کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
679257 1459938 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enrichment of specific electro-active microorganisms and enhancement of methane production by adding granular activated carbon in anaerobic reactors
ترجمه فارسی عنوان
غنی سازی میکروارگانیسم های الکترواستاتیک خاص و افزایش تولید متان با افزودن کربن فعال دانه ای در راکتورهای بی هوازی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• GAC supplementation significantly increased methane production.
• Increased methane production was mainly due to biomass attached to GAC.
• Geobacter, Methanospirillum, and Methanolinea were enriched on GAC.
• Direct interspecies electron transfer via GAC was generated.

Direct interspecies electron transfer (DIET) via conductive materials can provide significant benefits to anaerobic methane formation in terms of production amount and rate. Although granular activated carbon (GAC) demonstrated its applicability in facilitating DIET in methanogenesis, DIET in continuous flow anaerobic reactors has not been verified. Here, evidences of DIET via GAC were explored. The reactor supplemented with GAC showed 1.8-fold higher methane production rate than that without GAC (35.7 versus 20.1 ± 7.1 mL-CH4/d). Around 34% of methane formation was attributed to the biomass attached to GAC. Pyrosequencing of 16S rRNA gene demonstrated the enrichment of exoelectrogens (e.g. Geobacter) and hydrogenotrophic methanogens (e.g. Methanospirillum and Methanolinea) from the biomass attached to GAC. Furthermore, anodic and cathodic currents generation was observed in an electrochemical cell containing GAC biomass. Taken together, GAC supplementation created an environment for enriching the microorganisms involved in DIET, which increased the methane production rate.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 205, April 2016, Pages 205–212
نویسندگان
, , ,