水热炭与共基质对苯酚厌氧降解的影响  

Effects of hydrochar and co-substrate on phenol anaerobic degradation

作　　者：邵钱祺 罗涛 张士成[1,2,3] 罗刚 SHAO Qianqi;LUO Tao;ZHANG Shicheng;LUO Gang(Department of Environmental Science and Engineering,Fudan University,Shanghai 200438,China;Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes,Shanghai 200438,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China;Shanghai Jianke Environmental Technology Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]复旦大学环境科学与工程系,上海200438 [2]上海市有机废弃物污染控制与资源化专业技术服务平台,上海200438 [3]上海市污染控制与生态安全研究院,上海200092 [4]上海建科环境技术有限公司,上海200032

出　　处：《能源环境保护》2024年第1期119-127,共9页Energy Environmental Protection

基　　金：国家自然科学基金资助项目(31970117)。

摘　　要：厌氧消化(Anaerobic Digestion, AD)是一种可持续的生物技术,目前已应用于有机废物的处理。难降解的酚类化合物是厌氧消化过程中存在的主要毒性物质之一。本研究探究了水热炭与共基质(葡萄糖)同时添加对苯酚厌氧降解的影响。结果表明,水热炭和共基质的添加缩短了苯酚厌氧消化的延滞期,使其从对照组的77.5 d缩短到了24.6~59.3 d。同时添加水热炭和共基质时,最高产甲烷速率R_(m)从3.53 mL/d提高到了4.86~6.80 mL/d,当只添加共基质且共基质浓度过高时,R_(m)下降。最适的葡萄糖共基质添加浓度为1.0~2.0 g/L,高浓度葡萄糖环境可能富集了其它竞争性微生物,使得苯甲酸降解菌和耗乙酸产甲烷菌受到一定抑制。水热炭也有利于富集苯甲酸降解菌,但葡萄糖共基质浓度对群落组成的影响在水热炭存在下会被减弱。本研究利用水热炭和共基质强化苯酚厌氧降解,为苯酚厌氧消化效能提升提供了新思路。Anaerobic digestion(AD)is a sustainable biotechnology,which has been applied in the treatment of organic waste.Refractory phenolic compounds,as the main toxic substances in the anaerobic digestion process,usually undergo complex and slow degradation.The addition of hydrochar and co-substrates has been found to effectively enhance the efficiency of phenol anaerobic digestion.This study investigated the simultaneous addition of hydrochar and co-substrates and its impact on anaerobic degradation of phenol.Results indicated that the addition of hydrochar and co-substrates reduced the lag phase of phenol anaerobic digestion,shortening it from 77.5 days in the control to 24.6~59.3 days.When hydrochar and co-substrates were added simultaneously,the maximum methane production rate(R_(m))increased from 3.53 mL/d to 4.86~6.80 mL/d.However,when only co-substrates were added and the concentration was too high,it hindered the stimulation of R_(m).The optimal concentration for glucose co-substrate addition was approximately between 1.0 and 2.0 g/L.A high concentration of glucose in the environment might enrich other competitive microorganisms,leading to the inhibition of benzoic acid-degrading bacteria and acetate-consuming methane-producing bacteria.Hydrochar also promoted the enrichment of benzoic acid degraders,but the influence of glucose co-substrate concentration on community composition was mitigated in the presence of hydrochar.This study utilized hydrochar and co-substrates to enhance anaerobic degradation of phenol,providing a novel approach to improve the efficiency of phenol anaerobic digestion.

关 键 词：水热炭 苯酚降解 共代谢 厌氧消化 微生物群落 

分 类 号：X703[环境科学与工程—环境工程]