کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8870376 1622615 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Fe0 addition on volatile fatty acids evolution on anaerobic digestion at high organic loading rates
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Effect of Fe0 addition on volatile fatty acids evolution on anaerobic digestion at high organic loading rates
چکیده انگلیسی
Excessive acidification frequently occurs in the anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) at high organic loading rates (OLR), due to the accumulation of non-acetic volatile fatty acids (VFA). In this study, the performance of Fe0 in enhancing various VFA production and metabolism was investigated. The butyric acid concentration in a high OLR reactor with Fe0 addition decreased from 7200 to 0 mg/L after a short lag phase, and the total VFA (TVFA) concentration also decreased substantially. The corresponding dominant acidogenesis type also changed from butyric type to propionic type fermentation. Furthermore, the CH4 yield of the reactor with added Fe0 was approximately 595 ml CH4/g VSadded, which was an increase of 41.7% compared with the biochemical methane potential (BMP) test results in controls without added ZVI. A microbial diversity analysis, using high throughput sequencing, showed that Methanofollis and Methanosarcina were dominant in terms of the archaeal structures of the Fe0 reactor at the butyric converting stage; however, Methanosaeta was predominant in the reactor during the control BMP test. These results suggested that Fe0 can convert non-acetic VFA to acetic VFA and improve the CH4 yield by enhancing the activity of methanogens.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 71, January 2018, Pages 719-727
نویسندگان
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