RAIN: Set-up of the gravity-driven filtration-irrigation system in Accra
Assembling of components. © Ronja Voß
In the last few days, the team of the RUB prepared the grounds for the pilot plant, drilled holes for the tank feedthroughs, connected the different units of the filter system and prepared filter bed media for the two filter stages. Gravel of assorted sizes was used as a support layer, followed by biochar as the main filter media. Biochar is a natural product that can be obtained from locally available organic residues such as maize spindles, coconut shells or rice husks. The biochar tested in this pilot plant was produced from maize spindles using a TLDU-gasifier. Out of the three different biochar types tested in column experiments in the laboratory, biochar from maize spindles has shown the best removal efficiency.
Preparing the filter units. © Sophie Krüger
After some long days under the Ghanaian sun the team of the RUB and the UG finished setting up the low-tech filter system. In the coming weeks, the pilot system will be operated and tested for the elimination performance of selected parameters such as the indicator organism Escherichia coli.
The gravity filter irrigation plant © RAIN
Sophie Krüger, M.Sc. +49 (0) 234 32 - 27056 / email@example.com
Prof. Dr.-Ing. habil. Marc Wichern +49 (0) 234 32 – 275891 / firstname.lastname@example.org
Dr.-Ing. Manfred Lübken +49 (0) 234 32 – 23114 / email@example.com