Research Outputs (Civil and Environmental Engineering)

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Information regarding content on this collection please contact : Salome Potgieter by email : salome.potgieter@wits.ac.za or Tel : 011 717 1961

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Browsing Research Outputs (Civil and Environmental Engineering) by Type "Postprint Article"

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    Waste to wealth: A case study of the ondo state integrated wastes recycling and treatment project, Nigeria.
    (EuroJournals, Inc., 2009) Olanrewaju, O.O.; Ilemobade, A.A.
    The Ondo State Integrated Waste Recycling and Treatment Project, came into existence in June 2006 with the commissioning of the project office complex along Igbatoro Road, Akure by the Nigeria President, Chief Olusegun Obasanjo. The Project started operation in December 2006 with the aim of minimising solid waste in Akure and its environs. Since its inception, OSIWRTP has recorded huge successes in transforming the waste generated in Ondo State to wealth by the development of various valuable products using the basic concepts of sustainability: social progression, technical and technological improvements, environmental protection and economic development. Such waste is been generated from agricultural waste, nylon and plastic waste and foundry (metal) waste. Several techniques have been used to transform the waste into profitable products e.g. using anaerobic digestion (biogas) to produce energy and fertilizer; composting for soil conditioner; scrap iron for foundry products and other recycling techniques for solid wastes. The main output of OSIWRTP as at today are fertiliser, foundry materials and other recycled materials depending on the availability of wastes, and according to demands and need.
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    Water use efficiency of Manihot Esculenta Crantz under drip irrigation system in South Western Nigeria.
    (EuroJournals, Inc., 2009) Olanrewaju, O.O.; Olufayo, A.A.; Oguntunde, P.G.; Ilemobade, A.A.
    Field experiments was conducted at Teaching and Research Farm, Federal University of Technology, Akure between November 2006 and November 2007 to find out the water use efficiency under drip irrigation system and effect on the growth and yield of Cassava (Manihot esculenta Crantz). A popular hybrid of cassava TMS 30572 was tried as a test crop. The soil of the experimental site was moderately drained, loamy sand. The experiments were laid out in a 4 × 4 × 2 randomised complete block design (RCBD) consisting of 4 treatments, 4 replicates and 2 varieties using a spacing of (1m × 0.8m) for mechanical harvesting. The results indicated that the highest moisture content was recorded at depth of 40cm during the late stage of tuber development and the highest biomass yield was recorded under full irrigation treatment than in other treatments. The yield of cassava ranged from 21.87 to 14.13 t ha-1 in all the treatments except for the control that has 8.45 t ha-1 while the water use efficiency ranged from 19.18 to 23.63 kg ha-1mm. Irrigation through full treatment registered the highest mean tuber yield of 21.87 t ha-1 while the least tuber yield was associated with the control treatment. The height and stem diameter of cassava also responded higher under full treatment of available water. This study demonstrated that medium irrigation (60% AW) could be best option in terms of water efficiency.