Fertilizing Potential of Brewery Wastewater Sludge for Cultivation of Lettuce and Tomato on Planosol and Vertisol Soils
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2019-02-02
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Addis Ababa University
Abstract
Title: Fertilizing Potential of Brewery Wastewater Sludge for Cultivation of Lettuce and Tomato on Planosol and Vertisol Soils
Name: Alemnesh Bejiga
Year May 2018
Alcohol and beverage factories produce large volume of wastewater sludge, which when applied to soil could have a fertilizing potential. However, before the sludge is used as soil amendment, the chemical property of the sludge need to examined. In Ethiopia brewery companies are growing rapidly producing large volume of wastewater sludge which can be used as fertilizer with proper technologies.The objective of this study was to determine the effect of brewery wastewater sludge on soil properties andgrowth and yield of vegetables. In this study two soil types are used, Planosol and Vertisol soils, and two vegetables, lettuce and tomato, as experimental plants. The experimental set-up was completed randomized design. Brewery wastewater sludge was prepared at 10, 20, 30 and 40%for addition as soil amendment. Two controls were used in the experimental treatment:no treatment control and inorganic fertilizer treatment. Our result indicate that the concentration of heavy metals of brewery wastewater sludge was within acceptable range of World Health Organization. And theaddition of wastewater sludgeincreases theamount of total Nitrogen, available potassium and organic carbon in the soil.WhileAvailable phosphorous decreased. The highest growth parameters were obtained in Vertisol soil amended with brewery wastewater sludge at 30% treatment rate for tomato and 20% of the sludge for lettuce. From this study we concluded Brewery wastewater sludge has fertilizing potential and it could be used as soil amendment for increasing productivity of vertisol soil.
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Keywords
Wastewater, Sludge, Inorganic Fertilize, Planosol Soil, Vertisol Soil, Lettuce, Tomato