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Indexed by:Journal Papers

Date of Publication:2015-11-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、EI、PubMed、Scopus

Volume:196

Page Number:376-382

ISSN No.:0960-8524

Key Words:Anammox; Three-bio-electrode reactor; Electric potential; Extracellular polymeric substances; Key enzymes activities

Abstract:This research was designed to investigate the effects of different electric potentials (EPs) on the anammox biomass activity in a three-electrode reactor. Electric potential difference (EPD) of 0.08 V between the working and reference electrodes showed the best nitrogen removal performance. Under the optimal EPD of 0.08 V, the nitrogen removal rate of reactor 2 (R2, EP applied) reached 911 g-N/m3/d on day 188, which was 25.3% higher than that of reactor 1 (R1, the control). Moreover, the scanning electron microscope observation and extracellular polymeric substance analysis proved that EP application was conducive to the anammox cells growing onto the surface of electrode. Additionally, it was demonstrated that long-term EP application increased the crude enzymes activities and the cell quantities of the bio-electrode anammox reactor. Besides, transmission electron microscope observation proved the morphological variation of anammox biomass with continuous EP application. (C) 2015 Elsevier Ltd. All rights reserved.