Research Progress on Relieving Effect of Exogenous Substances on Inhibition of Anaerobic Digestion by Polycyclic Aromatic Hydrocarbons

doi:10.11924/j.issn.1000-6850.casb2024-0741

Abstract

Abstract:

Anaerobic digestion, a widely utilized technology for the treatment of organic waste, offers the dual benefits of emission reduction and energy recovery. Anaerobic digestion is susceptible to various factors due to the complex biochemical reactions involved in the process. Polycyclic aromatic hydrocarbons (PAHs) are a class of refractory organic pollutants, which mainly come from human activities such as industrial wastewater, incomplete combustion of fossil fuels and automobile exhaust emissions. PAHs possess toxicity and adsorptive. In anaerobic digestion systems, it is necessary to find methods to reduce the content of PAHs in the substrate since PAHs often mix with other materials, influencing hydrolysis, acidification and methanogenesis, which hinder degradation of substrate and methane production. Compared to physical and chemical methods such as heating, adsorption and photolysis, adding exogenous substances to promote the removal of PAHs has the advantages of simplicity, lower cost and reduced secondary pollution. The paper reviewed the influencing factors of anaerobic digestion, the inhibitory effects of PAHs on anaerobic digestion and strategies to alleviate the inhibitory effects of PAHs by introducing different exogenous substances, aiming to provide references for further improving the anaerobic digestion technology.

Key words: polycyclic aromatic hydrocarbon, anaerobic digestion, exogenous substance, relieving effect

SUN Xiyuan, AO Guoxu, WANG Zhaoxuan, GE Jingping, LING Hongzhi, SUN Shanshan. Research Progress on Relieving Effect of Exogenous Substances on Inhibition of Anaerobic Digestion by Polycyclic Aromatic Hydrocarbons[J]. Chinese Agricultural Science Bulletin, 2025, 41(11): 74-81.

Figures/Tables 4

References 56

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生物炭名称	热解温度/℃	处理样本	处理效果	引用文献
腐殖酸生物炭	700	土壤	对萘、芘和苯并芘的去除率分别为34.2%、59.1%和81.5%	[42]
泥炭藓衍生生物炭	900	沉积物	PAHs的去除率73%	[43]
磁性丝瓜海绵生物炭	900	沉积物	PAHs去除率31.9%	[44]
水稻秸秆生物炭	600	土壤	PAHs的生物降解率比对照组提高了40.0%~60.3%	[45]
水葫芦衍生生物炭	700	PAHs标准品	PAHs的去除率74%	[46]

生物炭名称	热解温度/℃	处理样本	处理效果	引用文献
腐殖酸生物炭	700	土壤	对萘、芘和苯并芘的去除率分别为34.2%、59.1%和81.5%	[42]
泥炭藓衍生生物炭	900	沉积物	PAHs的去除率73%	[43]
磁性丝瓜海绵生物炭	900	沉积物	PAHs去除率31.9%	[44]
水稻秸秆生物炭	600	土壤	PAHs的生物降解率比对照组提高了40.0%~60.3%	[45]
水葫芦衍生生物炭	700	PAHs标准品	PAHs的去除率74%	[46]

电子受体	处理样本	PAHs降解率	引用文献
硝酸盐	含萘的污泥	提高30.1%	[50]
磁铁矿	含PAHs的污泥	从79.75%提高到89.3%	[51]
碳毡	含芘和菲沉积物	芘、菲分别提高27.3%和32.5%	[52]

电子受体	处理样本	PAHs降解率	引用文献
硝酸盐	含萘的污泥	提高30.1%	[50]
磁铁矿	含PAHs的污泥	从79.75%提高到89.3%	[51]
碳毡	含芘和菲沉积物	芘、菲分别提高27.3%和32.5%	[52]