Anaerobic digestion of saline waste activated sludge and recovering raw sulfated polysaccharides. (September 2021)

• Record Type: Journal Article
• Authors: Liu, Jie; Zhang, Zi; Xue, Weiqi; Siriweera, Withanage B.; Chen, Guanghao; Wu, Di
• Is Part Of: Bioresource technology. Volume 335(2021)
• Publication Date: 2021-09
• Subjects: Resource recovery -- Sulfated polysaccharides -- Anaerobic digestion -- Waste activated sludge; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125255
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Examining the possibility of recovering sulfated polysaccharides (SPs). Over 50% of SPs could be recovered from anaerobic digested sludge. All extracted SPs samples were in high purity > 80% of the total mass. Total metal in SPs samples only accounted for < 2% of the total mass. All extracted SPs samples appeared certain bioactivities. Abstract: 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.