کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8869461 1622608 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study of single- and two-phase anaerobic digestion of food waste under uncontrolled pH conditions
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
A comparative study of single- and two-phase anaerobic digestion of food waste under uncontrolled pH conditions
چکیده انگلیسی
This study compared single- versus two-phase systems for semi-continuous anaerobic digestion of food waste without pH control at varying organic loading rates (OLRs). The methanogenic reactors of both systems required trace element supplementation for stable operation at 3.0 g VS (volatile solids)/L∙d or higher OLRs. Under trace-element supplemented conditions, both systems achieved stable and efficient performance at OLRs up to 4.0 g VS/L∙d. The two-phase system outperformed the single-phase system at 1.0-4.0 g VS/L∙d OLRs, but it failed at an OLR of 5.0 g VS/L∙d. Meanwhile, the single-phase system maintained the stable performance and reached its maximum methane production at this OLR. These results suggest that a single-phase configuration is more advantageous for robust treatment of food waste without pH control at high organic and hydraulic loads. Hydrogenotrophic methanogens dominated the methanogen community throughout the experiment in both systems. Microbial community structure shifts correlated with reactor operation and performance characteristics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 78, August 2018, Pages 509-520
نویسندگان
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