A novel biological treatment of hydrothermal carbonization wastewater by using Thraustochytrium striatum. (January 2022)

• Record Type: Journal Article
• Authors: Zhang, Ke; Adams, Kameron J.; Kumar, Sandeep; Wang, Zhi-Wu; Zheng, Yi
• Is Part Of: Process biochemistry. Volume 112(2022)
• Page Start: 217
• Page End: 222
• Publication Date: 2022-01
• Subjects: Marine protist -- Hydrothermal carbonization -- Wastewater treatment -- Municipal solid waste -- Total organic carbon; Biochemical engineering -- Periodicals; Biotechnology -- Periodicals; Biochemistry -- periodicals; Biotechnology -- periodicals; Chemical Engineering -- periodicals; Génie biochimique -- Périodiques; Biotechnologie -- Périodiques; Biochemical engineering; Biotechnology; Periodicals; 660.63
• DOI: 10.1016/j.procbio.2021.12.005
• Languages: English
• ISSNs: 1359-5113

Abstract

Graphical abstract: Highlights: A novel marine protist-based biological treatment of HC-AP was studied. Dilution rate and nitrogen concentration had significant effects on TOC/TN/TP removal. Optimal conditions degraded 82 % TOC, 53 % TN, 94 % TP, and 89 % refractory compounds. Thraustochytrium striatum is a promising microorganism for biological treatment of HC-AP. Abstract: Hydrothermal conversion (HC) is a promising thermochemical technology to produce biofuels and bioproducts from biomass. However, the disposal of HC aqueous product (HC-AP) is one of the biggest challenges. This research investigated a new biological method using a marine protist, Thraustochytrium striatum to treat HC-AP from hydrothermal carbonization of municipal solid waste. A full factorial experiment was carried out to examine the effects of operation conditions on HC-AP treatment regarding cell growth, cellular lipid accumulation, and removals of total organic carbon (TOC)/total nitrogen (TN)/total phosphorus (TP)/recalcitrant compounds. Among four factors, only dilution rate and nitrogen concentration had significant effects on all responses, while salinity and pH were insignificant. Under the optimum conditions, T. striatum achieved 1.27 g/L dry cell mass and 14 % cellular lipid content while removing 82 % TOC, 53 % TN, 94 % TP, and ∼89 % refractory compounds. This research offers a new biological platform for HC-AP treatment and valorization.