Textile Wastewater Treatment by Using Moringa Seed as A Natural Coagulant
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Date
2015-06
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Addis Ababa University
Abstract
Currently, there are a number of textile factories which are operating in Ethiopia. Consequently, the
magnitude of textile wastewater generation rate of the county has been increased. However,
wastewater discharge practice in Ethiopia does not meet the national discharge standard. Because,
there is a trend of discharging untreated or little treated textile wastewater into environment [3].
Therefore, to limit the bad consequence of such trend on environment it is indispensable to apply the
most effective wastewater treatment system. In this connection, coagulation is one of the most
effective treatment methods to remove toxic pollutants of textile wastewaters that technically need
adding of either chemical or natural coagulant. However, use of chemical coagulants has been
criticized to have some limitations. Consequently, recently there is an interest to replace chemical coagulants by natural materials.
The objective of
this study was to evaluate the effectiveness of Moringa seed as a coagulant for the treatment of textile wastewat
er. This research followed quantitative approach and used primary data. Accordingly, experiments were carried
out using jar tests apparatus by varying some operating parameters such as dose
of coagulant, pH, and mixing time in order to study their effect as well as optimum condition on coagulation. The optimum conditions were at
6g/l of coagulant dose, pH 4 and 45 minutes of mixing time with rapid mixing 100 rpm for 2
minutes and slow mixing 40 rpm for 45 minute and 30 minutes of settling time. At these optimum conditions 94
% color reduction, 90 % turbidity reduction, 82.7 % TDS and 86.8 % TSS reduction were obtained.
Hence, it is recommended to use Moringa seed as coagulant since it is found effective for removal
of color, turbidity, TDS and TSS from textile industry wastewater. Keywords: coagulation, coagulant, textile wastewater, wastewater treatment Moringa seed, Moringa.
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Keywords
Coagulation, Coagulant, Textile wastewater, Wastewater treatment Moringa seed, Moringa