title: Inhibition and recovery of continuous electric field application on the activity of anammox biomass.
abstract: In this study, the effects of electric field on the activity of anammox biomass were investigated. In batch mode, experimental results demonstrated that the nitrogen removal rate enhanced by 25.6 % compared with the control experiment at the electric field of 2 V/cm with application time of 20 min. However, continuous application (24 h) of electric field impacted a mal-effect on anammox biomass during the intensity between 1 and 4 V/cm. After the electric field was removed, the activity of anammox biomass could recover within 2 weeks. This implied that the mal-effect of electric field on anammox biomass was reversible. The decrease of heme c contents and crude enzyme activity demonstrated to be the main reason for the depress of the anammox biomass activity. Transmission electron microscope observation also proved the morphological change of anammox biomass under electric field.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, People's Republic of China, qscyj@mail.dlut.edu.cn.
authors.forename: Sen
authors.initials: S
authors.lastname: Qiao
authors.forename: Xin
authors.initials: X
authors.lastname: Yin
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
authors.forename: Kenji
authors.initials: K
authors.lastname: Furukawa
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism*; D000693:Anaerobiosis; D001419:Bacteria / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D004560:Electricity; D018628:Gene Dosage; D006418:Heme / Q000031:analogs & derivatives / Q000378:metabolism; D009584:Nitrogen / Q000302:isolation & purification; D010084:Oxidation-Reduction; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013997:Time Factors
chemical_list: D064751:Ammonium Compounds; D012336:RNA, Ribosomal, 16S; C031690:heme C; D006418:Heme; D009584:Nitrogen