Abstract
Inductively coupled plasma system was used in drinking water treatment system to kill the microorganisms in water such as total coliforms (TC), fecal coliforms (FC) and other coliforms (OC) from river water. The aim of this study was to investigate the effect of flowrate on removal efficiency (RE), death rate, and death yield and energy consumption of bacteria's. The frequency of the system was set at 4.6 MHz. The results show that the removal efficiencies and death rate of TC, FC and OC decreased with increasing flowrate. Compared to FC, the first-order reactions of TC and OC were lower in the following order: FC > OC > TC. The death yield of TC and OC significantly increased when the removal efficiency increased. The electromagnetic flux varied from 19.44 to 20.55 W/cm2 and the energy consumption was 0.26, 0.32, and 0.67 with flow rate at 20, 10 and 5 mL/minute, respectively. These results are very necessary to improve drinking water treatment.
Highlights
Kuranji River is a raw water source for the water treatment plant in Padang City, West Sumatra, Indonesia. In this river people wash, bathe and defecate. These activities cause concentrations of pathogenic bacteria, such as total coliforms and fecal coliforms are very high in water
Similar results were found with the flow rate at 10 and 20 mL/minute (Fig. 2b and 2c). This is due to the high concentration of microorganisms in the river compared to groundwater
The results show that the k values decreased with increasing flowrate, suggesting that the flowrate controls the disinfection of pathogenic bacteria in river water
Summary
Kuranji River is a raw water source for the water treatment plant in Padang City, West Sumatra, Indonesia In this river people wash, bathe and defecate. Compared to using the addition of chlorine, fixed-bed filtration and floating media filter-microfiltration, induction plasma is a new technology for the removal of pathogenic bacteria from water. This technology achieves significantly enhanced disinfection of microorganisms and degradation of organic contaminants due to being environmentally friendly, making no demands on temperature and pressure, reaching higher removal efficiencies, and being unresponsive to pollutants. The aim of this study was to investigate the application of inductively coupled plasma to remove pathogenic bacteria from river water. Based on the experimental data, the removal efficiency and disinfection yield were evaluated
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