Chen Xingyu, Lee Yu-Jen, Yuan Tian, Lei Zhongfang, Adachi Yasuhisa, Zhang Zhenya, Lin Yuemei, van Loosdrecht Mark C M
Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Bioresour Technol. 2022 Nov;363:127854. doi: 10.1016/j.biortech.2022.127854. Epub 2022 Sep 5.
A reasonable recovery of excess sludge may shift the waste into wealth. Recently an increasing attention has been paid to the recycling of extracellular biopolymers from conventional and advanced biological wastewater treatment systems such as flocculent activated sludge (AS), bacterial aerobic granular sludge (AGS), and algal-bacterial AGS processes. This review provides the first overview of current research developments and future directions in the recovery and utilization of high value-added biopolymers from the three types of sludge. It details the discussion on the recent evolvement of cognition or updated knowledge on functional extracellular biopolymers, as well as a comprehensive summary of the operating conditions and wastewater parameters influencing the yield, quality, and functionality of alginate-like exopolymer (ALE). In addition, recent attempts for potential practical applications of extracellular biopolymers are discussed, suggesting research priorities for overcoming identification challenges and future prospects.
合理回收剩余污泥可实现变废为宝。近年来，人们越来越关注从传统和先进的生物废水处理系统中回收细胞外生物聚合物，如絮凝活性污泥（AS）、细菌好氧颗粒污泥（AGS）和藻菌AGS工艺。本文综述首次概述了从这三种污泥中回收和利用高附加值生物聚合物的当前研究进展和未来方向。详细讨论了对功能性细胞外生物聚合物认识的最新演变或更新知识，以及对影响藻酸盐样胞外聚合物（ALE）产量、质量和功能的操作条件和废水参数的全面总结。此外，还讨论了细胞外生物聚合物潜在实际应用的近期尝试，提出了克服鉴定挑战的研究重点和未来前景。
