{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T03:45:04Z","timestamp":1787024704658,"version":"build-2736575974"},"reference-count":0,"publisher":"IWA Publishing","issue":"5","content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2008,4,1]]},"abstract":"<jats:p>In this paper, struvite (MgNH4PO4\u00b76H2O) precipitation kinetics were studied with different operating conditions (varying supersaturation, pH, Mg:P ratio, degree of mixing and seeding conditions) and relevant rate constants were determined by fitting a slightly modified first-order kinetic model to the experimental data obtained. The rate of change of ortho-P concentration in the bulk solutions increases with increasing supersaturation ratio. The estimated rate constants are 2.034, 1.716 and 0.690\u2009hr\u22121 for the supersaturation ratio of 9.64, 4.83, and 2.44, respectively. Kinetic parameters were also evaluated for the Mg:P ratio between the ranges of 1.0 and 1.6, indicating higher phosphorus removal efficiency with increasing Mg:P ratio. The rate constants were found to be 0.942, 2.034 and 2.712\u2009hr\u22121 for Mg:P ratios of 1.0, 1.3 and 1.6, respectively. The experimental observations for kinetic study of struvite precipitation with different stirrer speeds clearly show that the mixing intensity used had little effect on the intrinsic rate constants. K values found to be 2.034 and 1.902\u2009h\u22121 for 100 and 70\u2009rpm, respectively. Seeding, with 250\u2013500\u2009\u03bcm of seed crystals during the struvite precipitation kinetics test, was found to have very little effect on the ortho-P removal.<\/jats:p>","DOI":"10.2166\/wst.2008.022","type":"journal-article","created":{"date-parts":[[2008,4,11]],"date-time":"2008-04-11T11:52:39Z","timestamp":1207914759000},"page":"647-654","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":100,"title":["Effects of various process parameters on struvite precipitation kinetics and subsequent determination of rate constants"],"prefix":"10.2166","volume":"57","author":[{"given":"M. S.","family":"Rahaman","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Environmental Engineering Group, University of British Columbia (UBC), Vancouver, BC, Canada E-mail: mrahaman@interchange.ubc.ca; dsm@civil.ubc.ca"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Ellis","sequence":"first","affiliation":[{"name":"Department of Chemical & Biological Engineering, Fluidization Research Centre, University of British Columbia (UBC), Vancouver, BC, Canada E-mail: nellis@chml.ubc.ca"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. S.","family":"Mavinic","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Environmental Engineering Group, University of British Columbia (UBC), Vancouver, BC, Canada E-mail: mrahaman@interchange.ubc.ca; dsm@civil.ubc.ca"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"945","container-title":["Water Science and Technology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/57\/5\/647\/438758\/647.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/57\/5\/647\/438758\/647.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,3,27]],"date-time":"2020-03-27T17:22:19Z","timestamp":1585329739000},"score":1,"resource":{"primary":{"URL":"https:\/\/iwaponline.com\/wst\/article\/57\/5\/647\/14058\/Effects-of-various-process-parameters-on-struvite"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,4,1]]},"references-count":0,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2008,4,1]]}},"URL":"https:\/\/doi.org\/10.2166\/wst.2008.022","relation":{},"ISSN":["0273-1223","1996-9732"],"issn-type":[{"value":"0273-1223","type":"print"},{"value":"1996-9732","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2008,4,1]]},"published":{"date-parts":[[2008,4,1]]}}}