醌呼吸影响厌氧消化产CO2/CH4及转化有毒物质的研究  

The effect of quinone respiration on CO_2/CH_4 production and transformation of toxic substances in anaerobic digestion

作　　者：宋佳秀[1] 任南琪[2] 钱东旭 陆一凡[1] 徐怡[1] 

机构地区：[1]上海师范大学生命与环境科学学院,环境科学与工程系,上海200234 [2]哈尔滨工业大学市政与环境工程学院,黑龙江哈尔滨150090

出　　处：《中国环境科学》2014年第5期1236-1241,共6页China Environmental Science

基　　金：国家自然科学基金青年基金项目(51208302);教育部博士点新教师基金(20123127120008);上海市教育委员会科研创新项目(12YZ083)

摘　　要：利用蒽醌-2,6,-双磺酸（AQDS）为模式物在厌氧消化过程中富集醌呼吸微生物,考察了富集产物厌氧消化同步醌呼吸的产气特性和对有毒物质的转化.结果发现,富集产物具有较强的腐殖质还原能力,CO2：CH4为1.7,高于未富集污泥；不同来源的腐殖质因其具有不同的分子结构和醌功能基团数量,对污泥的醌呼吸的促进作用有所差别,而可从还原性腐殖质接受电子的 Fe（III）可显著加强醌呼吸速率；醌呼吸微生物在pH4.5~6条件下获得较高活性,说明此时醌呼吸对厌氧消化贡献较大；富集产物以乙酸为电子供体时可快速转化苯和三氯乙烯,27h的转化率分为85.9%和82.2%,并可以苯为电子供体以三氯乙烯为电子受体同时降解苯和还原三氯乙烯,30h 内的转化率分别为81.7%和68.8%.In this study, anthraquinone-2 ,6 ,-disulfonic acid （AQDS） was employed as a model substance to enrich the quinone respiration bacteria in the process of anaerobic digestion. The characteristics of gas production were investigated as well as the toxic substance conversion in sludge by enriched quinone respiration bacteria . A high humus reducing capacity for enriched anaerobic sludge was verified with a high ratio of CO2：CH4=1.7. The quinone respiration rate was found to vary while adding different sources of humus which can be attributed to different molecular structures and numbers for quinone functional groups. Fe （III）, which is able to accept electron from a reductive humus, can significantly enhance quinone respiration rate. Quinone respiration in pH （4.5~6） showed the results of higher activity which indicated that at this pH, quinone respiration is likely to contribute more to anaerobic digestion. Enriched sludge can rapidly convert benzene and richlorethylene into CO2 with acetate as an electron donor. For example, the conversion rates were up to 85.9%and 82.2%in 27h which can also oxidize benzene as an electron donor and deoxidize trichlorethylene as electron acceptor simultaneously, whose conversion rates were about 81.7%and 68.8%within 30h.

关 键 词：腐殖质还原 蒽醌-2 6-双磺酸 醌呼吸 

分 类 号：X703.1[环境科学与工程—环境工程]