Optimization of roughing filtration unit for a handwashing wastewater recirculation point-of-use system

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dc.contributor.authorOlupot, Peter Wilberforce
dc.contributor.authorMenya, Emmanuel
dc.contributor.authorJjagwe, Joseph
dc.contributor.authorWakatuntu, Joel
dc.contributor.authorRomán, Franz
dc.contributor.authorHensel, Oliver
dc.date.accessioned2023-08-11T10:17:25Z
dc.date.available2023-08-11T10:17:25Z
dc.date.issued2022-11-22
dc.description.abstractA downward roughing filter unit consisting of silica sand as the filter medium was optimized for performance towards removal of turbidity and suspended solids from handwashing wastewater. Design-Expert software was employed to optimize media particle size, filter depth, and flow rate. Linear and quadratic models were found to best fit the responses of turbidity and suspended solids removal, respectively. Particle size and flow rate were the only parameters with significant effects on the removal of turbidity and suspended solids. Optimal conditions were found to be media particle size 0.6 mm, filter depth 12 cm, and flow rate 0.3 Lmin 1 , corresponding to removal efficiencies of 62 and 67% for turbidity and total suspended solids (TSS), respectively, as predicted by the model. Validation of the model at optimal conditions resulted in turbidity and TSS removal of 55 and 53%, respectively. Additionally, removal efficiencies of the roughing filter towards apparent colour, true colour, biochemical oxygen demand (BOD5), and chemical oxygen demand (COD) from handwashing wastewater were 56, 20,32, and 5%,respectively. Overall, although the turbidity of filtered water was .50 NTU, the reduction achieved by roughing filtration is a significant step in enhancing the performance of water treatment processes downstream, including filtration and adsorption by slow sand filters and activated carbon, respectively.en_US
dc.description.sponsorshipVolkswagen Foundation, Grant 96659–1.en_US
dc.identifier.otherhttps://doi.org/10.2166/wst.2022.358
dc.identifier.urihttps://hdl.handle.net/20.500.14270/208
dc.language.isoenen_US
dc.publisherIWA PUBLISHING COMAPANYen_US
dc.relation.ispartofseries;Volume 86, Issue 10
dc.subjectfiltrationen_US
dc.subjecthandwashingen_US
dc.subjectrecyclingen_US
dc.subjectroughing filteren_US
dc.subjectwastewateren_US
dc.titleOptimization of roughing filtration unit for a handwashing wastewater recirculation point-of-use systemen_US
dc.typeArticleen_US

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