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本研究通过电化学消毒小试装置,系统考察了电极板材料、极板间距、p H、水温、Na Cl浓度等因素对水中大肠杆菌CGMCC 1.3373灭活效果的影响,并进一步考察了电化学消毒对抗生素抗性大肠杆菌CGMCC 1.1595的灭活效果及其抗性变化.结果发现,在相同的电化学消毒条件下,阳极采用钌铱涂层的钛电极板的灭活效果显著优于铅涂层和铱钽涂层电极板,并且极板间距为50 mm时灭活率最高.进一步研究表明,电化学消毒法对大肠杆菌的灭活率随水的p H升高而降低,随水温和Na Cl浓度升高而升高.在相同消毒条件下,电化学法对四环素抗性大肠杆菌的灭活率显著低于普通大肠杆菌.消毒后存活的抗性菌对四环素、青霉素、氯霉素的抗性,随消毒时间延长呈现先下降后上升的规律.
In this study, the effect of inactivation of E.coli CGMCC 1.3373 in water was systematically investigated by electrochemical sterilizing small-scale test equipment, such as electrode plate material, plate spacing, p H, water temperature and Na Cl concentration. The effects of electrochemical disinfection The inactivation effect and its resistance change of antibiotic-resistant Escherichia coli CGMCC 1.1595 were studied.It was found that the inactivation effect of the ruthenium-iridium-coated titanium electrode under the same electrochemical disinfection conditions was significantly better than that of the lead coating And iridium-tantalum coated electrode plates, and the highest inactivation rate was obtained when the distance between plates was 50 mm.Further studies showed that the inactivation rate of Escherichia coli decreased with the increase of water p H, and decreased with the increase of water temperature and Na Cl concentration increased and increased under the same disinfection conditions, the electrochemical method of tetracycline-resistant Escherichia coli inactivation rate was significantly lower than that of ordinary E. coli after disinfection survival of tetracycline, penicillin, chloramphenicol Resistance, with the disinfection time showed a downward trend first increased.