由于使用的处理方法不足,由印染废水(TDW)加剧的全球水污染加剧了重大的环境和健康问题。因此,必须实施更有效的治疗方案来解决这些问题。在这项研究中,引入了涉及废水再循环(ER)和Rubiacordifolia植物来源的紫癜电子介体(EM)的不同环保策略,以增强反重力流微生物燃料电池(AGF-MFC)的实际TDW和生物发电性能的处理。结果表明,水力停留时间(HRT)为48小时,再循环比为1,其中生化需氧量(BOD5)的降低效率的组合达到了最佳性能,化学需氧量(COD),铵(NH4+),硝酸盐(NO3-),硫酸盐(SO42-),氨氮(NH3-N),颜色和浊度为82.17%,82.15%,85.10%,80.52%,75.91%,59.52%,71.02%和93.10%,分别。在生物发电性能方面,AGF-MFC的最大输出电压和功率密度分别为404.72mV和65.16mW/m2。此外,结果还表明,与合成紫癜作为EM相比,天然紫癜对TDW的处理性能更高。高度稳定的合成紫癜EM介导电子转移的反应性降低是导致植物来源紫癜表现优异的一个因素。此外,提出了紫癜的详细电子介导机制,以阐明AGF-MFC中涉及的潜在电子转移途径。这项研究提供了对开发更可持续的解决方案来管理TDW的见解,从而减少环境污染。
Escalating global water pollution exacerbated by textile-dyeing wastewater (TDW) poses significant environmental and health concerns due to the insufficient treatment methods being utilized. Thus, it is imperative to implement more effective treatment solutions to address such issues. In this research, different environmentally-friendly strategies involving effluent recirculation (ER) and Rubia cordifolia plant-derived purpurin electron mediator (EM) were introduced to enhance the treatment of real TDW and bioelectricity generation performance of an anti-gravity flow microbial fuel cell (AGF-MFC). The results revealed that optimum performance was achieved with a combination of hydraulic retention time (HRT) of 48 h with a recirculation ratio of 1, where the reduction efficiency of biochemical oxygen demand (BOD5), chemical oxygen demand (COD), ammonium (NH4+), nitrate (NO3-), sulphate (SO42-), ammonia nitrogen (NH3-N), colour and turbidity were 82.17 %, 82.15 %, 85.10 %, 80.52 %, 75.91 %, 59.52 %, 71.02 % and 93.10 %, respectively. In terms of bioelectricity generation performance, AGF-MFC showed a maximum output voltage and power density of 404.72 mV and 65.16 mW/m2, respectively. Moreover, the results also signified that higher treatment performance of TDW was obtained with natural purpurin from Rubia cordifolia plant than synthetic purpurin as EM. The reduced reactivity of highly stable synthetic purpurin EM for mediating the electron transfer was a contributing factor to the outperformance of plant-derived purpurin. Additionally, detailed electron-mediating mechanisms of purpurin were proposed to unravel the underlying electron transfer pathway involved in AGF-MFC. This research offers insight into the development of more sustainable solutions for managing TDW, and consequently reducing environmental pollution.