Application Status of Anaerobic Digestion Technology in Treatment of Organic Waste

doi:10.11924/j.issn.1000-6850.casb2023-0854

Abstract

Abstract:

This study focuses on evaluating the application of anaerobic digestion technology in the treatment of organic waste, conversion into renewable energy and organic fertilizers, and exploring the mitigation effects of that on the environment. The effects of temperature, carbon to nitrogen ratio, organic loading rate, volatile fatty acids, hydraulic residence time and pH on the efficiency and stability of anaerobic digestion were analyzed by literature review. The results show that these parameters have significant effects on promoting microbial activity, accelerating organic decomposition and maintaining stable operation of the system. The effectiveness of anaerobic digestion technology is verified by the typical studies of organic wastes such as corn stalks, livestock manure and food waste, and the structure and function of key microbial communities in the process are elaborated, including the mechanisms of action of bacteria and archaea at different stages such as hydrolysis, acidification, acetogenesis and methanogenesis. In addition, the generation of toxic substances and its management strategies are also discussed. Finally, the findings of this study suggest that improving the efficiency of anaerobic digestion, developing new reactor technologies, and strengthening research on microbial population will help make anaerobic digestion technology more efficient, stable, and widely applied in the future.

Key words: anaerobic digestion, organic waste, resource recycling, environmental pollution, microbial community, toxic substances management, temperature, carbon nitrogen ratio, organic load rate, volatile fatty acids, hydraulic retention time, pH

WANG Zhaoxuan, AO Guoxu, GE Jingping, SUN Shanshan, LING Hongzhi. Application Status of Anaerobic Digestion Technology in Treatment of Organic Waste[J]. Chinese Agricultural Science Bulletin, 2024, 40(20): 84-91.

Figures/Tables 4

References 52

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厌氧消化阶段	参与的主要细菌	参与的主要古菌
水解阶段	Firmicutes、Bacteroides	-
产酸阶段	Clostridium、Butyrivibrio、Bifidobacterium	-
产乙酸阶段	Syntrophomonas、Syntrophobacter、Clostridium	-
产甲烷阶段	-	Methanobacterium、Methanosarcina

厌氧消化阶段	参与的主要细菌	参与的主要古菌
水解阶段	Firmicutes、Bacteroides	-
产酸阶段	Clostridium、Butyrivibrio、Bifidobacterium	-
产乙酸阶段	Syntrophomonas、Syntrophobacter、Clostridium	-
产甲烷阶段	-	Methanobacterium、Methanosarcina