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Determination of Bio-Oxidation Energy Released by Thermophiles in Secondary and Mixed Bio-Solids
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نویسنده
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Nosrat Mohsen ,Jalali Mehdi ,T.R. Sreekrishnan ,Shojaosadati Sayed Abbas
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منبع
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iranian journal of chemistry and chemical engineering - 2007 - دوره : 26 - شماره : 2 - صفحه:125 -130
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چکیده
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Reaction constants and heat release during thermophilic aerobic digestion of typical secondary and mixed sludges were determined. maximum reaction constant, determined by measuring the amounts of biodegradable volatile suspended solids (bvss) removed, occurred in the temperature range of 55-60 °c. measurement of heat releases were carried out, at the same range, by the aid of a temperature programmable logic controller (plc). an amount equal to 16.2 kj/g-cell was measured for secondary sludge digestion. the maximum amount of kinetic constant for secondary sludge (0.45 d ~]) was observed at temperature of 55 °c. addition of primary sludge to secondary sludges decreased kinetic constants due to stimulate ofbiomass growth. cell growth in mixed sludges provided an extra heat equal to 6.7 kj/g-cell generated. however, it decreased the overall rate of heat release compared to the rate in the secondary sludge digestion.
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کلیدواژه
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Biological waste treatment ,Heat release ,Thermophilic aerobic digestion ,Sludge
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آدرس
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tarbiat modares university, Department of Chemical Engineering, Biotechnology Group, ایران, tarbiat modares university, Department of Chemical Engineering, Biotechnology Group, ایران, Indian Institute of Technology (I.I. T), Department of Biochemical Engineering and Biotechnology, INDIA, tarbiat modares university, Department of Chemical Engineering, Biotechnology Group, ایران
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پست الکترونیکی
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mnosrati20@modares.ac. ir
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Authors
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