Browsing by Author "Mgudlwa, Tshawekazi Sinako"

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    Economic analysis of the Shear Separation Floatation (SSF) technology for winery wastewater treatment
    (University of the Western Cape, 2024) Mgudlwa, Tshawekazi Sinako
    Difficulties in the treatment of industrial wastewater have become serious challenges in the water and sanitation sectors. The wine industry is among the industries that are seriously affected by the difficulties of effluent treatment to comply with environmental standards. One of the effective methods to control the winery effluent is to install a customised wastewater treatment plant or upgrade an existing plant for better results. Economic analysis is necessary to evaluate the viability of installing the plant as the method for the treatment of wastewater. This dissertation is centered on an economic analysis of a wastewater treatment plant proposed as a solution to improve the wastewater treatment challenges at Winery X by means of a case study. The case study is based on a Shear Separation Flotation (SSF) pilot plant installed at Winery X. The key arguments in study are built on the conventional Cost-benefits analysis (CBA) as the main method of enquiry. The analysis includes Option 1- keeping the existing system and make no change, Option 2- upgrading the existing system with a flotation device which will recover the treated wastewater quality, and Option 3- upgrading the existing system with a flotation device and a Reverse Osmosis unit. Option 3 is expected to recover the treated wastewater quality and reduce the reliance on freshwater intake by at least 50%. Applying all the input variables, the primary economic analysis was conducted. Then, the sensitivity of the results to the varying values of the key input variables was examined. The initial results for the primary economic measures suggest that Options 1 and 2 are not viable while option 3 is viable. However, the sensitivity analysis suggests that option 2 would be viable after 10 years, provided fines are levied for non-compliance while option 3 would be viable and be profitable in 5 years. Therefore, option 3 is the most practical and preferred solution.
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    Factors associated with teenage pregnancies and childbearing among girls currently attending high school in South Africa.
    (University of the Western Cape, 2017) Mgudlwa, Tshawekazi Sinako; Susuman, Sathiya A.
    Teenage pregnancy and childbearing in South Africa are very common and persistent issues. Despite the different types of birth control methods that the government of South Africa has provided to the public, teenage pregnancy and childbearing at schools seems to be still a great challenge. This persistent problem implies that the children get sexually active at young ages. The purpose of this study is to investigate and analyse the factors associated with pregnancy and childbearing among teenage girls currently attending high school in South Africa. Secondary data drawn from the General Household Surveys (2011-2014) and 10% sample data from the 2011 South African census were used. Bivariate, and Multivariate analyses were carried in order to meet the aims of the study. The study analysed the prevalence, trends, and determinants of self-reported pregnancy as well as the extent of childbearing among teenage girls currently attending high school using data from the General Household Surveys (GHS) for the years beginning in 2011 to 2014 as well as Population Census 2011. The study is based on the assumption that there were no significant changes in the prevalence of self reported pregnancies and in childbearing among teenage girls currently attending high school in the different periods under study.