Particle Size Analysis and Ultrasound Pre-treatment of Sludge

作者：Martinez E J^*; Fierro J; Moreno R; Gomez X

来源：Journal of Residuals Science & Technology, 2013, 10(2): 93-98.

The objective of this work was to measure the modification taking place in particle size distribution during the course of batch digestion experiments of primary and secondary sludge and also to evaluate the effect of ultrasound pre-treatment on secondary sludge. Sewage sludge used in this study was obtained from the WWTP of Leon. Secondary sludge was pre-conditioned applying ultrasound at different energy ranges in order to investigate behavior of sludge in the anaerobic biodegradation process with respect to particle size and pretreatment. Pre-treatment of secondary sludge resulted in a decrease of mean particle size and enhanced biogas production at sonication with 2500 kJ/Kg ST when compared to digestion results obtained from secondary sludge. Application of an elevated range of energy resulted in a decrease of biogas production.

• 出版日期2013-4