The search for alternative energy sources is un avoidable for the fact that fossil fuels which remains the worlds energy sources are depleting at a faster rate and at the same time causing ecological and environmental problems. Biogas could therefore be an alternative that provides energy security and environmental sustainability. The success of any Biogas plant lies solemnly on the adopted design methodology and for this reason many failures were reported from Biogas plants due to poor design. In this book, a good design criteria is highlighted and effects of seeding and temperature being...

Travel Patterns of the Physically Disabled explored most of the daily activities of the physically disabled especially their travels. Their trips to work, schools, their trips for shoppings etc. the problems they face especially how they are unable to use to use transportation means ond modes like every other persons who are not physically disabled.This study of the travel patterns of the physically disabled was carried out in Jos. The group of the physically disabled used include the blind, the crippled and the lepers. A combination of questionnaire administration, focus group discussion...