Molecular Insights into Extracellular Polymeric Substances in Activated Sludge.,Environmental Science & Technology

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Molecular Insights into Extracellular Polymeric Substances in Activated Sludge.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-06-01 , DOI: 10.1021/acs.est.0c00850
Han-Qing Yu ₁

Affiliation

Extracellular polymeric substances (EPS) are known to crucially affect the properties and performance of activated sludge, but the detailed influential mechanisms and the pertinence to specific compositional, structural properties of EPS are still elusive. Such knowledge gaps have severely limited our ability in optimizing biological wastewater treatment processes, for which long-term robust and efficient sludge performance remains one of the main bottlenecks. Here, we overview the new knowledge on the molecular structure of sludge EPS gained over the past few years and discuss the future challenges and opportunities for further advancing EPS study and engineering. The structural and functional features of several macromolecules in sludge EPS and their important structural roles in granular sludge are analyzed in detail. The EPS–pollutant interactions and environment-dependent regulation machinery on EPS production are deciphered. Lastly, the remaining knowledge gaps are identified, and the future research needs that may lead to molecular-level understanding and precise engineering of sludge EPS are highlighted.

中文翻译：

对活性污泥中细胞外聚合物的分子洞察。

众所周知，细胞外聚合物 (EPS) 对活性污泥的性质和性能具有至关重要的影响，但详细的影响机制以及与 EPS 的特定组成、结构性质的相关性仍然难以捉摸。这种知识差距严重限制了我们优化生物废水处理工艺的能力，长期稳健和高效的污泥性能仍然是主要瓶颈之一。在这里，我们概述了过去几年获得的关于污泥 EPS 分子结构的新知识，并讨论了进一步推进 EPS 研究和工程的未来挑战和机遇。详细分析了污泥EPS中几种大分子的结构和功能特征及其在颗粒污泥中的重要结构作用。破译了 EPS 与污染物的相互作用和对 EPS 生产的环境依赖性调节机制。最后，确定了剩余的知识差距，并强调了可能导致污泥 EPS 的分子水平理解和精确工程的未来研究需求。

更新日期：2020-07-07

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