Assessing the Effect of Anionic Surfactants on the Performance of Enhanced In-sewer Purification with Porous Media

Q3 Environmental Science

Journal of Water and Environment Technology Pub Date : 2022-01-01 DOI:10.2965/jwet.22-083

Regina Mardatillah, Tiffany Joan Sotelo, Yuta Shinfuku, F. Kurisu, H. Satoh

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Abstract

The effect of anionic surfactants on organic matter degradation during enhanced in-sewer purification by porous media was evaluated in this study. Surfactants, wherein the anionic subgroup comprises a significant portion of surfactant load in domestic wastewater, are anticipated to affect biofilm activity during enhanced in-sewer purification negatively. To evaluate this, synthetic feed containing a fixed concentration of readily biodegradable organic matter and different anionic surfactant concentrations was supplied intermittently to an airtight channel intended for enhanced in-sewer purification for 32 days. Dodecylbenzene sulfonate, as sodium dodecylbenzene sulfonate, was used as a model anionic surfactant. Results showed that increased anionic surfactant concentration up to 160 mg L −1 decreased aerobic organic matter degradation rate by up to 36% of the initial rate. It was inferred from the com-positional analysis of effluent surfactants by liquid chromatography tandem mass spectrometry that the accumulation of possible inhibitory intermediate products may have caused decline in rates over time. Recovery of aerobic activity related to organic matter degradation was observed with continued operation under decreasing influent anionic surfactant concentration. Findings highlight that although increased surfactants concentrations negatively affected aerobic activity, aerobic organic matter was still continuously degraded aerobically.

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阴离子表面活性剂对多孔介质强化下水道净化性能的影响

研究了阴离子表面活性剂对多孔介质强化污水净化过程中有机物降解的影响。表面活性剂，其中阴离子亚群包括生活废水中表面活性剂负荷的很大一部分，预计会在污水净化过程中对生物膜活性产生负面影响。为了评估这一点，将含有固定浓度的易于生物降解的有机物质和不同浓度的阴离子表面活性剂的合成饲料间歇性地供应给一个密封通道，用于加强下水道净化，持续32天。以十二烷基苯磺酸钠为模型阴离子表面活性剂。结果表明，当阴离子表面活性剂浓度增加到160 mg L−1时，好氧有机物的降解率降低了36%。通过液相色谱串联质谱法对出水表面活性剂的成分分析推断，随着时间的推移，可能的抑制中间产物的积累可能导致速率下降。在降低阴离子表面活性剂浓度的情况下，继续操作，观察到与有机物降解有关的好氧活性的恢复。研究结果强调，尽管表面活性剂浓度的增加对好氧活性有负面影响，但好氧有机物仍在持续进行好氧降解。

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来源期刊

Journal of Water and Environment Technology Environmental Science-Water Science and Technology

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

43 weeks

期刊介绍： The Journal of Water and Environment Technology is an Open Access, fully peer-reviewed international journal for all aspects of the science, technology and management of water and the environment. The journal’s articles are clearly placed in a broader context to be relevant and interesting to our global audience of researchers, engineers, water technologists, and policy makers. JWET is the official journal of the Japan Society on Water Environment (JSWE) published in English, and welcomes submissions that take basic, applied or modeling approaches to the interesting issues facing the field. Topics can include, but are not limited to: water environment, soil and groundwater, drinking water, biological treatment, physicochemical treatment, sludge and solid waste, toxicity, public health and risk assessment, test and analytical methods, environmental education and other issues. JWET also welcomes seminal studies that help lay the foundations for future research in the field. JWET is committed to an ethical, fair and rapid peer-review process. It is published six times per year. It has two article types: Original Articles and Review Articles.