碳化强度对污泥脱水及裂解液性质的影响——基于Ruyter模型分析

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Abstract The study used Ruyter model and proposes index of ‘carbonization intensity’. On the basis of the index, the coupling effects of both carbonization temperature and carbonization time on dewaterability of sludge and physicochemical characteristics of produced lysate were analyzed. Furthermore, the mechanism of dewatering performance improvement by hydrothermal carbonization was illustrated as well. Results show that in the lab condition, at the carbonization intensity of higher than 0.12, the water content of treated sludge reduced to 55% after suction filtration, which reached to the level of self-sustaining combustion. The reason for good dewatering performance was due to a series of reactions of macromolecular substances (eg. protein or polysaccharide) under a certain carbonization intensity, such as hydrolysis, polycondensation, decarboxylation. However, in an excessive high carbonization intensity condition (0.21), the degree of aromatization was deepened, which resulted in worse biodegradability of lysate.

Key words： Ruyter model hydrothermal carbonization sludge dewatering carbonization intensity lysate

Received: 13 April 2023

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X705

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	Articles by authors
	KONG Xin
	HOU Yun
	GUO Yan-feng
	LI Rui-yun
	BAI Heng
	YUAN Jin

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KONG Xin,HOU Yun,GUO Yan-feng等. Effects of carbonization intensity on dewatering performance of municipal sludge and characteristics of lysate——based on Ruyter model[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5892-5899.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5892

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