A review of alginate-like extracellular polymers from excess sludge: Extraction, characterization, and potential application

文献类型： 外文期刊

第一作者： Zeng, Run-Gen

作者： Zeng, Run-Gen;Shi, Chen;Hao, Li-Ting;Huang, Ao;Zeng, Run-Gen;Yuan, Tian;Zhang, Nan

作者机构：

关键词： Conventional activated sludge; Aerobic granular sludge; Extracellular polymeric substances; Alginate-like extracellular polymers

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：7.0； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2023 年 56 卷

页码：

收录情况： SCI

摘要： Long-term operation of wastewater treatment plants results in the production of a large amount of sewage sludge whose disposal is a critical problem. The excess sludge from both conventional activated sludge and aerobic granular sludge contains a high concentration of extracellular polymeric substances, which contributes to the granular sludge formation and dehydration process. ALEs, characterized by their exceptional gel-forming attributes, are classified as a form of structural extracellular polymeric substances, and gained more attention, then the other extractions, such as sulfated polysaccharides, hyaluronic acid-like polymers, sulfated glycosaminoglycans-like polymers, and amyloid-like proteins. Furthermore, ALEs hold potential for recycling as versatile biomaterials, finding utility across various domains, including coating materials, adsorbents, flame retardants, slow-release materials, and seed coatings. This study discusses the extraction method, primary structure, and potential application scenarios of ALE that is a high value-added biomaterial in EPSs. Efficient extraction and application of ALEs are expected to lead to a marked change in wastewater treatment plants, thereby contributing to the development of a sustainable and circular economy.

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