Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Afrique du Sud → 2021 → Assessment of the efficiency of water treatment plants in Vhembe District, South Africa

North-West University (2021)

Assessment of the efficiency of water treatment plants in Vhembe District, South Africa

Masindi, Fhatuwani

Titre : Assessment of the efficiency of water treatment plants in Vhembe District, South Africa

Auteur : Masindi, Fhatuwani

Université de soutenance : North-West University

Grade : Master of Science in Environmental Sciences 2021

Résumé partiel
Various studies have indicated that most rural and small-scale water treatment plants in South Africa face diverse operational challenges. Consequently, the majority of the plants are unable to meet the goal of delivering a reliable supply of safe drinking water. This study aimed to assess the efficiency of two small water treatment plants in the Vhembe District Municipality, in the Limpopo province. Raw and treated water quality at the plants and at the selected villages supplied by each plant was evaluated based on secondary data provided by the Vhembe District Municipality. This data included results of physicochemical and bacteriological water analysis for seven months categorized into dry and wet seasons. A questionnaire survey was also used to assess the operational practices at the plants and the perceptions of consumers about the quality of the water delivered. The study found that the raw water used in both Vondo water treatment plant (VWTP) and Mutale water treatment plant (MWTP) was of poor quality in relation to turbidity, pH, fluoride, iron, manganese, electrical conductivity, total dissolved solids, and total coliform. On the other hand, the values of free chlorine, fluoride, and sulfate were higher in the treated water at the Vondo water treatment plant. A seasonal analysis of the quality of raw and treated water showed that the raw water quality was better in the wet season at the Vondo water treatment plant. However, in the Mutale water treatment plant, the raw water quality was better in the dry season. For the treated water, the wet season had better water quality in both plants. The results from both water treatment plants indicated that there was no statistically significant seasonal difference between the quality of water produced by the plant and transmitted to the villages as a whole in each season. The study also found no significant seasonal difference between the quality of water produced by the plant and transmitted to village taps. A comparison of the water quality parameters with the SANS 241, DWAF, and WHO water quality guidelines revealed that electrical conductivity, pH, fluoride, total dissolved solids, sulfate, E. coli, and total coliforms fell within the SANS 241, DWAF, and WHO drinking water quality limits during the wet and dry seasons for treated water at both plants and villages.

Présentation

Version intégrale (1,7 Mb)

Page publiée le 19 mai 2022