کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1752925 1522554 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterizing microbial communities dedicated for conversion of coal to methane in situ and ex situ
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Characterizing microbial communities dedicated for conversion of coal to methane in situ and ex situ
چکیده انگلیسی


• Hydrogenotrophic methanogens were identified in formation water from a CBM well.
• Dominant species in the adapted consortium were different from those in the original community.
• The adapted consortium yielded a methane production rate of 5.6 ft3/ton-day.
• The adapted microbial consortium is aerotolerant.

To enhance methane production in situ in bituminous coal seams, distribution of microorganisms in the formation water collected from a coalbed methane well was investigated. Based on next generation DNA sequencing, both bacteria (231 species) and archaea (33 species) were identified. Among the bacterial kingdom, polymer-degrading, benzoate, fatty acid and sugar utilizing bacteria were dominant. Among the archaea domain, the major methanogens (89.8%) belonged to the order of Methanobacteriales which are hydrogenotrophic. To develop a microbial consortium for ex situ coal bioconversion, the original microbial community was adapted to ground coals for five months in a laboratory environment. DNA sequencing revealed the presence of 185 bacteria species and nine archaea species which were dramatically different from those in the original formation water. In particular, the majority (90.4%) of methanogens were under the order of Methanomicrobiales. To increase methane production, two nutrient solutions were tested. Solution #2 which targeted methanogens provided a methane yield of 111 ft3/ton in 20 days, which translated to a 5.6 ft3/ton-day. In addition, the adapted consortium was found to be aerotolerant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Coal Geology - Volume 146, 1 July 2015, Pages 145–154
نویسندگان
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