کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7079987 1459995 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrolysis and acidification of dewatered sludge under mesophilic, thermophilic and extreme thermophilic conditions: Effect of pH
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Hydrolysis and acidification of dewatered sludge under mesophilic, thermophilic and extreme thermophilic conditions: Effect of pH
چکیده انگلیسی
This study investigated the effect of pH (uncontrolled, 8.0, 10.0 and 12.0) and temperature (mesophilic, thermophilic and extreme thermophilic) on hydrolysis and acidification of dewatered sludge in 7-day batch fermentation experiment. Solublization of COD, protein and carbohydrates as well as concentration and composition of VFAs were investigated. Sludge hydrolysis was enhanced with higher pH and temperature. The maximum SCOD, soluble protein and carbohydrates was observed at pH 12.0 at extreme thermophilic condition. The maximum VFAs yield was obtained at thermophilic and was 2.15 times that at mesophilic condition, but it took more time to reach the maximum. The VFAs consisted of acetic, propionic, iso-butyric, n-butyric, iso-valeric, and n-valeric acids, and acetic acid was the prevalent product in most cases except for uncontrolled pH and pH 8.0 at mesophilic condition. The methane production was as follows: pH 8.0 > pH 10.0 > uncontrolled (0.015) > pH 12.0; mesophilic > thermophilic > extreme thermophilic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 148, November 2013, Pages 461-466
نویسندگان
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