Browsing by Author "Ogedengbe, O."

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    Study of Safe Separation Distances between Rural Wells and Neighbouring Soak-Away Systems
    (Faculty of Agriculture, University of Ife, 1981) Ogedengbe, O.
    It is becoming increasingly common for educated Nigerians to build houses in rural and semi-urban areas of the country. The plan of a typical modern house includes construction of a septic tank and soakaway for disposal of wastewaters. Very often, a well is dug on the same plot of land for supply of water in lieu of tap water supply. If the homeowner knew that the soak-away system could contaminate his well-water, he might be able to arrange the structures so as to put a safe distance between his well and his soak-away unit. The study reported in this paper shows that in a silty sand soil, the safe separation distance is about 14 meters.
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    Treating Rural Water without Introducing Harmful Substances
    (Faculty of Agriculture, University of Ife, 1980) Ogedengbe, O.
    The coliform count on the stream water studied was high. The water is a direct source of drinking water to some rural communities. A previous study established that about 100 ppm of chlorine in the form of chlorox was sufficient to bring: the coliform Most Probable Number (MPN) from about 11,000 per l00ml down to within allowable standard of one per l00ml of water sample. There is some concern that turbid water contains organic matter which when chlorinated could give rise to formation of chloroform and possibly other chlorine-based compounds of the trihalomethane family which conceivably could be carcinogenic. This prompted design and construction of a simple system of turbidity removal and chlorination. With this system the required chlorine dosage even went down to about -50 ppm.