Chemical and Biochemical Process Technology and Control Section, Department of Chemical Engineering, KU Leuven, Willem De Croylaan 46, B-3001 Heverlee, Belgium.
Bioresour Technol. 2013 Jan;128:598-603. doi: 10.1016/j.biortech.2012.11.007. Epub 2012 Nov 10.
Anaerobic digestion is widely applied for the recovery of energy from waste activated sludge. Pre-treatment methods are of high interest to increase the biodegradability of the sludge and to enhance the digestion efficiency. This paper studies the application of a microwave pre-treatment. An experimental set-up of two pilot scale semi-continuous digesters was used. During a long term experiment, one of the reactors was fed with untreated sludge, while microwave pre-treated sludge (336 kJ/kg sludge) was introduced in the second one. A solid retention time of 20 days was kept during the experiments. (Organic) dry solids, carbohydrates, proteins and volatile fatty acids were monitored during digestion. It was seen that the microwave pre-treatment resulted in an effective solubilization of the organic matter in the sludge. The changes to the sludge composition resulted in an increase in biogas production by 50%, while the methane concentration in both reactors remained stable.
厌氧消化被广泛应用于从废活性污泥中回收能源。预处理方法受到高度关注，以提高污泥的生物降解性并提高消化效率。本文研究了微波预处理的应用。使用了两个中试规模半连续消化器的实验装置。在长期实验中，一个反应器中加入未经处理的污泥，而在第二个反应器中加入微波预处理的污泥（336kJ/kg 污泥）。实验过程中保持固体停留时间为 20 天。在消化过程中监测了（有机）干固体、碳水化合物、蛋白质和挥发性脂肪酸。结果表明，微波预处理有效地溶解了污泥中的有机物。污泥成分的变化导致沼气产量增加了 50%，而两个反应器中的甲烷浓度保持稳定。
