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在基于氧和乙的膜生物膜反应器中,化乙烯的共同代谢生物降解

Zifang Chi¹, Xinyang Liu¹, Huai Li²

¹Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, PR China.

The Science of the total environment

|September 24, 2023

概括

在膜生物膜反应器中使用乙和氧气进行有氧生物修复,有效地去除了DCE,TCE和PCE等化乙烯. 这种方法在处理地下水污染方面表现有前途.

科学领域:

环境科学环境科学
微生物学微生物学
化学工程是化学工程的重要组成部分.

背景情况:

地下水被化乙烯污染,是全球环境的挑战.
使用乙 (C2H6) 作为主要基质的有氧共同代谢提供了一个潜在的生物修复策略.

研究的目的:

评估膜生物膜反应器 (MBfR) 的长期疗效,用于使用乙和氧气持续生物降解化乙烯.
研究微生物群落和代谢途径,参与共同代谢过程.

主要方法:

一个膜生物膜反应器 (MBfR) 连续运行了133天,通过气体传递膜提供乙 (C2H6) 和氧 (O2).
对二乙烯 (DCE),三乙烯 (TCE) 和四乙烯 (PCE) 的生物降解效率进行了监测.
在现场进行了批量测试,以确定共同代谢动力学.
微生物社区分析的重点是C2H6氧化细菌,如Comonadaceae和Methylococcaceae.

主要成果:

对DCE,TCE和PCE实现了高的去除效率,高达94%,废水度低于5μM.
发现,具有较高化度的化合物的共同代谢动力学更快.
氧化乙的细菌,包括康马诺百科和甲基可可百科,利用单氧化反应.
一氧化酶被确定为一个关键的酶,负责乙代谢和化乙的共同代谢.

结论:

乙+氧MBfR系统是用于化乙烯的现场生物修复的可行平台.
单氧基酶的广泛作用表明,它可能适用于修复其他化有机污染物.

关键词:

化乙烯的使用方法同代谢是同代谢的过程.乙乙是一种天然气.地下水污染污染地下水污染膜生物膜反应器的反应器

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