Yangin-Gomec Cigdem, Engiz Gizem
Istanbul Technical University, Department of Environmental Eng., Maslak, 34469 Istanbul, Turkey.
Heliyon. 2021 Feb 16;7(2):e06296. doi: 10.1016/j.heliyon.2021.e06296. eCollection 2021 Feb.
An up-flow anaerobic sludge bed (UASB) reactor was operated for five months to treat domestic wastewater contaminated by propylene glycol -main component of Type 2 aircraft deicing fluid (ADF)- at threshold ratio based on optimization study with batch reactors [i.e., operated at externally included ADF = 0.83-4.20%]. Biogas yields up to ~0.4 m/kg COD was achieved, however drastically reduced along with total chemical oxygen demand (tCOD) removal at ADF>1.20% and indicated strong inhibition. Hence, the UASB reactor was fed at ADF = 1.05% [tCOD = 8930 ± 2100 mg/L] and yielded >80% tCOD removal on average. Next generation sequencing (NGS) findings also revealed that and had the highest ratios of relative abundances in biomass sample taken at the last operating day; hence co-existence of these phyla played significant role in glycol removal with and bacteria whereas and archaea increased remarkably.
基于间歇式反应器的优化研究[即，在外部添加的飞机除冰液（ADF）=0.83-4.20%的条件下运行]，运行上流式厌氧污泥床（UASB）反应器五个月，以处理受丙二醇（2型飞机除冰液的主要成分）污染的生活污水。实现了高达约0.4 m³/kg COD的沼气产量，然而，当ADF>1.20%时，随着总化学需氧量（tCOD）的去除，沼气产量急剧下降，表明有强烈的抑制作用。因此，UASB反应器以ADF = 1.05%[tCOD = 8930±2100 mg/L]进料，平均tCOD去除率>80%。下一代测序（NGS）结果还显示，在最后一个运行日采集的生物质样品中，[具体微生物名称缺失]和[具体微生物名称缺失]的相对丰度比例最高；因此，这些门的共存对[具体微生物名称缺失]和[具体微生物名称缺失]细菌去除乙二醇起到了重要作用，而[具体微生物名称缺失]和[具体微生物名称缺失]古菌显著增加。
