TZW:DVGW Technologiezentrum Wasser, Department Water Microbiology, Karlsruher Straße 84, 76139, Karlsruhe, Germany.
Environ Sci Pollut Res Int. 2023 Oct;30(49):107673-107680. doi: 10.1007/s11356-023-29839-1. Epub 2023 Sep 22.
Chloroethenes are globally prevalent groundwater contaminants. Since 2014, TCE has been shown to be degradable in an aerobic metabolic process where it is used as sole energy source and growth substrate by a mixed bacteria culture (SF culture). In 2019, the SF culture was shown to be successfully used in bioaugmentation approaches under field-relevant conditions. In this study, a combined bio-/electro-approach to stimulate the TCE degradation by the SF culture was investigated in laboratory experiments. Column experiments were set up to compare a bioaugmentation approach with an electrochemical biostimulated bioaugmentation approach. Low strength direct current increased the amount of degraded TCE to about 150 % of the control. Through lowering the inflow concentration of oxygen, the effect of the electro-biostimulation in a low oxygen setting confirmed the potential of the bio-electro process for treatment of oxygen-deprived, TCE-contaminated sites.
氯乙烯是全球普遍存在的地下水污染物。自 2014 年以来，已经证明三氯乙烯可在有氧代谢过程中降解，在该过程中，它被一种混合细菌培养物（SF 培养物）用作唯一的能量来源和生长基质。2019 年，SF 培养物已被证明可在现场相关条件下成功用于生物增强方法。在这项研究中，在实验室实验中研究了一种组合的生物-/电化学方法来刺激 SF 培养物降解三氯乙烯。设置了柱实验来比较生物增强方法和电化学生物刺激生物增强方法。低强度直流电将降解的三氯乙烯的量增加到对照的约 150%。通过降低氧气的流入浓度，在低氧环境下电生物刺激的效果证实了生物电化学过程在处理缺氧、三氯乙烯污染场地方面的潜力。
