本研究的目的是调查臭氧/游离氯和臭氧/一氯胺序贯消毒方案的协同作用。之前曾报道过臭氧/游离氯消毒方案；因此，本文的重点是臭氧/一氯胺序贯消毒方案。在本研究中，一氯胺是以约6.4 mg/L的过量氨氮形成的；因此，还研究了臭氧预处理后氨的影响。卵囊存活率通过改良的体外脱囊法测定，该方法与动物感染性数据一致。包括15个参考文献、图表。

The objective of this study was to investigate the synergy involved in ozone/free chlorine and ozone/monochloramine sequential disinfection schemes. The ozone/free chlorine disinfection scheme was reported previously; thus, the main focus of this paper is the ozone/monochloramine sequential disinfection scheme. In this study, monochloramine was formed with approximately 6.4 mg/L as N excess ammonia; thus, the effect of ammonia after pretreatment with ozone was also investigated. Oocyst viability was determined by a modified in-vitro excystation method that is consistent with animal infectivity data. Includes 15 references, figures.