Alemtsehay, Gebremeskel (PhD)Sokate, Aylate2020-03-052023-11-282020-03-052023-11-282018http://etd.aau.edu.et/handle/12345678/20880Water supply and environmental engineering primary concern should be making potable water available to the community at large. Among the many topics addressed in the discipline, water purification method is of paramount issue to be addressed. Water purification can be undertaken in more sophisticated method and traditional way. An indigenous method used by Konso community to purify water using African spear plant was investigated in this research. Lab scale study was conducted to assess the efficacy of African spear plant to purify water in terms of water quality parameters such as PH, Turbidity and Bacteria presence. The study has used triangulation approach, means, qualitative and quantitative approach. The qualitative approach is used for the exploration of the method being used by the society by interviewing significant people in the community and observation of the practice in the society and to know the situation in which the community uses this traditional method. The quantitative method was used for measurement of African Spear plant efficacy in terms of water quality parameters such as PH, Turbidity and Bactria presence. The study found that, when the water is stirred with a crashed African Spear plant for about 1 minute and kept for about 10-15 minutes, African Spear plant has the capacity to reduce the turbidity of water, capacity to reduce the level of bacteria in the water and reduce the PH of the water but if it is kept for long time in the water, the African Spear plant makes the water media more favorable for bacteria and the color of the water is changed to the color of the plants. Wet African spear plant has much effect than dry plant in purifying water.en-USAfrican Spear PlantIndigenous Water PurificationEfficacyKonso CommunityThesis