Papers by Author: T. Omotoso

Abstract: Pilot scale “Waste Stabilization pond” was evaluated for treating high quality waste water using aerobic process. The method involved the measure of the molecular oxygen utilized during a specified incubation period for the biochemical degradation of organic matter and oxygen used to oxidize inorganic material. Operation of the pond involved engineering construction to reduce the risk of soil and groundwater contamination. Calibration of the model using laboratory tests showed BOD for 5, 10 and 15 days as 101.9mg/l. 273.3mg/l and 426mg/l respectively. Pond efficiency was 76.19%. The design experience and post design results provided knowledge about the efficiency of a waste stabilization pond and the basis of recommendation and practice in developed cities.

Abstract: The water cycle is an obvious mode of transmission of enteric diseases. Bacteriologically polluted water is potentially dangerous to health because of possible outbreak of typhoid, dysentery and cholera epidemics. In this paper major sources of drinking water in Ado Ekiti and its environs were examined for physical, chemical and biological qualities. These consists of wells in Adebayo, Ajilosun, Odo-Ado and other suburbs; most popular sachet waters (pure water) produce in Ado- Ekiti and the Pipe-borne water from the state water cooperation (Ureje treatment plants). The results were analyzed using t-distribution method of data analysis and World Health Organization (WHO) Standard was applied. The wells were found to be a little more acidic. All the samples showed high calcium content and some gave total hardness value above WHO standard. 70% of the samples, failed bacteriological test. Samples examined give a wider coverage of drinking water sources in Ado-Ekiti, Ekiti State.

Abstract: Energy supply and utilization is one of the economic indices of regional development and standard of living. Energy availability in the rural areas of Nigeria is fast becoming a great challenge with the high cost of cooking gas and kerosene and environmental problems associated with firewood. The paper demonstrated the use of a pilot model study (floating drum plant) of bio-decomposition of animal waste (cattle dung and fodder) in an anaerobic condition (single batch system) to generate methane for domestic cooking. This is a unique way of waste management with additional values of energy accessibility, reliability, quality, cost and benefits including environmental and social aspects. Method involved the pre-treatment of the substrate and its inoculation. Material compositions were batched by weight. Gas produced was monitored for 10 times at 3 days interval effective from the fifth day of retention. Efficiency increased to peak at the 11th day (32.8% of the total cumulative, TC) and reduced to 1.2% TC at the 22nd day.