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UNESCO-IHE Institute for Water Education, Delft (2008)

Improvement of Bindura water treatment plant : a case study in Zimbabwe

Goza, O

Titre : Improvement of Bindura water treatment plant : a case study in Zimbabwe

Auteur : Goza, O

Etablissement de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2008

Résumé
Rapid urbanisation over the years has seen the population of Bindura Town in Zimbabwerising steadily. The urbanisation was caused by a number of factors. Firstly, rural urban migrations as people seek employment opportunities in town. Secondly, the opening up of several gold and nickel mines around Bindura resulted in many employees seeking for accommodation. Last but not least, there is the aspect of high birth rate in general. Unfortunately, as the town grew in population and the drinking water demand was increasing, no expansion measures were taken by the then responsible authority, Municipality of Bindura, on its sole existing conventional water treatment plant. The plant, whose administration was taken over by ZINWA in September 2007, was constructed in 1972 with a production capacity of 14,400 m3/d. This output is against an estimated supply requirement of 18,000 m3/d. To make up for the deficit, ZINWA is resorting to water rationing, much to the consumers inconvenience. It is known, however, that the Bindura drinking water treatment plant is not performing to its design capacity. There was no performance evaluation done on this plant, which is about 36 years old now. As the plant is still expected to continue functioning, it is profoundly advisable and necessary to study the performance of this aged plant. This MSc study deals with a performance evaluation of the water treatment plant. This evaluation covers some proposed measures, which can be implemented to improve the output from the plant. Since the plant is currently failing to fill the supply reservoirs, the main problem to be addressed is the inadequate water output from the plant. Main parts of the study are to include literature study at IHE, performance study at the treatment plant including data collection (flow and water quality measurements),processing analysis and finally the writing of the MSc thesis report. It is worthwhile to note that this study was carried out in the period November to January, which is the peak rainfall season for Zimbabwe. The study is therefore the worst case scenario for the plant, as it receives the poorest raw water quality as compared to any other time of the year. The study brings about some short term proposals (for 2008) and several long term proposals (for 2018), that can be implemented to increase the plants output.

Sujets  : water treatment plants ; performance evaluation ; water supply ; Zimbabwe

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Page publiée le 2 janvier 2017, mise à jour le 14 octobre 2018