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在基于膜通风的生物电化学系统中,在碳有限条件下的染料脱色性能和机制的分子洞察力
Tianyi Wang1, Jiao Yin1, Jiaxuan Yang1
1National Engineering Research Center for Safe Disposal and Resources Recovery of Sludge, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China.
Water research
|February 22, 2025
概括
一种新型的电膜生物反应器 (E-MABR) 增强了废水中的染料脱色和矿化. 电刺激促进微生物活动和基因表达,在碳有限条件下提高污染物去除效率.
科学领域:
- 环境科学 环境科学
- 环境生物技术 环境生物技术
- 水处理 处理水的方法
背景情况:
- 生物电化学系统 (BES) 对染料脱色有希望,但需要随后的有氧矿化.
- 碳有限的废水对高效的色剂处理提出了挑战.
- 现有的方法通常需要额外的步骤来完全降解污染物.
研究的目的:
- 设计和评估一个电膜生物反应器 (E-MABR),用于在缺电子废水中同时去色,矿化和去化阿利沙林黄R (AYR).
- 研究电刺激对微生物群落,基因表达和生物膜内的细胞外聚合物质 (EPS) 的影响.
- 阐明在电场应力下增强AYR降解的分子机制.
主要方法:
- 一个反扩散生物膜支持的BES (E-MABR) 被建造并运行在碳有限的废水中使用阿里扎林黄R (AYR).
- 进行了微生物群体分析,基因表达概况 (向阿佐R) 和蛋白质结构分析 (β-sheet比例).
- 用分子动力学模拟来评估azoR酶和AYR之间的结合能量.
主要成果:
- E-MABR显著增加了阴极生物膜中的细胞外聚合物 (EPS),特别是蛋白质.
- 电刺激丰富了电活性细菌 (例如,Geobacter) 和AYR降解微生物 (例如,Thauera,Dechloromonas),上调了阿佐R基因表达.
- 与MABR相比,在电场应力下增强的蛋白质结构和分子相互作用使AYR降解效率提高了32.4%,矿化率提高了29.4%,总去除率提高了18.4%.
结论:
- 开发的E-MABR在具有挑战性的废水条件下有效地实现了AYR的同时脱色,矿化和脱.
- 电刺激在增强微生物活动,酶功能和整体治疗性能方面发挥着至关重要的作用.
- 这项研究展示了一种有前途的生物电化学方法,用于先进的废水处理,提高效率和去除污染物.
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