Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China.
Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China.
Bioresour Technol. 2019 Jan;272:105-113. doi: 10.1016/j.biortech.2018.10.012. Epub 2018 Oct 6.
Mustard tuber wastewater (MTWW) was used as both anolyte and catholyte in biocathode microbial fuel cell (BMFC). The results showed simultaneous nutrient and carbon removal and electricity generation were realized in BMFC. Excellent Chemical Oxygen Demand (COD) removal occurred in both anode (>90%) and cathode (>91%). Concerning nutrient removal, it was mainly removed in cathode. The maximum total phosphorus (TP) removal could reach 80.8 ± 1.0% by biological action. Simultaneous nitrification and denitrification (SND) was realized in cathode. The bacteria involved in nitrification were Nitrosomonas and SM1A02. Oceanimonas and Saprospiraceae_uncultured (anaerobic denitrifier), Thauera, Stenotrophomonas, Flavobacterium and Marinobacter (aerobic denitrifier), and Thioalkalispira (autotrophic denitrifier) were responsible for denitrification. Considering slight variation of anode and cathode pH, it could be concluded that MTWW was adequately self-buffered when used as electrolyte. Furthermore, electricity generation decreased with cathodic dissolved oxygen (DO) declining. These findings provide a novel method for MTWW resourceful treatment.
芥菜渣废水（MTWW）被用作生物阴极微生物燃料电池（BMFC）的阳极电解液和阴极电解液。结果表明，在 BMFC 中实现了同时去除营养物质和碳并发电。阳极（>90%）和阴极（>91%）中均实现了优异的化学需氧量（COD）去除。关于营养物质的去除，主要在阴极进行。通过生物作用，最大总磷（TP）去除率可达 80.8±1.0%。阴极中实现了同步硝化反硝化（SND）。参与硝化作用的细菌是亚硝化单胞菌和 SM1A02。Oceanimonas 和 Saprospiraceae_uncultured（厌氧反硝化菌）、Thauera、 Stenotrophomonas、Flavobacterium 和 Marinobacter（好氧反硝化菌）和 Thioalkalispira（自养反硝化菌）负责反硝化作用。考虑到阳极和阴极 pH 值的轻微变化，可以得出结论，当用作电解质时，MTWW 具有足够的自缓冲能力。此外，随着阴极溶解氧（DO）的降低，发电量也随之下降。这些发现为 MTWW 的资源化处理提供了一种新方法。
