کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
588103 1453336 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Start-up of dry anaerobic digestion system for processing solid poultry litter using adapted liquid inoculum
ترجمه فارسی عنوان
راه اندازی سیستم هضم بی هوازی خشک برای پردازش بستر طیور جامد با استفاده از تلقیح مایع اقتباس شده
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی


• Treatment of poultry litter (PL) at higher solid content of above 15% is limited.
• Low-temperature treatment of solid PL with high nitrogen has been scarcely reported.
• Tested the adapted liquid inoculum to start the solid dry anaerobic digester (DAD).
• Higher total Kjeldahl nitrogen concentrations (>30 g/L) in PL inhibited the DAD.

The objective is to obtain the basic design criteria for starting up dry anaerobic-digestion (DAD) systems treating solid-poultry-litter (PL) with hay-bedding (TSmixture: 68.6%) using adapted liquid inoculum. Effect of organic loading rates (OLR) and mode of operation (particularly psychrophilic liquid inoculum recirculation-percolation mode) were evaluated in two phases; such that OLR of 5.4 and 21.6 gVS/kginoculumVS/d were maintained respectively for Phase-1 and-2; and top-down and down-up mode of liquid-inoculum recirculation into DAD-system were experimented. Digesters were operated at psychrophilic-temperature (@20 °C) with cycle length of 26 and 38 d for Phase-1 and -2, respectively. Results show that specific methane yield of 0.147–0.162 L/gVSfed was obtained for Phase-1 with a methane content of 35–39%; whereas Phase-2 had 61–70% lower yields compared to Phase-1. Though PL-digestion was possible at OLR <5.4 g VS/kginoculumVS/d, high nitrogen-content in PL inhibited the digestion process especially at higher OLR. However, adapted inoculum to TKN of >20 g/L could minimize the inhibition. Top-down-recirculation is recommended for simpler operation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 102, July 2016, Pages 495–502
نویسندگان
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