This study focuses on the kinetics of volatile solids (VS) biodegradation of the biodrying process using pulp and paper secondary sludge. The experiments were carried out with air-flow rates of 0.51, 1.61, 3.25 and 5.26 L/min kgVS) and initial moisture content of 64–66% w.b. Using five kinetic models and a nonlinear regression method, kinetic parameters were estimated and the models were analyzed with two statistical indicators. Higher air-flow rates cause greater moisture content reduction, lower temper- ature in the matrix, and lower VS reduction. At an air-flow rate as high as 5.26 L/min kgVS there is no bio- drying but only convective drying. The kinetic models used successfully simulate the VS biodegradation under biodrying conditions, with a root mean square error (RMSE) between 0.007929 and 0.02744. In conclusion, we show forthe first timethat VS biodegradation in the biodrying process can besuccessfully modeled with a kinetic model. 2014 Elsevier Ltd. All rights reserved.
This study focuses on the kinetics of volatile solids (VS) biodegradation of the biodrying process using pulp and paper. Secondary sludge. The experiments were carried out with air - fl ow rates, of 0.51 1.61 3.25 and, 5.26 L / min kgVS) and initial. Moisture content of 64 - 66% W.B. Using fi ve kinetic models and a nonlinear regression method kinetic parameters, were estimated. And the models were analyzed with two statistical indicators. Higher air - fl ow rates cause greater moisture, content reduction. Lower temper - ature in, the matrix and lower VS reduction. At an air - fl ow rate as high as 5.26 L / min kgVS there is no bio -. Drying but only convective drying. The kinetic models used successfully simulate the VS biodegradation under, biodrying conditions. With a root mean square error (RMSE) between 0.007929 and 0.02744. In conclusion we show, forthe fi RST timethat VS biodegradation. In the biodrying process can besuccessfully modeled with a kinetic model. 2014 Elsevier Ltd. All rights reserved.
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