Anaerobic digestion of saline waste activated sludge and recovering raw sulfated polysaccharides.

This study investigated a new bioresource technology of recovering raw chemicals of sulfated polysaccharides (SPs) from the digested saline waste activated sludge (WASsaline) that naturally contained 3-30% (w/w) of SPs. Two bench-scale anaerobic digestion (AD) experiments were conducted under mesophilic and thermophilic conditions; the effectiveness of extracting SPs from digested WASsaline and the biochemical characteristics of SPs were examined. After 20-days of digestion, the results showed that approximately 54 - 58% of initial total SPs in WASsaline were recoverable, in which 38 - 48% in solid digestate and 10-15% in liquid supernatant). The extracted raw chemicals of SPs were proven to be of high purity (>80%) and demonstrating significant properties such as anti-inflammation, anti-oxidation, and anti-coagulation for potential pharmaceutical-like application. Copyright © 2021 Elsevier Ltd. All rights reserved.

Citation

Jie Liu, Zi Zhang, Weiqi Xue, Withanage B Siriweera, Guanghao Chen, Di Wu. Anaerobic digestion of saline waste activated sludge and recovering raw sulfated polysaccharides. Bioresource technology. 2021 Sep;335:125255

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PMID: 33991881

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