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Author
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Panashe Rutsate
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Title
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An assessment of the brewery industry’s wastewater for non-potable industrial reuse: a case of Chitungwiza sorghum brewery, Delta
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Abstract
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A lot of water is needed in industries for production, therefore generating a lot of wastewater in the process. Industries looking for ways to conserve the resource can reuse their wastewater after proper treatment. The study assessed the physiochemical quality of wastewater from Delta Beverages sorghum plant in Chitungwiza to find out if it is suitable for non-potable industrial reuse. Some of the non-potable processes at the Chitungwiza plant include cleaning, cooling, gardening, steam production, vehicle washing and others. The selected physiochemical water parameters analysed were chemical oxygen demand, permanganate value, biological oxygen demand, total settable solids, nitrogen, phosphorus, total dissolved solids, electrical conductivity, pH and temperature. The study first evaluated the volume of treated wastewater to see if it is sufficient for use in the plant’s non-potable processes. The average weekly volume of treated wastewater at the plant was 46673.67hectolitres and this amount proved to be sufficient for reuse. To perform the required statistic calculations, a software named SPSS version 31 was used for conducting one-sample t-tests and paired sample t-tests. The physiochemical parameters of treated and untreated wastewater were compared using a paired sample t-test and showed that the treatment process at the plant is effective in removing contaminants. The one sample t-test indicated that chemical oxygen demand, biological oxygen demand and total nitrogen of treated wastewater were not in range with the World Health Organization (WHO) standards, showing a p value of less than 0.005. The physiochemical parameters of the treated wastewater that were within the standard ranges showing a p-value of greater than 0.05 were total settleable solids, electrical conductivity, total dissolved solids, permanganate value, phosphorus, temperature and pH. The findings from the study indicated that wastewater from Delta Beverages could be reused in the plant’s non-potable processes.
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Date
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June 2023
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Publisher
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BUSE
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Keywords
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Wastewater
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Physiochemical parameters
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Reuse
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Supervisor
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Dr L. Mabhungu
Rutsate - SHEM.pdf