DI Malgwi’s scientific contributions

Solar still for the production of clean quality water fit for human consumption and other hygienic uses has been designed and developed. The design and operation, which is based on energy and environmental physics concept of rainwater-evaporation and condensation process, is simple, straightforward and has low maintenance cost. Twenty-four water samples were collected from various boreholes in Mubi, Adamawa State, Nigeria, in sterile bottles. Enumerations of aerobic bacteria by aerobic plate count and coli form by multiple-tube fermentation technique have been carried out. Results showed that heavily contaminated samples with an average microbial load of 2.57x10cfu/ml; a positive 100% distribution of coli form bacteria; and an input average of 266.7mg/l of CaCO were completely eliminated producing up to 9 litres of pure water, with an average pH value of 9.13 per day in temperate climate. The water does not acquire the \'flat\' taste of commercially distilled water since it is not boiled. This study is therefore an application of physics for the production of distilled water from contaminated water for both human health protection and environmental sustainability. Keywords :Solar still, portable water, health protection. Nigerian Journal of Physics Vol. 18 (2) 2006: pp. 203-210

The wind energy potential for Mubi in Adamawa State of Nigeria (latitude 10 ° 15 ' and longitude 13 ° 15 ') has been studied and evaluated so as to remedy the fluctuating electric power, particularly, in Mubi which receive an average of only about 2.15 MW instead of 4.35 MW from the Power Holdings Company of Nigeria. This electric power fluctuations and outages usually disrupt economic and social activities.The computed monthly average wind speed in Mubi, Adamawa State is 3.44ms -1 0.01% and the estimated power is 16.34Wm -2 0.1%. The result is good enough, since the minimum wind speed required to turn the turbine of a wind machine is 3.0ms -1 . Comparative analysis using the Wind Speed Scale at 10m heights shows that this value of wind speed can be categorized as moderate especially when compared with other towns in Nigeria. This implies that if wind energy is properly harnessed, it can be captured and converted into electricity by a wind machine, which will alleviate the problems of incessant power failure in the study area. Aside, wind energy is a renewable source of energy and it is environmentally friendly which conforms to the national energy and environmental policy of Nigeria with respect to the new world order of economic development and environmental sustainability. Keywords : wind energy potential, electric power fluctuation, wind speed Nigerian Journal of Physics Vol. 17, 2005: 40-45