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The process combines micropollutant and pathogen destructive removal with high\u2010efficiency phosphorus removal and recycling as a soil amendment, clean water recovery, and the potential for carbon\u2010negative operation with integrated biochar water treatment. A key process innovation is converting a continuously renewed iron oxide coated, moving bed sand filter into a \u201csacrificial iron\u201d d\u2010orbital catalyst bed after adding O<jats:sub>3<\/jats:sub> to the process stream. Results for the Fe\u2010CatOx\u2010RF pilot studies show &gt;95% removal efficiencies for almost all &gt;5\u00a0\u00d7\u2009LoQ detected micropollutants, with removal rates slightly increasing with biochar addition. Phosphorus removal for the pilot site with the most P\u2010impacted discharge was &gt;98% with serial reactive filters. The long\u2010term, full\u2010scale Fe\u2010CatOx\u2010RF optimization trials showed single reactive filter 90% TP removal and high\u2010efficiency micropollutant removals for most of the compounds detected, but slightly less than the pilot site studies. TP removal decreased to a mean of 86% during the 18\u00a0L\/s, 12\u2010month continuous operation stability trial, and micropollutant removals remained similar to the optimization trial for many detected compounds but less efficient overall. A &gt;4.4 log reduction of fecal coliforms and <jats:styled-content style=\"fixed-case\"><jats:italic>E. coli<\/jats:italic><\/jats:styled-content> in a field pilot sub\u2010study suggests the ability of this CatOx approach to address infectious disease concerns. Life cycle assessment modeling suggests that integrating biochar water treatment into the Fe\u2010CatOx\u2010RF process for P recovery as a soil amendment makes the overall process carbon\u2010negative at \u22121.21\u2009kg CO<jats:sub>2<\/jats:sub>e\/m<jats:sup>3<\/jats:sup>. Results indicate positive Fe\u2010CatOx\u2010RF process performance and technology readiness in full\u2010scale extended testing. Further work exploring operational variables is essential to establish site\u2010specific water quality limitations and responsive engineering approaches for process optimization.<\/jats:p><\/jats:sec><jats:sec><jats:title>Practitioners Points<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>Adding ozone to WRRF secondary influent flows into tertiary ferric\/ferrous salt dosed sand filtration amplifies a mature reactive filtration technology into a catalytic oxidation process for micropollutant removal and disinfection.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Expensive catalysts are not used.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Iron oxide compounds used to remove phosphorus and other pollutants act as sacrificial catalysts with ozone, and these rejected iron compounds can be returned upstream to aid in secondary process TP removal.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Biochar addition to the CatOx process improves CO<jats:sub>2<\/jats:sub>e sustainability and phosphorus removal\/recovery for long\u2010term soil and water health.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p>Short duration field pilot scale and 18\u2010month full\u2010scale operation at three WRRFs with good results demonstrate technology readiness.<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p><\/jats:sec>","DOI":"10.1002\/wer.10876","type":"journal-article","created":{"date-parts":[[2023,5,5]],"date-time":"2023-05-05T00:04:06Z","timestamp":1683245046000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Iron\u2013ozone catalytic oxidation reactive filtration of municipal wastewater at field pilot and full\u2010scale with high\u2010efficiency pollutant removal and potential negative CO<sub>2<\/sub>e with biochar"],"prefix":"10.1002","volume":"95","author":[{"given":"Martin C.","family":"Baker","sequence":"first","affiliation":[{"name":"Department of Soils and Water Systems University of Idaho  Moscow Idaho USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Declan","family":"McCarthy","sequence":"additional","affiliation":[{"name":"Evergreen Water Solutions, LTD  Hinckley UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lusine","family":"Taslakyan","sequence":"additional","affiliation":[{"name":"Department of Soils and Water Systems University of Idaho  Moscow Idaho USA"},{"name":"Water Resources Program University of Idaho  Moscow Idaho USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George","family":"Henchion","sequence":"additional","affiliation":[{"name":"Evergreen Water Solutions, LTD  Hinckley UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Mannion","sequence":"additional","affiliation":[{"name":"Evergreen Water Solutions, LTD  Hinckley UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel G.","family":"Strawn","sequence":"additional","affiliation":[{"name":"Department of Soils and Water Systems University of Idaho  Moscow Idaho USA"},{"name":"Water Resources Program University of Idaho  Moscow Idaho USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0053-1218","authenticated-orcid":false,"given":"Gregory","family":"M\u00f6ller","sequence":"additional","affiliation":[{"name":"Department of Soils and Water Systems University of Idaho  Moscow Idaho USA"},{"name":"Water Resources Program University of Idaho  Moscow Idaho USA"},{"name":"Department of Chemical and Biological Engineering University of Idaho  Moscow Idaho USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,5,19]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.3390\/w15010043"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.scitotenv.2019.07.378"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.2147\/idr.S173867"},{"key":"e_1_2_7_5_1","unstructured":"Bakac A. &Pestovsky O.(2009).\u2009Iron catalysis in oxidation by ozone.United States Patent and Trademark Office. 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