Hai The Pham Hien Thi Tran Linh Thuy Vu Hien The Dang Thuy Thu Thi Nguyen Thu Ha Thi Dang Mai Thanh Thi Nguyen Huy Quang Nguyen Byung Hong Kim 2024-01-19T19:33:44Z 2024-01-19T19:33:44Z 2022-01-25 2019-07 1017-7825 https://pubs.kist.re.kr/handle/201004/119801 In this study, we investigated the potential of using sediment bioelectrochemical systems (SBESs) for in situ treatment of the water and sediment in brackish aquaculture ponds polluted with uneaten feed. An SBES integrated into a laboratory-scale tank simulating a brackish aquaculture pond was established. This test tank and the control (not containing the SBES) were fed with shrimp feed in a scheme that mimics a situation where 50% of feed is uneaten. After the SBES was inoculated with microbial sources from actual shrimp pond sediments, electricity generation was well observed from the first experimental week, indicating successful enrichment of electrochemically active bacteria in the test tank sediment. The electricity generation became steady after 3 weeks of operation, with an average current density of 2.3 mA/m(2) anode surface and an average power density of 0.05 mW/m(2) anode surface. The SBES removed 20-30% more COD of the tank water, compared to the control. After 1 year, the SBES also reduced the amount of sediment in the tank by 40% and thus could remove approximately 40% more COD and approximately 52% more nitrogen from the sediment, compared to the control. Insignificant amounts of nitrite and nitrate were detected, suggesting complete removal of nitrogen by the system. PCR-DGGE-based analyses revealed the dominant presence of Methylophilus rhizosphaerae, Desulfatitalea tepidiphila and Thiothrix eikelboomii, which have not been found in bioelectrochemical systems before, in the bacterial community in the sediment of the SBES-containing tank. The results of this research demonstrate the potential application of SBESs in helping to reduce water pollution threats, fish and shrimp disease risks, and thus farmers' losses. English KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY A Laboratory-Scale Study of the Applicability of a Halophilic Sediment Bioelectrochemical System for in situ Reclamation of Water and Sediment in Brackish Aquaculture Ponds: Establishment, Bacterial Community and Performance Evaluation Article 10.4014/jmb.1905.05043 1 JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, v.29, no.7, pp.1104 - 1116 JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY 29 7 1104 1116 N scie scopus kci ART002489019 000477632900012 2-s2.0-85070787461 Biotechnology & Applied Microbiology Microbiology Biotechnology & Applied Microbiology Microbiology Article MICROBIAL FUEL-CELLS GRADIENT GEL-ELECTROPHORESIS SP NOV. PHYLOGENETIC-RELATIONSHIPS ELECTRICITY-GENERATION ACTIVATED-SLUDGE NITROGEN REMOVAL ENERGY DENITRIFICATION SALINITY Microbial fuel cell sediment bioelectrochemical systems brackish aquaculture in situ bioremediation