Evaluation on sterile effect of water treatment equipment of compound electromagnetic field

Objective To explore the sterile effect and possible mechanism of the water treatment equipment of compound electromagnetic field(equipment for short).Methods Sterilization Test:The simulated water prepared with 8?099 of Escherichia coli(E.coli)were treated by the equipment for 60?s.During the treatment,the water samples were taken in 0,15,30,45 and 60?s and immediately incubated at 37°C and 44.5°C to determine the densities of E.coli.Continual Sterilization Test:Three kinds of water were made:(1)Tap water disposed with autoclave.(2)Dechloridized tap water treated by the sterile state of the equipment for 3?min.(3)Dechloridized tap water treated by the sterile state of the equipment for 3?min and colloidal precipitation state of the equipment for 20?min.8?099 of E.coli Were added in these three kinds of water and stayed there for 3?h.During the treatment,the water samples were taken in 0,0.5,1,2 and 3?h and incubated at 37°C and 44.5°C to determine the densities of E.coli.Results(1)The sterile ratio of the simulated water sample was 100% in 30?s by the equipment.(2)The sterile ratio of the water sample re-added bacteria was 100% in 60?min.Conclusion The equipment has rapid and effective sterile effect and some continual sterile effect.