Tiger Worm Based Toilets for Uganda GovernmentAided Schools: A Case Study of Boro Primary School Nwoya District


Authors : Jacob Nyende and Achire Michael West.

Volume/Issue : Volume 3 - 2018, Issue 8 - August

Google Scholar : https://goo.gl/DF9R4u

Scribd : https://goo.gl/HVY8Mz

Thomson Reuters ResearcherID : https://goo.gl/3bkzwv

Only 47% of the districts in Uganda have been able to meet the national target of 77% latrine coverage, whereas the average pupil to stance ratio in majority of primary schools in the country is reported to be 70:1, which leads to high fill up rates of pit latrines. Boro Primary School, Nwoya District was chosen as such a school with pit latrines that fill up in less than two years, resulting in high costs for demolition and construction of new latrine structures and open defecation in areas surrounding the latrines.Visits were made to the school, in January 2017 and March 2017 that had focus group discussions, key informant interviews and co – creation workshops in order to assess the sanitation situation with regard to excreta disposal in the school and to ensure involvement of these stakeholders. The use of tiger worms for the decomposition of faucal sludge in the latrines was studied as possible solution to the problem. Laboratory experiments were carried out to determine the tiger worm stocking density. The vermicompost produced was tested to assess its potential for use in agriculture. Results from Microsoft Excel Software Package (2016) showed a worm stocking density of 1.5kg/m2that gave the highest percentage reduction in the accumulation rates (0.46% per day) and the designed tiger worm based toilet had a pit volume 0.6045m3 and 1500g as the specified amount of tiger worms per pit. An operation and maintenance plan for the toilet was formulated to ensure sustainability of the latrine.

Keywords : Tiger-worms, vermicompost, primary schools’ toilets, parameter characterization, Boro-Nwoya, Uganda.

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