微生物电解细胞同时增强甲化和减少废水污泥无氧消化中硫化的生产
Xiangyu Chen1, Benyi Xiao1, Xinyi Tang1
1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Science, Beijing, 100049, China.
Chemosphere
|July 9, 2023
概括
微生物电解细胞 (MEC) 显著提高了甲的产生和有机物质的去除,同时大大减少了污水污泥无氧消化 (AD) 中的硫化 (H2S). 应用的1.3V和1.6V电压优化了这些同时增强.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 污水污泥的无氧消化 (AD) 对于废物管理和能源回收至关重要.
- 在AD期间生产硫化 (H2S) 带来了运营挑战和环境问题.
- 微生物电解细胞 (MEC) 提供了一种有前途的方法来增强AD过程.
研究的目的:
- 为了研究MEC应用电压对污水污泥AD期间同时增强甲化和减少H2S的影响.
- 为了阐明微生物社区的转变和由AD中MECs影响的氧化还原条件.
主要方法:
- 污水污泥的无氧消化与微生物电解细胞 (MEC) 在0.8,1.3和1.6V的应用电压下相结合.
- 监测甲产量,有机物去除和H2S度.
- 氧化降解潜力 (ORP) 和微生物群落结构 (硫氧化和降解细菌,甲细菌) 的分析.
主要成果:
- 1.3V和1.6V的MEC显著增强了甲生产 (57.02%和12.70%) 和有机物去除 (38.77%和11.13%).
- 在1.3V和1.6V时,H2S产量大幅减少了94.8%和98.2%,分别为1.3V和1.6V.
- MECs创造了微空气条件,有利于氧化硫的细菌而不是减少硫的细菌,并增加了甲细菌的丰富性,改变了甲生成途径.
结论:
- MECs在同时增强甲化和减少污水泥AD中的H2S方面是有效的.
- 应用电压是优化AD系统中MEC性能的一个关键参数.
- 由MECs引起的微生物社区转移和氧化还原潜力变化是过程改进的关键机制.
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