کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5756988 1622625 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of the anaerobic co-digestion of pasteurized slaughterhouse waste, pig slurry and glycerine
ترجمه فارسی عنوان
بهینه سازی هضم بی هوازی از زباله های کشتارگاه پاستوریزه، دوغاب خوک و گلیسیرین
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
The feasibility of co-digestion of blends of two different animal by-products (pig manure and pasteurized slaughterhouse waste) and recovered glycerine was studied in mesophilic conditions. Experiments were performed in a lab-scale CSTR along 490 days, with a hydraulic retention time of 21-33 days and with a step-wise increased organic loading rate, by adding and/or changing the wastes ratio, from 0.8 to 3.2 kgCOD m−3 d−1. The best methane production rate (0.64 Nm3CH4 m−3 d−1) represented an increment of 2.9-fold the initial one (0.22 Nm3CH4 m−3 d−1 with pig manure solely). It was attained with a ternary mixture composed, in terms of inlet volatile solids, by 35% pig slurry, 47% pasteurized slaughterhouse waste and 18% glycerine. This blend was obtained through a stepwise C/N adjustment: this strategy led to a more balanced biodegradation due to unstressed bacterial populations through the performance, showed by the VFA-related indicators. Besides this, an improved methane yield (+153%) and an organic matter removal efficiency (+83%), regarding the digestion of solely pig slurry, were attained when the C/N ratio was adjusted to 10.3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 61, March 2017, Pages 521-528
نویسندگان
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