Methanotroph and methanogen coupling in granular biofilm under O2-limited conditions
Methanotroph and methanogen coupling in granular biofilm under O2-limited conditions
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限氧条件下颗粒生物膜中甲烷氧化菌和产甲烷菌的偶联
DOI：
10.1007/bf00140190
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发表时间：
1996
影响因子：
2.7
通讯作者：
Serge R. Guiot
中科院分区：
文献类型：
--
作者：
C. Shen;C. Míguez;D. Bourque;D. Groleau;Serge R. Guiot
在5 L好氧/厌氧耦合颗粒污泥反应器中，研究了严格好氧甲烷氧化菌Methylosinussporium与严格厌氧甲烷菌在限氧条件下的共培养。产甲烷菌具有很好的代谢活性，能够产生足够的甲烷作为甲烷营养菌生长的底物。在限氧条件下运行一个月后，颗粒污泥中的其它严格好氧菌群数量增加了两个数量级，但仅有少量甲烷氧化菌残留在污泥中。这一结果可能表明M.孢子缺乏足够的O2亲和性与兼性细菌竞争溶解的O2以供其生长。
The co-culture betweenMethylosinus sporium, a strictly aerobic methanotroph, and strictly anaerobic methanogens was studied in 5 L aerobic/anaerobic coupled granular sludge reactors under O2-limited conditions. The methanogenic bacteria maintained very good metabolic activities and were able to produce sufficient methane which serviced as substrate for methanotrophic growth. Although other strictly aerobic population proliferated by two orders of magnitude after the granular sludge had been operated under O2-limited conditions for one month, only a limited amount of the added methanotroph remained in the sludge. This result may indicate thatM. sporiumlacks sufficient O2affinity to compete with facultative bacteria for the dissolved O2for their growth.