Abstract This Study Examined The Effects Of Effluent Discharges From Various Point-Loads On A Purposively Selected Receiving River, The Self-Recovery Ability Of The River And The Treatability Of Both The Discharges And The Receiving Stream In A Heavily Industrialized Community. The Work Involved Field Survey Of Industries Producing And Discharging Effluents In The Study Area (Ado Odo/ Otta Industrial Zone Of Ogun State, Nigeria); Determination Of The Effluents‘ Physico – Chemical, Biolog...
ABSTRACT Refractory bricks (refractories) are used in the construction of furnaces and kiln internal linings that hold, melt and transfer raw materials being processed. Kenya imports refractories mainly for its cement, metal smelting and sugar processing industries. Kaolin, bauxite, salama, soapstone and ball clays exhibited Loss of Ignition of 7-15%, silica of 46-55% and alumina of 25-34%. Soapstone and salama clays exhibited high values of potassium (5.6%) and iron oxide (16%), while salam...
Abstract The aim of this research was to develop an understanding of and measure the potential for sustainability in a South African urban water context. This was achieved through the use of a systems approach to develop and evaluate a composite index – the Sustainability Index for Integrated Urban Water Management (SIUWM) – based on a vision of what sustainable urban water management means to decision makers at selected local authorities around the country. The vision was expanded into ...
Abstract Water is not only essential for maintaining life; it is a key component of sustainable social and economic development having links to, inter alia, health, “sense of place”, food production and industrial growth. Although progress has been made with regard to water supply, it is estimated that there are still 2.4 million people in South Africa without access to adequate water and sanitation services as defined by the United Nations (Statistics South Africa, 2008). It is possible...
ABSTRACT BIOLOGICAL SULPHATE REDUCTION USING PRIMARY SEWAGE SLUDGE AS ENERGY SOURCE IN AN UPFLOW ANAEROBIC SLUDGE BED REACTOR Since the economics of biological sulphate reduction (BSR) are driven by the economics of the organic carbon source, the BioSURE® process has been developed as a low-cost effective system where primary sewage sludge (PSS) is used as the energy source. This research investigates the use of PSS for BSR in an upflow anaerobic sludge bed (UASB) reactor in detail in ord...
ABSTRACT South Africa is possibly facing the biggest housing backlog in its history, and the backlog is growing annually. The ability and means to deliver must be improved, together with a compromise between the construction materials used and the occupants' preferences. This study seeks to examine the use of concrete block construction for the wall superstructure of low cost housing in terms of affordability and acceptability by the end-users. Three objectives of this research study, which ...
Abstract An anisotropic damage model is proposed for the constitutive description of microcracking processes in brittle rock under a general loading path. Experimental data and micromechanical models are reviewed to quantify the effect of microcracking on the material stiffness and the mechanisms of microcrack formation in brittle rocks under compression are discussed. The sliding crack concept is adopted as the micromechanical basis of the anisotropic damage model. Undamaged material is rep...
ABSTRACT MATHEMATICAL SIMULATION OF DYNAMIC BEHAVIOUR OF SECONDARY SETTLING TANKS The main objective of this thesis was to briiig the theoretical and practical aspects of secondary settling tank developments closer together. This was achieved firstly, by evaluating and developing empirical relationships from which the flux theory constants may be derived from simpler sludge settleability measures; and secondly, by developing a computer model for the simulation of dynamic behaviour of full sca...
ABSTRACT Engineering structures subjected to dynamic loading exhibit vibration motions. These vibrations induce accelerations on the structures and their component parts. The accelerations in turn generate inertia forces that propagate the vibrations and significantly affect the response of the structures and their components parts to external loading. This cyclic cause and effect situation result in randomly oriented and time-dependent displacements as the basic response criteria of s...
ABSTRACT The major source of water in EMENE, the study area is rain, streams and well water. Waste management has been a problem in Nigeria and so many developing nations. Most organic pollutant and pollute our underground waters. In this research, three wells were reported polluted in the compound of Adedoyin school of preliminary studies, this research was carried out to know if pollution was as a result of a dump site found inside the compound. Well B was more closer to the dump site, fol...
ABSTRACT Construction industry has complexity in it nature because it contains large number of parties such as clients, consultants and contractors. The factors that influence construction management practice differ from country to country, due to prevailing conditions. The objective of this project is to identify factors that influence construction management practice in Nigeria construction industry and elicit perceptions/ranking of the severity using relative importance index of the vario...
ABSTRACT In the recent time, the use of low cost biosorbents like bacteria, fungi, algae and some agricultural by-products have been investigated for their biosorption capacities. In this work, the biosorptions of three heavy metals (zinc, copper and manganese) from aqueous wastewater solution by five micro-organisms (Bacillus circulans, Pseudomonas aeruginosa, Staphylococcus xylosus, Streptomyces rimosus and Saccharomyces sp.(Yeast) were investigated using a combined flow and batch process...
ABSTRACT The assumed deflection shapes used in the approximate methods such asin the Rayleigh–Ritz method were normally formulated by inspection andsometimes by trial and error, until recently, when a systematic method ofconstructing such a function in the form of characteristic orthogonal polynomials(COPs) was developed in 1985. However, vibrational analyses of plates with all edges free or clamped are much more complicated. This project aims at establishing particular expressions for the...
Abstract In Nigeria, stress challenges are usually prevalent mostly in construction industry. The construction industry is a competitive and challenging industry. Therefore, most of the construction professionals suffer from stress. This study aims to explore the relationship between stressors, stress levels, performance, and coping behaviors among construction professionals. These professionals include project managers, architects, field and office engineers, designers, and other profe...
Abstract Bioremediation has been proven to be the most effective method of cleaning up oil contaminated soils through the application of nutrients and microorganism to contaminated soils. Hence, this research was aimed at investigating the effects of particle sizes on bioremediation of crude oil polluted sandy soils. Six different soil samples were sieved using the B.S sieve sizes. The sieve sizes were classified into X and Y such that X is fine to coarse sand while Y is very fine to coarse ...