dc.contributor.author | Arra, John | |
dc.contributor.author | Kennedy | |
dc.date.accessioned | 2017-06-02T09:33:38Z | |
dc.date.available | 2017-06-02T09:33:38Z | |
dc.date.issued | 2016-11 | |
dc.identifier.other | 363.7284096761 ARA | |
dc.identifier.other | 2013 – MPH –PT -014 | |
dc.identifier.uri | http://hdl.handle.net/123456789/1184 | |
dc.description | Full text. | en_US |
dc.description.abstract | Background to the study: Water treatment plant in Masaka is currently recycling untreated
spent filter backwash water through Nabajjuzi River and yet the plant does not have any
treatment facility to treat the filter backwash waste water. Studies in USA indicates that
recycling untreated filter backwash waste water will contaminate the corresponding incoming
raw water and this overwhelms the water treatment plant’s effectiveness and efficiency in
removal of pathogens and the final water may no longer be safe for public health
consumption.
Objective of the study: To assess the effect of recycling untreated spent filter backwash
water through Nabajjuzi River on the quality and safety of final water in Masaka.
Methodology: An experimental study design was used to determine the effect of recycling
untreated spent filter backwash water on the quality and safety of final water in Masaka. The
effects of recycling untreated spent filter backwash water was assess using univariate and
bi-variate analysis. All variables having p-value ≤0.05 at the bi-variate level using ANOVA
were taken as significant predictors.
Results: Returning untreated spent filter backwash water made the raw water at intake point
dirtier; colour increased by 68%, turbidity by 55% Iron by 51% and faecal coliform bacteria
by 94.6%. Statistical analysis indicated significant difference in raw water quality before and
after discharge of untreated spent filter backwash water. No bacterial was detected in all final
water samples analyzed however; colour and iron in final water failed a couple of times to
meet the National Standard for Potable water.
Conclusion and recommendations: Since colour and iron affects aesthetic property of water
and non toxic at concentrations detected in final water, it is safe to conclude that despite
recycling of Sent Filter Backwash Water, Masaka final water quality is safe for human
consumption.To improve the quality of corresponding raw water and improve treatment
efficiency to consistently produced clean and safe water, the filter waste water needs to be
treated by constructing a pre-settlement tank or by using a dewatering press before recycling.
1 | en_US |
dc.language.iso | en | en_US |
dc.publisher | International Health Sciences University. | en_US |
dc.subject | Recycling -- Untreated backwash water -- Uganda | en_US |
dc.title | The effect of recycling untreated filter bachwash water through Nabajjuzi river on the quality of final water in Masaka District. | en_US |
dc.type | Thesis | en_US |