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http://dx.doi.org/10.17137/korrae.2021.29.4.41

Sewage sludge solubilization using ultrasonic combined with calcium peroxide  

Han, Jun-Hyuk (School of Civil & Environmental Engineering, Hankyong National University)
Nam, Se-Yong (School of Civil & Environmental Engineering, Hankyong National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.4, 2021 , pp. 41-46 More about this Journal
Abstract
In order to investigate the degree of sewage sludge solubilizaion using ultrasonic(US) combined with calcium peroxide(CaO2), VSS reduction rate, solubilization rate, SCOD/VSS ratio, SCOD increasing rate, LB-EPS(Loosely-Bound EPS) and TB-EPS(Tightly-bound EPS) were measured. US was compared as a control. Solubilization rate increased by 23.4% under US and increased by 50.7% under US/CaO2(0.05 g CaO2/g VSS). and also, at the same conditions, VSS reduction rate increased by 7.1% and 17.7%, respectively. SCOD increasing rate from 10 to 90 minutes was 0.0151 min-1 under US/CaO2(0.02 g CaO2/g VSS). TB-EPS decreased by 36.4% under US and decreased by 59.0% under US/CaO2(0.05 g CaO2/g VSS). TB-EPS decreased during first 10 minutes and then decreased slowly until 90 minutes. There was no significant difference in TB-EPS decrease according to the dosage of calcium peroxide.
Keywords
Calcium peroxide; sewage sludge; Solubilization; Extracllular polymeric substance;
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