Evaluation of the Innovated Disinfection Process with High Dissolved CO₂

Abstract

A novel high-dissolved CO₂ device was developed for the disinfection of treated sewage wastewater. Several experiments were conducted regarding the waterborne pathogen inactivation rate, the treatment time and the disinfection target (several treated sewage wastewaters, canal and river water). The results indicated that different disinfection targets can lead to 2.8-3.0 log-inactivation of waterborne pathogens within 20 minutes of treatment under 0.3 MPa of pressure in the device. Results also showed that the suspended solid (SS) in raw water affected the disinfection efficiency.