Evaluation of on-farm potato processing water usage and treatment

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Bosak Zurowsky, Vera Katerina

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University of Guelph


This research monitored water used by a potato storage facility for washing potatoes, and its susequent treatment in an adjacent treatment system over two years. Water conservation strategies initiated in the second year (Y2) decreased water consumption by 40%, compared to the first year (Y1). The raw water had concentrations of 1121 and 558 mg L-1 BOD5, 5234 and 3600 mg L-1 TSS, 222 and 136 mg L-1 TN, 23.4 and 42.6 mg L-1 TP in year Y1 and Y2, respectively. The system had high mass removals of all parameters, ranging from 71% to 99% in both years. Laboratory experiments studied sand filtration and coagulation for supplementary TSS removal. Unsaturated filters with lowest dosage were the best performing filter and polymer Ultrion 8185 was the best performing coagulant. Further research is necessary to aid the development and implementation of simple and inexpensive standardized treatment systems for on-farm wash-water treatment.



Potato wash-water, Water use, Coagulation, Wastewater treatment, Sand filtration