Conversion of sewage sludge from industrial wastewater treatment to solid fuel through hydrothermal carbonization process. (2023)

• Record Type: Journal Article
• Authors: Paiboonudomkarn, Siridet; Wantala, Kitirote; Lubphoo, Yingyote; Khunphonoi, Rattabal
• Is Part Of: Materials today. Volume 75(2023)Supplement
• Page Start: 85
• Page End: 90
• Publication Date: 2023
• Subjects: Sludge -- Hydrothermal carbonization -- Hydrochar -- Acetic acid -- Solid fuel; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.11.107
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Sludge is the unwanted solid waste produced during the treatment of industrial wastewater. The hydrothermal carbonization process (HTC) can be used to convert sewage sludge into a coal-like solid fuel. The effects of solid-to-liquid ratio and feed water pH on the physicochemical properties of hydrochars were investigated. According to the results, hydrothermal treatment enhanced the fuel characteristics of hydrochar with a high HHV and fixed carbon. Adding 0.8 M acetic acid resulted in the highest rate of energy recovery at 96.98 %. The observed H/C and O/C atomic ratios of HTC-0.4AA have been lowered to levels comparable to lignite coal. ICP-OES confirmed the presence of the metal in the hydrochar product. Examining the thermogravity analysis of raw materials and hydrochars with a TGA analyzer was then used to determine the combustion kinetics. In addition, combustion characteristics indicate that HTC improves the S combustibility index.