Abstract: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.
宋佳秀, 任南琪, 钱东旭, 陆一凡, 徐怡. 醌呼吸影响厌氧消化产CO2/CH4及转化有毒物质的研究[J]. 中国环境科学, 2014, 34(5): 1236-1241.
SONG Jia-Xiu, REN 南Qi, QIAN Dong-Xu, LU Yi-Fan, XU Yi. The effect of quinone respiration on CO2/CH4 production and transformation of toxic substances in anaerobic digestion. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(5): 1236-1241.