کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1712577 1013147 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Composting of dairy cattle manure using a thermophilic–mesophilic sequence
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Composting of dairy cattle manure using a thermophilic–mesophilic sequence
چکیده انگلیسی

A thermophilic–mesophilic sequence of composting was compared with continuous thermophilic composting in a small-scale laboratory reactor. Dairy cattle manure was allowed to self-heat adiabatically for one week prior to individual temperature treatments at 20, 37, and 55 °C. Preliminary self-heating was carried out to naturally activated indigenous compost microorganisms to attain thermophilic condition. Microbial activity during composting was monitored by measuring oxygen uptake rate (OUR). Total active microbial biomass was measured using the adenosine triphosphate (ATP) bioluminescence technique. Organic matter degradation was determined by measuring the volatile solids content of compost samples. Results showed that composting at 55 °C promotes the rapid degradation of organic matter as shown by high cumulative oxygen uptake. Composting at 37 °C also exhibited high microbial activity probably due to degradation of complex organic compounds. Microbial biomass was found to be high at 20 and 37 °C, indicating larger microbial communities at lower compost temperatures. Organic matter degradation analysis revealed no large differences in the final solid degradation rate at 55 and 37 °C. The study suggests the importance of a thermophilic–mesophilic sequence in composting to maximise the extent of organic matter degradation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosystems Engineering - Volume 98, Issue 2, October 2007, Pages 198–205
نویسندگان
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