Energy yield optimization of co-hydrothermal carbonization of sewage sludge and pinewood sawdust coupled with anaerobic digestion of the wastewater byproduct

Wang, Ruikun; Lin, Kai; Peng, Pingbo; Lin, Zhaohua; Zhao, Zhenghui; Yin, Qianqian; Ge, Lichao

doi:10.1016/j.fuel.2022.125025

Cited by 20 publications

(1 citation statement)

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“…Sewage sludge is a byproduct generated in the process of sewage treatment, which contains many organic pollutants, heavy metals, parasites, pathogens, and other substances harmful to the environment and human health. − Due to rapid economic and social developments globally, the quantity of sludge produced has dramatically increased. Many countries have developed relevant policies regarding sludge treatment and disposal to encourage a reduction in its yield in a controllable way and render it harmless, with an eye toward transformation to useful products.…”

Section: Introductionmentioning

confidence: 99%

Co-Gasification Synergistic Characteristics of Sewage Sludge and High-Sodium Coal

Zhang

Liu

et al. 2023

ACS Omega

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A comprehensive study was conducted to assess the co-gasification characteristics of sewage sludge and high-sodium coal. As the gasification temperature increased, the CO2 concentration was decreased, and the concentrations of CO and H2 were increased, while the change of CH4 concentration was not obvious. As the coal blending ratio increased, the H2 and CO concentrations initially increased and then decreased, while the CO2 concentration initially decreased and then increased. The mixture of sewage sludge and high-sodium coal shows the synergistic effect of co-gasification, and the synergistic effect was to promote the gasification reaction positively. The average activation energies of co-gasification reactions were calculated by the OFW method, and the average activation energy initially decreases and then increases as the coal blending ratio increases. Both fluidized-bed gasification and thermogravimetric analyzer gasification show that the optimum coal blending ratio is 0.6. Overall, these results provide a theoretical basis for the industrial application of sewage sludge and high-sodium coal co-gasification.

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