A new method for assessment of the sludge disintegration degree with the use of differential centrifugal sedimentation

Environmental Technology
Daniele SilvestriMiroslav Černík

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.

References

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Citations

Feb 28, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Klaudiusz GrübelMiroslav Černík
Jul 11, 2019·Environmental Science and Pollution Research International·Alicja MachnickaKrzysztof Sikora

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Methods Mentioned

BETA
physical treatment
light scattering

Software Mentioned

CPS
Disc Centrifuge Control System ( DCCS ) ’
STATISTICA

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