Sludge disinfection using electrical thermal treatment: The role of ohmic heating.

ABSTRACT: Electrical heating has been proposed as a potential method for pathogen inactivation in human waste sludge, especially in decentralized wastewater treatment systems. In this study, we investigated the heat production and E. coli inactivation in wastewater sludge using electrical thermal treatment. Various concentrations of NaCl and NH₄Cl were tested as electrolyte to enhance conductivity in sludge mixtures. At same voltage input (18V), sludge treated with direct current (DC) exhibited slower ascent of temperature and lower energy efficiencies for heat production comparing to that using alternate current (AC). However, DC power showed better performance in E. coli inactivation due to electrochemical inactivation in addition to thermal inactivation. Greater than 6log₁₀

SUBMITTER: Yin Z 

PROVIDER: S-EPMC5711000 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature