Publication:
Impact of substrate type, depth and retention time on organic matter removal in vertical subsurface flow constructed wetland mesocosms for treating slaughterhouse wastewater

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dc.contributor.authorMburu, C.
dc.contributor.authorKipkemboi, J.
dc.contributor.authorKimwaga, R.
dc.date.accessioned2024-03-06T08:15:08Z
dc.date.available2024-03-06T08:15:08Z
dc.date.issued2019
dc.description.abstractPopulation growth and the associated demand for meat products is creating an increasing concern on water over slaughterhouse associated pollution of aquatic environments in Sub-Saharan Africa. In Kenya, increasing volumes of strong slaughterhouse wastewater being discharged either untreated or partially treated has necessitated ardent research into sustainable technologies. Vertical sub-surface flow constructed wetlands offer a promising solution. A study investigating the effect of depth, time and substrate variation on organic matter removal from slaughterhouse wastewater was conducted using vertical sub-surface flow constructed wetlands. Experimental out-door mesocosms designed as cylindrical metal tanks of variable depth and substrate were set up at Egerton University, Kenya. Results showed that organic matter removal was highest at 5 day retention time, with removals of about 50%, 55% and 82% for BOD5, COD and TSS respectively. Deeper (0.8 m depth) mesocosms were noted to have significant differences in treatment for TSS and NH4–N compared to shallow (0.65 m) mesocosms. Sand substrate was observed to perform better in BOD5 and TSS reduction compared to quarry dust and gravel. Increase in substrate size was observed to increase removal efficiency of NH4–N at longer retention time. However, effluent concentration of NH4–N fluctuated with removal efficiency averaging at 26.5%. The study demonstrated that vertical sub-surface flow constructed wetlands operated at a longer retention time of 5 days; with intermittent wastewater feeding, facilitated over 50% removal of organic matter in slaughterhouse wastewater.
dc.description.sponsorshipThe Austrian Development Agency (OeAD)
dc.identifier.citationC. Mburu, J. Kipkemboi, R. Kimwaga, Impact of substrate type, depth and retention time on organic matter removal in vertical subsurface flow constructed wetland mesocosms for treating slaughterhouse wastewater, Physics and Chemistry of the Earth, Parts A/B/C, Volume 114, 2019, 102792, ISSN 1474-7065, https://doi.org/10.1016/j.pce.2019.07.005.
dc.identifier.urihttps://doi.org/10.1016/j.pce.2019.07.005
dc.identifier.urihttps://repository.nrf.go.ke/handle/123456789/685
dc.language.isoen
dc.publisherElsevier
dc.subjectEgerton University
dc.titleImpact of substrate type, depth and retention time on organic matter removal in vertical subsurface flow constructed wetland mesocosms for treating slaughterhouse wastewater
dc.typeArticle
dspace.entity.typePublication

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