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Biogas yields point of view, the possibility of reusing excess sludge treated by thermal pretreatment for the purpose of improving the efficiency of the anaerobic digestion process has been investigated in recent year. Thermal pretreatment technology was considered as a pretreatment technique to improve excess sludge properties because of the solubilization of particulate organics. As a view point of sludge reduction and recycle, however, many researchers focused on the ability of particulate hydrolysis and COD solubilization under a high temperature, and few reports have addressed on the physical/chemical characteristics changing. This research was performed to evaluate the effects of a various temperature and chemical additives on carbon formation and fractionation in treated slurry from thermal pretreatment. Based on the results, it was revealed that oxidants injection and temperature changing have significantly caused the change of carbon fractions in slurry from thermal pretreament. Especially, it was considered that the efficiencies of particle hydrolysis increased with the increase of the reaction temperature. Low molecular weight(Mw < 350 g/mol) organic carbon formation increased with the increase of oxidants injection. It was expected that results of this research will provide an overview of the characteristics of thermal pretreatement for excess sludge reduction and recycle.

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Effect of H<sub>2</sub>O<sub>2</sub>Injection and Temperature Changing on the Organic Carbon Fraction in Chromatogram Dissolved Organic Carbon (CDOC) from Thermal Pretreatment

Effect of H2O2Injection and Temperature Changing on the Organic Carbon Fraction in Chromatogram Dissolved Organic Carbon (CDOC) from Thermal Pretreatment

Effect of H₂O₂Injection and Temperature Changing on the Organic Carbon Fraction in Chromatogram Dissolved Organic Carbon (CDOC) from Thermal Pretreatment