In the present work, the influence of the water matrix on the removal of antibiotic resistant bacteria during the electro-disinfection with diamond anodes was studied, paying special attention to the disinfection efficiency and the prevention of the formation of hazardous disinfection by-products. This will allow to evaluate if electrolysis is more suitable as pretreatment of the main pollution source or as tertiary treatment of urban wastewater. To do this, electrolysis of synthetic wastewater rich in ammonium (simulating the effluent of an oxidation pond) and hospital urine intensified with three different bacteria (E. faecalis, K. pneumoniae, and E. coli) were carried out. Results show that the disinfection efficiency is higher in the synthetic wastewater for all the bacteria tested, but chlorate is formed as disinfection by-product. Electrogenerated hypochlorite and chloramines are the main responsible species for bacteria depletion. Presence of organics (urea, creatinine and uric acid) as additional ammonia precursors in hospital urine leads to the well-known breakpoint reaction with electrogenerated active chlorine, yielding an increasing concentration of chloramines. This helps to prevent the formation of chlorate in hospital urine because hypochlorite is mainly wasted in the oxidation of organics and the formation of chloramines. These results are of a great significance because they indicate that antibiotic resistant bacteria can be efficiently removed in complex matrixes without the formation of hazardous chlorine by-products if it is carried out as a pretreatment before discharge to WWTP.

在目前的工作中，研究了水基质对金刚石阳极电消毒过程中抗药性细菌去除的影响，特别注意消毒效率和防止有害的消毒副产物的形成。这将有助于评估电解是否更适合作为主要污染源的预处理或城市废水的三次处理。为此，用三种不同的细菌（粪肠球菌，肺炎克雷伯氏菌和大肠杆菌）使富含氨的合成废水（模拟氧化池的废水）和医院尿液进行电解。）进行。结果表明，对于所有测试细菌，合成废水的消毒效率均较高，但形成了氯酸盐作为消毒副产物。电产生的次氯酸盐和氯胺是导致细菌耗竭的主要原因。医院尿液中存在有机物（尿素，肌酐和尿酸）作为额外的氨气前体会导致众所周知的与电生成的活性氯发生断点反应，从而增加氯胺的浓度。这有助于防止医院尿液中氯酸盐的形成，因为次氯酸盐主要浪费在有机物的氧化和氯胺的形成上。