Sustainable treatment of nitrate-containing wastewater by an autotrophic hydrogen-oxidizing bacterium

作     者：Yi-Zhen Chen Li-Juan Zhang Ling-Yun Ding Yao-Yu Zhang Xi-Song Wang Xue-Jiao Qiao Bao-Zhu Pan Zhi-Wu Wang Nan Xu Hu-Chun Tao 

作者机构：Key Laboratory for Heavy Metal Pollution Control and ReutilizationSchool of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen518055GuangdongChina College of Health Science and Environmental EngineeringShenzhen Technology UniversityShenzhen518118GuangdongChina State Key Laboratory of Eco-hydraulic in Northwest Arid Region of ChinaXi'an University of TechnologyXi'an710048ShaanxiChina Department of Civil and Environmental EngineeringVirginia Polytechnic Institute and State UniversityManassas20147VirginiaUSA 

出 版 物：《Environmental Science and Ecotechnology》 (环境科学与生态技术（英文）)

年 卷 期：2022年第9卷第1期

页      面：53-59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] 

基　　金：the Shenzhen Fundamental Research Programs(JCYJ20180503182122539,JCYJ20180503182130795,and GXWD20201231165807007-20200810165349001) the National Natural Science Foundation of China(51939009) 

主　　题：Wastewater Nitrate Hydrogen-oxidizing bacteria Autotrophic assimilation Aerobic denitrification 

摘      要：Bacteria are key denitrifiers in the reduction of nitrate(NO_(3)^(-)N),which is a contaminant in wastewater treatment plants(WWTPs).They can also produce carbon dioxide(CO_(2))and nitrous oxide(N2O).In this study,the autotrophic hydrogen-oxidizing bacterium Rhodoblastus ***_(2)0 was isolated for sustainable treatment of NO_(3)^(-)N in *** removal of NO_(3)^(-)N and recovery of biomass nitrogen were *** to 99%of NO_(3)^(-)N was removed without accumulation of nitrite and N2O,consuming CO_(2)of 3.25 mol for each mole of NO_(3)^(-)N *** overall removal rate of NO_(3)^(-)N reached 1.1 mg L^(-1)h^(-1)with a biomass content of approximately 0.71 g L^(-1)within 72 ***20 participated in NO_(3)^(-)N assimilation and aerobic *** from 15N-labeled-nitrate test indicated that removed NO_(3)^(-)N was assimilated into organic nitrogen,showing an assimilation efficiency of 58%.Seventeen amino acids were detected,accounting for 43%of the *** loss through aerobic denitrification was only approximately 42%of total *** study suggests that TH_(2)0 can be applied in WWTP facilities for water purification and production of valuable biomass to mitigate CO_(2)and N_(2)O emissions。