Evaluation on the treatment processes for pathogens removal in wastewater reclamation and reuse

This research focused on the investigation on the removal efficiency of pathogenic bacteria and human viruses to produce safe wastewater reclamation and reuse for agricultural purposes. Under existing wastewater treatment processes, only 1-2 logs removal could be achieved of various targets of pathogens. Therefore, further treatment was required to comply with the water reuse guideline established by World Health Organization (WHO). Investigations were conducted using model microorganisms to evaluate the performance of advance treatment technology including ultraviolet (UV) and ozonation (O₃). A few logs reduction could be achieved with minimum dose of UV and ozonation. This research concluded that UV and ozonation could achieve 2-5logs pathogen removal for wastewater reclamation and reuse suitable for agriculture activity.