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However, the process of disinfection, essential to the protection of human health, generates deleterious by\u2010products to both humans and the environment. This research aimed to evaluate the use of ozone as a disinfectant for wastewater treated by anaerobic\/aerobic baffled reactor for later agricultural reuse. Disinfection tests were conducted by applying ozone, in batch, with applied dosages of 5, 8, and 10\u00a0mg\u00a0O<jats:sub>3<\/jats:sub>\/L and contact time of 7\u00a0min. All the tests led to formaldehyde formation, therefore within the standard suggested by the World Health Organization. For the indicators total coliforms and <jats:italic>Escherichia coli<\/jats:italic>, the ozone was considered effective, satisfying the criteria for agricultural reuse according to the World Health Organization of a dosage of 8\u00a0mg\u00a0O<jats:sub>3<\/jats:sub>\/L.<\/jats:p><\/jats:sec><jats:sec><jats:title>Practitioner Points<\/jats:title><jats:p>\n<jats:list list-type=\"bullet\">\n\n<jats:list-item><jats:p>Proposal of decentralized system (anaerobic\/aerobic baffled reactor\u00a0+\u00a0ozone disinfection) for effluent treatment for agricultural reuse.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>Formation of formaldehyde dependent on applied ozone dose.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>Demand of ozone consumed preferentially for the formation of by\u2010products, with low removal of <jats:styled-content style=\"fixed-case\">COD<\/jats:styled-content>.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>High formaldehyde formation (high ozone demand) can impair the inactivation of pathogens.<\/jats:p><\/jats:list-item>\n\n<jats:list-item><jats:p>System promotes effluent that meets the standards established by the World Health Organization (<jats:styled-content style=\"fixed-case\">WHO<\/jats:styled-content>) for agricultural reuse.<\/jats:p><\/jats:list-item>\n<\/jats:list>\n<\/jats:p><\/jats:sec>","DOI":"10.1002\/wer.1128","type":"journal-article","created":{"date-parts":[[2019,4,20]],"date-time":"2019-04-20T12:59:15Z","timestamp":1555765155000},"page":"898-905","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Disinfection of anaerobic\/aerobic sanitary effluent using ozone: Formaldehyde formation"],"prefix":"10.1002","volume":"91","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1767-3298","authenticated-orcid":false,"given":"Nathalie Dyane Miranda","family":"Slompo","sequence":"first","affiliation":[{"name":"Department of Hydraulics and Sanitation University of S\u00e3o Paulo (EESC\u2010USP) S\u00e3o Carlos SP Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gustavo Henrique Ribeiro","family":"da Silva","sequence":"additional","affiliation":[{"name":"Department of Environmental and Civil Engineering University of S\u00e3o Paulo State (FEB\u2010UNESP) Bauru SP Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,5,12]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"crossref","unstructured":"Absi F. 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