کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4997506 1459910 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In-situ biogas upgrading with pulse H2 additions: The relevance of methanogen adaption and inorganic carbon level
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
In-situ biogas upgrading with pulse H2 additions: The relevance of methanogen adaption and inorganic carbon level
چکیده انگلیسی


- Energy storage via biomethanisation may benefit from previous H2 injections.
- Low CO2 levels may inhibit hydrogenotrophic methanogens.
- Acetate may act as storage during conditions unfavorable for biomethanisation.
- The reactor inorganic carbon level was an indicator of reactor stability.

Surplus electricity from fluctuating renewable power sources may be converted to CH4 via biomethanisation in anaerobic digesters. The reactor performance and response of methanogen population of mixed-culture reactors was assessed during pulsed H2 injections. Initial H2 uptake rates increased immediately and linearly during consecutive pulse H2 injections for all tested injection rates (0.3 to 1.7 LH2/Lsludge/d), while novel high throughput mcrA sequencing revealed an increased abundance of specific hydrogenotrophic methanogens. These findings illustrate the adaptability of the methanogen population to H2 injections and positively affects the implementation of biomethanisation. Acetate accumulated by a 10-fold following injections exceeding a 4:1 H2:CO2 ratio and may act as temporary storage prior to biomethanisation. Daily methane production decreased for headspace CO2 concentrations below 12% and may indicate a high sensitivity of hydrogenotrophic methanogens to CO2 limitation. This may ultimately decide the biogas upgrading potential which can be achieved by biomethanisation.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 233, June 2017, Pages 256-263
نویسندگان
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