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Development Of Household Defluoridation Unit Based On Crushed Burnt Clay Pot As Sorbent Medium: A Case Of Keren Community, Eritrea

Congress: 2015
Author(s): Beraki Mehari (Keren, Eritrea), Beraki Bahre Mehari, Alfred O. Mayabi, Beatrice K. Kakoi
Hamelmalo Agricultural College1, Jomo Kenyatta University of Agriculture and Technology2

Keyword(s): Sub-theme 1: Water supply and demand,
AbstractFluoride in water in some parts of Eritrea is above the WHO guideline of 1.5 mg/L. One of the communities in Eritrea exposed to drinking water of high fluoride is Keren community and as a result, they suffer dental and skeletal fluorosis. A survey at 16 water sources in 13 villages was made and 87% of the samples exceeded the guideline, having fluoride levels 1.40-3.98 mg/L. Fluoride removal from synthetic water using crushed burnt clay pot as a sorbent medium was studied in a packed column. A preliminary experiment was carried out on a laboratory scale in mini column, with three different packed beds, 15, 20 and 25 cm depth. A flow rate of 2.5, 5, 10, and 15 ml/min having 5 mg/L fluoride was passed through each bed. The results indicated that the breakthrough volume and time increased with increasing bed depth of the column. On the other hand, an increase in flow rate reduced the treated volume at breakthrough and therefore decreased the service time. 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