title: Treatment of potato farm wastewater with sand filtration.
abstract: This study examined sand filtration as a component of a potato farm wastewater treatment system. Two different sand filter designs, saturated flow and unsaturated flow, were evaluated at three different loading rates: 34, 68, and 136 L m(-2) d(-1). Filter design had a significant effect, with unsaturated flow sand filters having significantly (p < .05) better total suspended solids (TSS) removal (89%) than saturated flow sand filters did (79%). Loading rate also had a significant (p < .05) effect, given that the lowest loading rate had higher mass removal for TSS than the higher loading rates did. Overall, all sand filters removed TSS, 5-d biochemical oxygen demand, and total phosphorus well (62-99%). Total nitrogen removal was twice as high in unsaturated flow filters (53%) than in saturated flow filters (27%), because of the recurring cycle of aerobic and anaerobic conditions during sand saturation and drying in unsaturated flow sand filters.
authors.affiliation: a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , ON , Canada.|b School of Environmental Sciences , University of Guelph , Guelph , ON , N1G 2W1 , Canada.
authors.forename: V K
authors.initials: VK
authors.lastname: Bosak
authors.affiliation: a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , ON , Canada.
authors.forename: A C
authors.initials: AC
authors.lastname: VanderZaag
authors.affiliation: c Ontario Rural Wastewater Centre , University of Guelph , Alfred , ON , Canada.
authors.forename: A
authors.initials: A
authors.lastname: Crolla
authors.affiliation: c Ontario Rural Wastewater Centre , University of Guelph , Alfred , ON , Canada.
authors.forename: C
authors.initials: C
authors.lastname: Kinsley
authors.affiliation: a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , ON , Canada.
authors.forename: D
authors.initials: D
authors.lastname: Chabot
authors.affiliation: a Ottawa Research and Development Centre , Agriculture and Agri-Food Canada , Ottawa , ON , Canada.
authors.forename: S S
authors.initials: SS
authors.lastname: Miller
authors.affiliation: b School of Environmental Sciences , University of Guelph , Guelph , ON , N1G 2W1 , Canada.
authors.forename: R J
authors.initials: RJ
authors.lastname: Gordon
mesh_terms: D000383:Agriculture / Q000379:methods; D000072480:Farms; D005374:Filtration; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012822:Silicon Dioxide; D011198:Solanum tuberosum; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis; D014877:Water Pollution, Chemical / Q000517:prevention & control
chemical_list: D009584:Nitrogen; D010758:Phosphorus; D012822:Silicon Dioxide; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Wastewater treatment; potato wastewater; sand filtration; total suspended solids; vegetable wastewater