Siddharth T, Sridhar P, Vinila V, Tyagi R D
Water and Environment Division, Department of Civil Engineering National Institute of Technology - Warangal, Telangana, India.
Water and Environment Division, Department of Civil Engineering National Institute of Technology - Warangal, Telangana, India.
J Environ Manage. 2021 Jun 1;287:112307. doi: 10.1016/j.jenvman.2021.112307. Epub 2021 Mar 30.
During the last decade, water demand and wastewater generation has increased due to urbanization around the globe which had led to an increase in the utilization of chemicals/synthetic polymers for treating the wastewaters. These synthetic polymers used during the coagulation/flocculation process are non-renewable, non-biodegradable, and have a potential neurotoxic and carcinogenic effect. From the literature it is clear that extracellular polymer substance (EPS) is a potential bioflocculant, moreover it is renewable, biodegradable, eco-friendly, non-toxic as well as economically valued product. The various identification techniques and extraction methods of EPS are elaborated. Further application of EPS as absorbent in removing the dye from the industrial effluent is presented. Moreover EPS as a potential adsorbent for heavy metal removal from the various effluent is discussed. In addition, EPS is also utilized for soil remediation and soil erosion control. Mainly, EPS as bioflocculant in treating raw water, wastewater treatment, leachate and sludge management are summarized in this review.
在过去十年中，由于全球城市化进程，水需求和废水产生量有所增加，这导致用于处理废水的化学品/合成聚合物的使用量增加。这些在混凝/絮凝过程中使用的合成聚合物不可再生、不可生物降解，并且具有潜在的神经毒性和致癌作用。从文献中可以清楚地看出，胞外聚合物物质（EPS）是一种潜在的生物絮凝剂，此外它还是可再生、可生物降解、环保、无毒且具有经济价值的产品。阐述了EPS的各种鉴定技术和提取方法。介绍了EPS作为吸附剂在去除工业废水中染料方面的进一步应用。此外，还讨论了EPS作为从各种废水中去除重金属的潜在吸附剂。此外，EPS还用于土壤修复和土壤侵蚀控制。本综述主要总结了EPS作为生物絮凝剂在原水处理、废水处理、渗滤液和污泥管理中的应用。
