کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4997283 1459905 2017 37 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of alkaline pretreatment on mesophilic and thermophilic anaerobic digestion of a submerged macrophyte: Inhibition and recovery against dissolved lignin during semi-continuous operation
ترجمه فارسی عنوان
اثر پیشگیری از قلیایی بر هضم بی هوازی مازوفیلی و ترموفیلیک ماکروفیت غوطه ور: مهار و بازیابی در برابر لیگنین حل شده در طول عملیات نیمه مداوم
کلمات کلیدی
هضم بی هوازی ماکروفیت آبزی، پیشگیری از قلیایی، انعطاف پذیری، هضم مزانوفیل / ترموفیل،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The long-term effect of alkaline pretreatment on semi-continuous anaerobic digestion (AD) of the lignin-rich submerged macrophyte Potamogeton maackianus was investigated using mesophilic and thermophilic conditions. In pretreated reactors, dissolved lignin accumulated to high levels. CH4 production under the pretreated condition was higher than that of the untreated condition, but decreased from Days 22 (mesophilic) and 42 (thermophilic). However, CH4 production subsequently recovered, although dissolved lignin accumulated. Further, the change in the microbial community was observed between conditions. These results suggest that dissolved lignin temporarily inhibited AD, although acclimatization to dissolved lignin occurred during long-term operation. During the steady state period, mesophilic conditions achieved a 42% increase in the CH4 yield using pretreatment, while thermophilic conditions yielded an 8% increment. Because volatile fatty acids accumulated even after acclimatization during the thermophilic pretreated condition and was discharged with the effluent, improvement of the methanogenic step would enable enhanced CH4 recovery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 238, August 2017, Pages 666-674
نویسندگان
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