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The properties and combustion behaviors of hydrochars derived from co-hydrothermal carbonization of sewage sludge and food waste

Author:
Zheng, Chupeng, Ma, Xiaoqian, Yao, Zhongliang, Chen, Xinfei
Source:
Bioresource technology 2019 v.285 pp. 121347
ISSN:
0960-8524
Subject:
carbonization, combustion, decarboxylation, energy, food waste, fuels, hydrochars, mixing ratio, proximate composition, sewage sludge, temperature, thermal properties
Abstract:
The experiments of co-hydrothermal carbonization (co-HTC) of sewage sludge and food waste in different mixing ratio (30%, 50% and 70%) and process temperature (180 °C, 230 °C and 280 °C) were conducted in this paper. And the hydrochars properties and thermal behaviors were investigated to determine the effects of the conditions. The results showed that the hydrochars derived from co-HTC possessed higher C content, higher HHV compared with the hydrochar of sewage sludge. Meanwhile, it maintained low N, S and O content relatively. It ascribed to the carbonization, dehydration and decarboxylation reactions according to the ultimate analysis and proximate analysis. And the TGA indicated that the combustion behaviors got better compared with the hydrochar of sewage sludge. Therefore, the co-HTC with food waste is an effective way to transform sewage sludge into clean solid fuel in the field of energy utilization.
Agid:
6374723