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J Hazard Mater

Title:		Dynamics of changes in coplanar and indicator PCB in sewage sludge during mesophilic methane digestion
Author(s):		Rosinska A; Karwowska B;
Address:		"Department of Chemistry, Water and Wastewater Technology, Czestochowa University of Technology, Dabrowskiego 69 Str, 42-200 Czestochowa, Poland. Electronic address: rosinska@is.pcz.czest.pl. Department of Chemistry, Water and Wastewater Technology, Czestochowa University of Technology, Dabrowskiego 69 Str, 42-200 Czestochowa, Poland"
Journal Title:		J Hazard Mater
Year:		2017
Volume:		20160426
Issue:		Pt A
Page Number:		341 - 349
DOI:		10.1016/j.jhazmat.2016.04.016
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Research was conducted, which aim was to evaluate the influence of mesophilic methane digestion on degradation of coplanar and indicator PCB in sewage sludge, and on dynamics of changes of these congeners during the process. For the research, sewage sludge from a municipal wastewater treatment plant were used. Mesophilic digestion was conducted at the temperature of 36 degrees C+/-1 degrees C. The anaerobic stabilization processes of sewage sludge occurred correctly what was confirmed by appropriate values of pH, content of volatile fatty acids (VFA) and ratio of VFA to alkalinity. Biodegradation of organic compounds in sewage sludge was confirmed by the decrease in total solids (by 26%) and volatile solids (by 36%). Up to the 3rd day of the digestion process no statistically significant differences in concentration of both coplanar and indicator PCB was observed. During the following days of the process, an increase in lower chlorinated PCB concentration was demonstrated and a decrease in concentration of higher chlorinated congeners (penta-, hexa-, and heptachlorobiphenyls). After the digestion, a decrease in higher chlorinated congener concentration was found. Significant degradation was demonstrated for coplanar PCB 169 (from 77.8 to 80.5%), and indicator PCB 180 (from 57.1 to 90.3%) and PCB 153 (from 60.4 to 79.2%)"
Keywords:		"Aerobiosis Biodegradation, Environmental Bioreactors Chlorine/chemistry Fatty Acids, Volatile/analysis Hydrogen-Ion Concentration Methane/*chemistry Polychlorinated Biphenyls/*analysis Sewage/*analysis Temperature Waste Disposal, Fluid Degradation Methane;"
Notes:		"MedlineRosinska, A Karwowska, B eng Netherlands 2016/05/12 J Hazard Mater. 2017 Feb 5; 323(Pt A):341-349. doi: 10.1016/j.jhazmat.2016.04.016. Epub 2016 Apr 26"