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芳香碳化合物混合物的微空气生物降解:有效酸盐和氧气剂量的策略

Dilan Camille Aydin¹, Andrea Aldas-Vargas², Tim Grotenhuis²

¹Department of Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA, Wageningen, The Netherlands. dilanc.aydin@gmail.com.

Applied microbiology and biotechnology

|January 17, 2025

概括

微空气条件在地下环境中有效降解混合碳化合物. 交替的酸盐降解和微空气处理优化了氧气的使用,以有效地对污染物进行生物修复.

科学领域:

环境科学环境科学
微生物学微生物学
地质化学地质化学

背景情况:

芳香化合物的地下生物降解受到低溶解氧的限制.
在现场生物修复中补充氧气是昂贵的,技术上具有挑战性.
需要替代策略,以有效地去除无氧环境中的污染物.

研究的目的:

在交替的酸盐降解和微空气条件下,研究BTEX,印丁,印丁和甲混合物的生物降解.
与完全有氧和无氧条件相比,评估微有氧条件在增强污染物去除方面的效率.
优化氧气和酸盐剂量,用于碳化合物混合物的现场生物修复.

主要方法:

使用受污染的地下水和无氧含水层的沉积物进行批量实验.
在交替的微空气 (<0.5毫克 O2 L-1) 和酸盐降低条件下化样品98天.
在完全有氧和完全无氧 (减少酸盐) 条件下的比较研究.

主要成果:

在微空气条件下,所有测试化合物 (BTEX,印丁,印丁,纳丁) 的完整降解得到了实现.
微空气降解效率与完全有氧条件相当.
用酸盐降解条件进行预处理,然后进行微空气条件,提高了碳化合物生物降解的氧气利用率.

结论:

交替减少酸盐和微空气条件为复杂的碳化合物混合物的现场生物修复提供了有效的策略.
地表微生物可以在降低酸盐和微空气氧化氧化还原条件之间快速适应.
这种方法最大限度地减少了外部电子接受器的使用,同时最大限度地提高了污染物降解效率.

关键词:

在 BTEX 中使用 BTEX.生物修复是一种生物修复.微空气条件微空气条件降低酸盐的条件减少酸盐的条件补充氧气补充剂的使用氧化还原转换的转换过程

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