Performance of cathodic nitrate reduction driven by electricity generated from ANAMMOX sludge in anode. (March 2020)

• Record Type: Journal Article
• Authors: Zhang, Hanmin; Ge, Chengcheng; Yu, Mingchuan; Zhang, Jingfang; Wang, Yuezhu; Cai, Lu; Yang, Fenglin
• Is Part Of: Process biochemistry. Volume 90(2020)
• Page Start: 148
• Page End: 155
• Publication Date: 2020-03
• Subjects: ANAMMOX -- Sludge -- Microbial fuel cell -- Nitrogen removal -- Electricity generation; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2019.11.013
• Languages: English
• ISSNs: 1359-5113

Abstract

Highlights: ANAMMOX sludge-MFC achieved high nitrogen removal of 1.69 Kg N/m 3 d and generated electricity. At NLR of 1.74 Kg·N/m 3 ·d exhibited the TN removal efficiency of 96.34%. The ratio of produced nitrate and consumed ammonium ratio was -0.27 to 0.02. Candidatus_Brocadia was more adaptive to anode surface than Candidatus_Kuenenia. Abstract: In this study, ANAMMOX sludge was used as anode microbial catalysts to drive electrocatalytic reduction of nitrate in the SnCu-Pd/CFC catalytic cathode with total nitrogen (TN) removal efficiency of ANAMMOX as well as generate electricity without additional carbon and energy source. The system operation with 1.74 Kg·N/m 3 ·d as nitrogen loading rate (NLR) exhibited a TN removal efficiency of 96.3% and obtained the highest nitrogen removal rate (NRR, 1.69 Kg·N/m 3 ·d), increased by 14.9% and 0.30 Kg·N/m 3 ·d compared with open circuit (control group), respectively. Maximum voltage (39.8 mV) and power density (21.20 ± 0.05 mW/m 3, standardized to anode surface area) were also observed. Additionally, microbial community analysis revealed community structure of S2anode had an obvious disparity compared with others as the predominant ANAMMOX bacteria (AnAOB) closed to anode surface was evolved from Candidatus_Kuenenia to Candidatus_Brocadia.