水热炭特性及强化厌氧发酵潜力研究进展

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Abstract Anaerobic digestion (AD) offers an attractive method to reduce the negative impact of organic waste existing in the environment such as stalk, animal manure and municipal sludge. The biogas, digestate and slurry generated have great application value in energy, agriculture, environmental protection and other fields. However, AD has some problems such as the lag phase, the inhibition effect caused by ammonia nitrogen, VFA and so on, and low methane content in biogas. Hydrochar is the solid product of hydrothermal carbonization of biomass which is converted to porous multi-functional carbon-based material with the presence of subcritical water in the sealed equipment under the effect of heat and pressure. The potential benefits and applications of hydrochar have received significant attention with complex pore structures and high density of oxygen-containing functional groups. There is a comprehensive strengthening effect on AD including shortening the lag phase, alleviating the inhibition, favoring electron transfer between microbes, and enhancing the CH₄ production with the addition of hydrochar. Specifically, it was brought together recent advances made in the area through a systematic and critical review of the characteristics, modification, and strengthening effect on AD of hydrochar. The potential and limitations involved in the hydrochar application on AD were pointed out with suggestions for further research to exploit the great potential of AD on treating agricultural wastes.

Key words： agricultural wastes biomass anaerobic digestion hydrochar methanogenesis

Received: 23 February 2023

PACS:	X705
	S216.4
	TK6

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	Articles by authors
	GENG Tao
	ZHAO Li-xin
	YAO Zong-lu
	SHEN Rui-xia
	YU Jia-dong
	LUO Juan

Cite this article:

GENG Tao,ZHAO Li-xin,YAO Zong-lu等. Characteristics and potential to strengthen anaerobic digestion of hydrochar[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5170-5180.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5170

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