PDF(Pubmed)
Abstract：
Currently, there is a growing interest in transforming wastewater treatment plants (WWTPs) into resource recovery plants. Microorganisms in aerobic granular sludge produce extracellular polymeric substances (EPS), which are considered sustainable resources to be extracted and can be used in diverse applications. Exploring applications in other high-value materials, such as adhesives, will not only enhance the valorization potential of the EPS but also promote resource recovery. This study aimed to characterize a water-soluble fraction extracted from the EPS collected at the demonstration plant in the Netherlands based on its chemical composition (amino acids, sugar, and fatty acids) and propose a proof-of-concept for its use as an adhesive. This fraction comprises a mixture of biomolecules, such as proteins (26.6 ± 0.3%), sugars (21.8 ± 0.2%), and fatty acids (0.9%). The water-soluble fraction exhibited shear strength reaching 36-51 kPa across a pH range of 2-10 without additional chemical treatment, suggesting a potential application as an adhesive. The findings from this study provide insights into the concept of resource recovery and the valorization of excess sludge at WWTPs.
摘要：
目前,人们对将废水处理厂（WWTP）转变为资源回收厂越来越感兴趣。好氧颗粒污泥中的微生物产生胞外聚合物（EPS），这些资源被认为是可持续的资源，可以用于各种应用。探索在其他高价值材料中的应用，如粘合剂，不仅可以提高EPS的增值潜力，还可以促进资源回收。本研究旨在根据其化学成分（氨基酸，糖,和脂肪酸），并提出了将其用作粘合剂的概念证明。该部分包含生物分子的混合物，例如蛋白质（26.6±0.3％），糖（21.8±0.2%），和脂肪酸（0.9％）。在没有额外化学处理的情况下，水溶性部分在2-10的pH范围内表现出达到36-51kPa的剪切强度，建议作为粘合剂的潜在应用。这项研究的结果为资源回收的概念和污水处理厂剩余污泥的增值提供了见解。
