期

页      面：257-262页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：supported by the National Natural Science Foundation of China (No.50978190) the National High Technology Research and Development Program (863) of China (No.2009AA062902) 

主　　题：hydrogen-based membrane biofilm reactor autotrophic denitrification nitrate groundwater 

摘      要：A hydrogen-based membrane biofilm reactor （MBfR） using H2 as electron donor was investigated to remove nitrate from groundwater. When nitrate was first introduced to the MBfR, denitrification took place on the shell side of the membranes immediately, and the effluent concentration of nitrate continuously decreased with 100% removal rate on day 45 under the influent nitrate concentration of 5 mg NO3^--N/L, which described the acclimating and enriching process of autohydrogenotrophic denitrification bacteria. A series of short-term experiments were applied to investigate the effects of hydrogen pressures and nitrate loadings on deniWification. The results showed that nitrate reduction rate improved as H2 pressure increasing, and over 97% of total nitrogen removal rate was achieved when the nitrate loading increased from 0.17 to 0.34 g NO3^--N/（m^***） without nitrite accumulation. The maximum deniwification rate was 384 g N/（m^***）. Partial sulfate reduction, which occurred in parallel to nitrate reduction, was inhibited by denitrififcation due to the competition for H2. This research showed that MBfR is effective for removing nitrate from the contaminated groundwater.