Use of calcium-based materials for phosphorus removal from greenhouse wastewater

dc.contributor.advisorZheng, Youbin
dc.contributor.advisorDixon, Mike
dc.contributor.authorDunets, Siobhan
dc.date.accessioned2014-09-10T19:14:35Z
dc.date.available2014-09-10T19:14:35Z
dc.date.copyright2014-09
dc.date.created2014-09-08
dc.date.issued2014-09-10
dc.degree.departmentSchool of Environmental Sciencesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeEnvironmental Sciencesen_US
dc.description.abstractPhosphorus (P) contamination in wastewater is a major topic of discussion in the North American greenhouse industry. This study evaluated chemical treatment methods including precipitation of P as calcium phosphate and P-sorbing material filters for removing high, variable P concentrations, and provided treatment recommendations specific to greenhouse wastewater treatment. Precipitation via lime addition achieved 99% P removal at a lime : P ratio of 1.5 and a pH of 8.6-9.0. Efficiency of separation of the precipitate was improved via flocculation using guar gum or cationic starch. Material columns incorporating steel slag or concrete waste removed >99% over repeated applications, and demonstrated high phosphate retention. Both methods also removed some micronutrient contaminants, and recovered P and other nutrients in forms that could be re-used as a nutrient source for plants. Overall, this research demonstrated that these treatment methods are worthy of further research on application to a full-sized system.en_US
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (Canada Graduate Scholarship- Master's Program)
dc.description.sponsorshipOntario Student Assistance Program (Ontario Graduate Scholarship)
dc.description.sponsorshipUniversity of Guelph
dc.identifier.urihttp://hdl.handle.net/10214/8439
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectphosphorusen_US
dc.subjectwastewater treatmenten_US
dc.subjectgreenhouse wastewateren_US
dc.subjectcalcium phosphateen_US
dc.subjecthorticultureen_US
dc.subjectprecipitationen_US
dc.subjectphosphateen_US
dc.titleUse of calcium-based materials for phosphorus removal from greenhouse wastewateren_US
dc.typeThesisen_US

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