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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Reactor performance and microbial community dynamics during anaerobic co-digestion of municipal wastewater sludge with restaurant grease waste at steady state and overloading stages
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Reactor performance and microbial community dynamics during anaerobic co-digestion of municipal wastewater sludge with restaurant grease waste at steady state and overloading stages

机译：稳态和超负荷阶段厌氧消化市政污水污泥与饭店油脂废物的共消化过程中的反应器性能和微生物群落动态

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摘要

Linkage between reactor performance and microbial community dynamics was investigated during mesophilic anaerobic co-digestion of restaurant grease waste (GTW) with municipal wastewater sludge (MWS) using 10 L completely mixed reactors and a 20 day SRT. Test reactors received a mixture of GTW and MWS while control reactors received only MWS. Addition of GTW to the test reactors enhanced the biogas production and methane yield by up to 65% and 120%, respectively. Pyrosequencing revealed that Methanosaeta and Methanomicrobium were the dominant acetoclastic and hydrogenotrophic methanogen genera, respectively, during stable reactor operation. The number of Methanosarcina and Methanomicrobium sequences increased and that of Methanosaeta declined when the proportion of GTW in the feed was increased to cause an overload condition. Under this overload condition, the pH, alkalinity and methane production decreased and VFA concentrations increased dramatically. Candidatus cloacamonas, affiliated within phylum Spirochaetes, were the dominant bacterial genus at all reactor loadings.
机译：在使用10升完全混合反应器和20天SRT的饭店油脂废物（GTW）与市政废水污泥（MWS）的中温厌氧共消化过程中，研究了反应堆性能与微生物群落动力学之间的联系。测试反应堆只接受了GTW和MWS的混合，而对照反应堆只接受了MWS。在测试反应器中添加GTW分别使沼气产量和甲烷产率分别提高了65％和120％。焦磷酸测序表明，在稳定的反应堆运行过程中，甲烷菌属和甲烷菌属分别是占主导地位的乙酰碎屑菌和氢营养型甲烷菌属。当饲料中GTW的比例增加而导致超载时，甲烷菌和甲烷菌的数量增加，甲烷菌的数量减少。在这种超负荷条件下，pH，碱度和甲烷生成量下降，VFA浓度急剧增加。在所有反应堆负载下，属于螺旋藻门的梭菌假丝酵母是主要的细菌属。

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