“You never know the importance of water, til the well runs dry.”
A cliché but an old and valid adage. Water is useful in many fields, however minuscule. Nonetheless, the water we use for our daily chores goes through a hectic process til it gets to our homes.
The Buffalo Nation, accompanied by our Mwekuume partners, Rotaract Clubs Of Bukoto & Rubaga were blessed to visit the National Water & Sewerage Corporation (NWSC) Water Treatment Plant in Gaba, and what a great deal there was to learn!
(Selfie by WCP Collins)
In case you missed out, a summarized article is here to expound your knowledge on the process.
Water from a natural source (L.Victoria in this case) enters the treatment plant and this is where purification starts. It commences with the addition coagulant chemicals, i.e Ferric Sulphate. This chemical causes the solid particles within the water to clump together and separate from the free flowing water.
After the raw water has been coagulated, it’s mixed mechanically by pedals in a process called flocculation. This causes any light particles remaining that didn’t coagulate to become heavy and dense so as to settle quickly.
The flocculated water then moves to settling basins called clarifiers. Here the dense particles formed as a result of flocculation and coagulation, settle and allow clarified water to be separated & forwarded further. The particles remain and form a sludge layer at the bottom which is removed periodically.
After clarified water leaves the basins, disinfection starts with the addition of Chlorine and then ammonia to form chloramine. The chloramine disinfected water passes through another set of basins to allow the disinfection to complete.
5. pH Correction.
At this stage. Lime is added to the water. The intention is to get to a targeted pH. This makes the water basic and less corrosive to the pipes in the distribution system.
This is generally the last step. Here, the water comes into contact with granular filter media (sand) to remove any suspended matter in the water.
Afterwards, purification is complete. The water is sent to different pumping stations, from where it is pumped to consumers. Quite a lot we learned. In addition, we appreciated the work of NWSC.
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