کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4472069 1315056 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of different particle size distributions on anaerobic digestion of the organic fraction of municipal solid waste
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Impact of different particle size distributions on anaerobic digestion of the organic fraction of municipal solid waste
چکیده انگلیسی

Particle size may significantly affect the speed and stability of anaerobic digestion, and matching the choice of particle size reduction equipment to digester type can thus determine the success or failure of the process. In the current research the organic fraction of municipal solid waste was processed using a combination of a shear shredder, rotary cutter and wet macerator to produce streams with different particle size distributions. The pre-processed waste was used in trials in semi-continuous ‘wet’ and ‘dry’ digesters at organic loading rate (OLR) up to 6 kg volatile solids (VS) m−3 day−1. The results indicated that while difference in the particle size distribution did not change the specific biogas yield, the digester performance was affected. In the ‘dry’ digesters the finer particle size led to acidification and ultimately to process failure at the highest OLR. In ‘wet’ digestion a fine particle size led to severe foaming and the process could not be operated above 5 kg VS m−3 day−1. Although the trial was not designed as a direct comparison between ‘wet’ and ‘dry’ digestion, the specific biogas yield of the ‘dry’ digesters was 90% of that produced by ‘wet’ digesters fed on the same waste at the same OLR.


► Method and extent of particle size reduction affected digester operation.
► A smaller mean particle size did not necessarily lead to improved performance.
► Use of macerated material in wet digesters caused foaming due to gas entrainment.
► Coarser material was successfully treated in dry digesters.
► Finer shredded and rotary cut material acidified in dry digesters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 33, Issue 2, February 2013, Pages 297–307
نویسندگان
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