Effect of Moringa oleifera-alum Ratios on Surface Water Treatment in North East Nigeria

N.E. Nwaiwu ； A.A. Bello

《Research Journal of Applied Sciences, Engineering and Technology》 3卷6期 (2011/06) Pp. 505-512

並列摘要

The aim of this study is to find out the optimum combination for MO and alum using alum as a coagulant aid in household treatment of natural pond surface water for domestic use. The physico-chemical properties investigated for in the raw, settled and filtered water were Ph, Total Dissolved Solids (tds), turbidity, colour and total suspended solids (tss). The various coagulant combinations with which the raw water from the pond was treated include Moringa oleifera (MO) seed powder only (i.e., 100% MO), aluminium sulphate (alum) only (i.e., 100% alum), 20% alum and 80% Moringa oleifera seed powder, 40% alum and 60% Moringa oleifera seed powder, 50% alum and 50% Moringa oleifera seed powder; 60% alum and 40% Moringa oleifera seed powder; and 80% alum and 20% Moringa oleifera seed powder. Five of the seven used coagulant combinations gave acceptable turbidity reduction i.e., below 10NTU. When Moringa oleifera seed powder was used as the sole coagulant, a filter was needed to obtain an acceptable turbidity value of 7.8NTU but there was no need for pH adjustment or correction. Moringa oleifera seed powder can be used in treating household drinking water either as a sole coagulant or in combination with alum (using the alum) as a coagulant aid. The settling time for the MO seed powder is longer than that of the combined coagulants if the same results are to be obtained. The recommended ratio for the combined coagulant dose is 60% MO seed powder and 40% alum.

並列關鍵字

Alum ； coagulation ； household filter ； Moringa oleifera seed powder ； turbidity