کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
685287 889037 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of storage on characteristics and hygienic quality of digestates from four co-digestion concepts of manure and biowaste
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Effects of storage on characteristics and hygienic quality of digestates from four co-digestion concepts of manure and biowaste
چکیده انگلیسی

This study evaluated the effects of storage in northern winter conditions (5 °C) on the characteristics and nutrients separation of digestates from co-digestion of manure and biowaste as well as the hygienic quality of the digestates after digestion and storage. During 3–11 months’ storage average nitrogen losses and reductions of total solids (TS) and volatile solids (VS) were 0–15%. With some exceptions, soluble chemical oxygen demand (SCOD) had increased slightly (from ∼6.5 to ∼7.5 g/l) after 3 months’ storage, while after 9–11 months’ it had decreased from 8.3–11 to 5.6–8.4 g/l. The concentrations of Ptot and PO4-P in the separated liquid fractions decreased 40–57% after 3 months’ storage and 71–91% after 9 months’ storage compared to the initial concentrations. The methane potential losses during 9–11 months’ storage corresponded 0–10% of the total methane potential without storage. The hygienic quality of the digestates from the 55 °C reactor and during storage fulfilled the Animal By-Products Regulation (ABPR) demands while the 35 °C digestate contained 0–105 cfu/g of indicator bacteria (faecal coliforms, enterobacteria, enterococcus) and >10 cfu/g of spiked salmonella, which amounts decreased slowly during storage. Sulphite reducing clostridia was not affected by either digestion or storage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 99, Issue 15, October 2008, Pages 7041–7050
نویسندگان
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