To further enhance the bio-photoelectrochemical system (BPES) performance for nitrofurazone (NFZ) degradation and current output, the g-C3N4/CdS photocathode was optimized, and microbial community shift from inoculation to the BPES was analyzed. Results showed that photocathode with g-C3N4/CdS (mass ratio of 1:9) loading of 7.5 mg/cm2 exhibited the best performance, with NFZ removal of 83.14% (within 4 h) and current of ~9 mA in the BPES. Proteobacteria accounted for the largest proportion: 66.53% (inoculation), 71.89% (microbial electrolysis cell (MEC) anode), 74.67% (BPES anode) and 57.31% (BPES cathode), respectively. In addition, Geobacter was the most dominant genus in MEC and BPES anode and cathode, which occupied 31.64%, 67.73% and 41.34%, respectively. The microbial compositions of BPES anode and cathode were similar, but different from that of MEC anode. Notably, Rhodopseudomonas, a photosynthetic species, was detected in the BPES. Cognition of microbial community in the BPES is important for advancing its development.

中文翻译：

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在太阳能光生物光电化学系统中，呋喃唑酮降解的光阴极优化和微生物群落。

为了进一步增强生物降解物对呋喃西林（NFZ）降解和电流输出的生物光电化学系统（BPES）的性能，优化了g-C3N4 / CdS光电阴极，并分析了微生物群落从接种向BPES的转变。结果表明，g-C3N4 / CdS（质量比为1：9）负载为7.5 mg / cm2的光电阴极表现出最佳性能，在BPES中NFZ去除率为83.14％（在4 h内），电流约为9 mA。变形杆菌占最大比例：分别为66.53％（接种），71.89％（微生物电解池（MEC）阳极），74.67％（BPES阳极）和57.31％（BPES阴极）。此外，在MEC和BPES阳极和阴极中，Geobacter是最主要的属，分别占31.64％，67.73％和41.34％。BPES阳极和阴极的微生物组成相似，但与MEC阳极不同。值得注意的是，在BPES中检测到了光合物种红假单胞菌。BPES中对微生物群落的认识对于促进其发展至关重要。