Research Center in Technology of Products and Chemical Processes, PRO(2)TECS-Chemical Engineering Department, Campus "El Carmen", University of Huelva, Huelva, Spain.
Research Center in Technology of Products and Chemical Processes, PRO(2)TECS-Chemical Engineering Department, Campus "El Carmen", University of Huelva, Huelva, Spain.
J Environ Manage. 2019 May 15;238:153-158. doi: 10.1016/j.jenvman.2019.02.125. Epub 2019 Mar 6.
MSW compost valorization under combustion, at two different composting process conditions, have been studied by thermogravimetric analysis (TGA). The composting operating parameters such as aeration and moisture affect the biodegradability of compost and results of the combustion (different gross heating values for each reactors). The obtained TGA showed that maximum weight loss for 10-12% (245-247 °C), 32-34% (407-411 °C) and 44-46% (760-769 °C) in correspondence to hemicellulose, cellulose and lignin-humic-fulvic acids decomposition for each reactor are observed. Obtained valued in kinetic study (Flynn-Wall-Ozawa method) results in suitable coefficients of determination. In that form, to establish the assumption that combustion of compost under a first-order reaction may be appropriate. Moreover, in both reactors, the conversion rate increased and the activation energy decreased with composting time is found. The maximum gross heating value versus minimum activation energy (for α = 0.25 and α = 0.5) corresponds to final composts and under aeration of 0.050 and 0.175 L kg d and moisture of 40% and 55% for R1 and R2 reactors respectively. For MSW, under proper conditions, composting could be used as a suitable biodrying process, stabilizing and concentrating the heating value.
采用热重分析（TGA）研究了在两种不同堆肥工艺条件下，燃烧条件下 MSW 堆肥的增值。堆肥的操作参数（如曝气和水分）会影响堆肥的生物降解性和燃烧的结果（每个反应器的总热值不同）。获得的 TGA 表明，对于每个反应器，最大失重出现在半纤维素、纤维素和木质素-腐殖酸-富里酸分解对应的 10-12%（245-247°C）、32-34%（407-411°C）和 44-46%（760-769°C）。在动力学研究（Flynn-Wall-Ozawa 法）中获得的价值得到了合适的决定系数。在这种形式下，可以建立这样的假设，即堆肥的燃烧可能适合一级反应。此外，在两个反应器中，随着堆肥时间的增加，转化率增加，活化能降低。最大总热值与最小活化能（α=0.25 和 α=0.5）对应于最终堆肥，在 R1 和 R2 反应器中，曝气分别为 0.050 和 0.175 L kg d，水分分别为 40%和 55%。对于 MSW，在适当的条件下，堆肥可以作为一种合适的生物干燥过程，稳定和浓缩热值。
