A new method for assessment of the sludge disintegration degree with the use of differential centrifugal sedimentation. Issue 23 (15th October 2019)

• Record Type: Journal Article
• Authors: Silvestri, Daniele; Wacławek, Stanisław; Gončuková, Zuzanna; Padil, Vinod V.T.; Grübel, Klaudiusz; Černík, Miroslav
• Is Part Of: Environmental technology. Volume 40:Issue 23(2019)
• Page Start: 3086
• Page End: 3093
• Publication Date: 2019-10-15
• Subjects: WAS disintegration -- differential centrifugal sedimentation -- disintegration degree -- chemical oxygen demand -- sludge particle size; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2018.1477839
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: A novel method for assessing the disintegration degree (DD) of waste activated sludge (WAS) with the use of differential centrifugal sedimentation method (DCS) was shown herein. The method was validated for a WAS sample at four levels of disintegration in the range of 14.4–82.6% corresponding to the median particle size range of 8.5–1.6 µm. From the several sludge disintegration methods used (i.e. microwave, alkalization, ultrasounds and peroxydisulfate activated by ultrasounds), the activated peroxydisulfate disintegration resulted in the greatest DD 83% and the smallest median particle size of WAS. Particle size distribution of pretreated sludge, measured by DCS, was in a negative correlation with the DD, determined from soluble chemical oxygen demand (SCOD; determination coefficient of 0.995). Based on the obtained results, it may be concluded that the DCS analysis can approximate the WAS disintegration degree. GRAPHICAL ABSTRACT: