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Bioenergy production and treatment of aquaculture wastewater using saline anode microbial fuel cell under saline condition
Environmental Technology & Innovation ( IF 7.1 ) Pub Date : 2020-12-23 , DOI: 10.1016/j.eti.2020.101331
Arulazhagan Pugazhendi , Ghada Ghazi Alreeshi , Mamdoh T. Jamal , Tamilarasan Karuppiah , Rajesh Banu Jeyakumar

Saline anode microbial fuel cell (SA-MFC) equipped with carbon felt as anode and cathode, separated by nafion membrane was used to evaluate the aquaculture wastewater treatment efficiency and energy production under saline condition (4%). Operation of SA-MFC was executed at different organic load (OL) from 0.5 gCOD/L to 1.5 gCOD/L under saline condition. TCOD (Total Chemical Oxygen Demand) removal was 75 ± 1.4%, 81 ± 0.9% and 84 ± 1.1% at 0.5, 0.75 and 1 gCOD/L OL respectively. SCOD (Soluble Chemical Oxygen Demand) removal in SA-MFC was 68 ± 1.2%, 75 ± 0.8% and 81 ± 0.5% at 0.5, 0.75 and 1 g COD/L OL. Among the OL used 1.25 gCOD/L recorded high TCOD (92 ± 1.1%), SCOD (91 ± 0.5%) and TSS (Total Suspended Solids) removal (78 ± 0.7%) with a maximum power production (369 mW/m2). Increase in OL to 1.5 gCOD/L revealed decline in TCOD (79 ± 1.3%), SCOD (74 ± 0.8%), TSS (71 ± 1.5%) removal and power production (310 mW/m2). The predominant bacterial strains responsible for aquaculture wastewater treatment and energy production was identified as Ochrobactrum (53%), Marinobacter (22%) and Rhodococcus (15%). The other strains such as Bacillus, Stenotrophomonas, Xanthobacter, Sphingomonas, Pseudomonas and Sedimentibacter also present in the SA-MFC reactor operated under saline condition.



中文翻译:

盐水条件下使用盐水阳极微生物燃料电池生产水产养殖废水的生物能

以Nafion膜隔开的,以碳毡为阳极和阴极的盐阳极微生物燃料电池(SA-MFC),用于评估盐水条件下(4%)的水产养殖废水处理效率和能量产生。SA-MFC的操作是在盐水条件下,以0.5 gCOD / L至1.5 gCOD / L的不同有机负荷(OL)进行的。在0.5、0.75和1 gCOD / L OL下,TCOD(总化学需氧量)去除率分别为75±1.4%,81±0.9%和84±1.1%。在0.5、0.75和1 g COD / L OL下,SA-MFC中的SCOD(可溶化学需氧量)去除率为68±1.2%,75±0.8%和81±0.5%。在使用的1.25 gCOD / L的OL中,记录的高TCOD(92±1.1%),SCOD(91±0.5%)和TSS(总悬浮固体)去除率(78±0.7%)高,最大发电量(369 mW / m 2))。OL升高至1.5 gCOD / L,表明TCOD(79±1.3%),SCOD(74±0.8%),TSS(71±1.5%)去除和发电量(310 mW / m 2)下降。确定了负责水产养殖废水处理和能源生产的主要细菌菌株为O曲菌(53%),马氏杆菌(22%)和红球菌(15%)。其它菌株如芽孢杆菌嗜麦芽黄色杆菌鞘氨醇假单胞菌Sedimentibacter也存在于SA-MFC反应器盐水的条件下操作。

更新日期:2020-12-29
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