Removal of Organic Matter and Nutrients from Grey Water Using Activated Carbon of Corn Cob as An Adsorbent in SPA Service Enterprise (Filwoha) Addis Ababa, Ethiopia
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Date
2018-11
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Addis Ababa University
Abstract
Grey water is one kind of wastewater that is characterized by medium contents of BOD, COD,
Tot-N, Tot-P, suspended solids and dissolved solids. It is discharged to the environment without
any treatment and significantly affects the environmental media such as soil and water. It also
damage microorganism and aquatic life. Therefore, the objective of this study was to reduce the
pollutant load of organic and nutrient contents from the grey water to an acceptable level by
treating the wastewater using activated carbon of corn cob as an adsorbent. In this study, the
effects of adsorbent particle size, adsorbent dosage, pH, adsorption time and agitated speed on
the pollutant reduction were investigated in batch experiments. The influent results revealed that
the COD, BOD, Tot-N, Tot-P, Turbidity and Conductivity of the grey water were concentration of
1500 mg/L, 152 mg/L, 9.73 mg/L, 15.5 mg/L, 6.64 ms/cm and 200 NTU respectively. On the other
hand, the effluent results on the optimum values (pH; 6.5, activated carbon dosage; 0.35 g, time;
60 minutes) showed that the pollutant loads of grey water were reduced to 89 mg/l, 3 mg/l, 0.25
mg/l, 0.4 mg/l, 4.01 NTU and 2.24 ms/cm respectively. Consequently, the experimental results
indicated that the agricultural waste corn cob has a potential to be used as an activated carbon
for treatment of grey water which is safe and environmentally friendly.
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Keywords
Grey water COD, BOD, Tot-N, Tot-P, conductivity and Turbidity containing SPA Service Enterprise Filwoha, corn cob, activated carbon