水热炭特性及强化厌氧发酵潜力研究进展

耿涛; 赵立欣; 姚宗路; 申瑞霞; 于佳动; 罗娟

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中国环境科学 ›› 2023, Vol. 43 ›› Issue (10) : 5170-5180.

水污染与控制

水热炭特性及强化厌氧发酵潜力研究进展

耿涛, 赵立欣, 姚宗路, 申瑞霞, 于佳动, 罗娟

作者信息 +

Characteristics and potential to strengthen anaerobic digestion of hydrochar

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

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摘要

厌氧发酵技术可以对作物秸秆，畜禽粪便，市政污泥等有机废弃物进行清洁转化，生成的沼气，沼渣和沼液在能源，农业，环保等领域有极大的应用价值.但目前厌氧发酵技术仍存在停滞期长，发酵过程中微生物活性受氨氮和有机酸等代谢产物与微塑料，酚类等有毒物质抑制，沼气中甲烷含量低等问题.水热炭是生物质在高温密闭环境以及亚临界水的作用下发生热化学反应得到的固体产物，具有丰富的孔隙结构和表面含氧官能团，是一种新兴的多功能炭基材料.厌氧发酵体系中适量添加水热炭能够有效缩短停滞期，缓解不同物质的抑制效应，促进微生物种间电子传递，增强甲烷生成等，具有综合的强化效果.对水热炭理化特性以及水热炭强化厌氧发酵的作用方式与机理进行了解，有利于进一步开展水热炭强化厌氧发酵以及农业废弃物高效厌氧处理的研究与应用.

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.

导出引用

耿涛, 赵立欣, 姚宗路, 申瑞霞, 于佳动, 罗娟. 水热炭特性及强化厌氧发酵潜力研究进展[J]. 中国环境科学. 2023, 43(10): 5170-5180

GENG Tao, ZHAO Li-xin, YAO Zong-lu, SHEN Rui-xia, YU Jia-dong, LUO Juan. Characteristics and potential to strengthen anaerobic digestion of hydrochar[J]. China Environmental Science. 2023, 43(10): 5170-5180

中图分类号： X705 S216.4 TK6

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