Abstract Geopolymer concrete has been the ideal replacement for Ordinary Portland cement concrete in producing green concrete. The binder in geopolymer concrete is a cementitious paste made from amorphous Aluminosilicate and activated by an Alkaline solution. The geopolymerization process is initiated at elevated temperatures. Thus, the curing requires elevated temperatures. This curing method limits the application of geopolymer concrete in the construction industry. In a geopolymer mix, th...
Abstract rtificial neural network (ANN) modelling has been applied successfully in hydrology to predict future flows based on previous rainfall-runoff values. For a long time, flooding has been experienced in the surrounding areas of the Rift Valley lakes including Lake Baringo, fed by the River Perkerra, due to the rising water levels because of the above-normal rainfall season, resulting in massive socioeconomic losses. The study aims at predicting the occurrence of floods in River Perkerr...
Abstract In recent years concerns over dwindling reserves of ground water and overloaded or costly sewage treatment plants has generated much interest in the reuse or recycling of greywater. Re-use of greywater offers several advantages including a reduction in the demand on potable water supplies. Despite the prevalent direct reuse of greywater, especially in water scarce areas, its quality is not well documented. This study determined the physico-chemical and microbial quality of greywater...
Abstract/Overview Energy availability at domestic level is a challenge across the world and especially in Africa. Firewood is the major source of energy for cooking for households in Kenya and there is need for a friendly sustainable environmental fuel. Carbonized biomass materials (briquettes) are considered a substitute. This study thus evaluated effect of selected briquetting techniques on briquettes’ performance properties. Milled charcoal dusts mixed in a ratio of 1:1:1 (Rice husk,...
Wastewater sludge has garnered global interest since its generation in terms of source, volume, quality, treatment, disposal, or reuse. It has an impact on human life and other natural resources, most notably fragile ecosystems. The study was carried out at the Savannah Research Institute (SARI) in the Tolon District of the Northern Region of Ghana. The main objective was to design, construct and test the performance of a filter for the treatment of wastewater sludge for irrigation. The filte...
Animal proteins are becoming largely expensive, hence the daily protein needs of low-income earners are unmet. This has triggered the need to explore rich but less expensive protein sources of plant origin such as okara, a soy residue to meet the protein needs of the consumer. One effective way of ensuring that consumers benefit from these less-expensive protein sources is their incorporation into frequently consumed diets. Therefore, this study sought to assess the effect of pretreatments (n...
A producer and a buyer enter into a two-party contract when they practice contract farming. A buyer commits to purchasing output from a producer at a predetermined price, quality and timing (Bellemare & Bloem, 2018). In many nations around the globe, contract farming is used to link smallholders’ farmers to profitable markets for higher incomes and better living conditions (Barrett et al., 2012). Early in the nineteenth century, the North American agricultural sector saw the introduction of...
The study assessed the performance of irrigation schemes in the Transition Agro-ecological Zone of Ghana using a set of comparative performance indicators. The study was conducted on two (2) functioning schemes and two (2) defunct schemes. It was carried out in Akumadan, Tanoso, Kaniago and Subinja irrigation schemes in the Transition Agro-ecological zone of Ghana. The performance of the functioning schemes (Akumadan and Kaniago) spanning the years of 2018 – 2022 were evaluated using select...
Performance of a solar powered irrigation systems in the Northern Ghana was evaluated in this study. Solar powered water application systems (drip, spray tube and sprinkler irrigation systems) were evaluated using performance indicators. Coefficient of variation (CV), emission uniformity (EU), emitter flow variation (Qvar) and mean application rate (MAR) were evaluated for the drip irrigation system for different water levels in the tank. Uniformity Coefficient of (CU), Distribution Uniformit...
Groundwater resources have been heavily dependent on for domestic and agricultural purposes since the beginning of time. This study was therefore aimed to evaluate the significance of physical and environment factors on groundwater potential, delineate the groundwater potential zones and determine the water quality in the Wa Municipality of Ghana for irrigated agriculture. Nine (9) layers namely; Geology, lineament density, rainfall, drainage density, soil, landuse and landcover (LULC), topog...
Abstract Modern vertical axis wind turbine is a promising technology, appropriate for small scale applications in urban areas and isolates sites for different uses. Including pumping water, producing electrical power, passive starting others turbines and purposes. The Savonius wind turbine is a robust and reliable mechanical device, easy to build, produces less noise. The formation and growths of cracks in this system reduces its stiffness and yield strength, which lead to a poor performance ...
Abstract: This study was undertaken in Kitui South in Kitui County in the south eastern parts of Kenya. The main objective of the study was to develop a spatial model that can be used for selection of suitable sites for sand dam in Kitui South. Data analysis was done using three approaches. The first approach involved the use of the Remote Sensing (RS) technique where data was preprocessed and analyzed using Erdas Imagine software and Geographical Information Systems (GIS) for spatial modell...
Abstract: Biogas is an alternative source of energy that is produced by methanogenic bacteria through the bio-degradation of organic material under anaerobic fermentation of organic matter conditions. The aim of this study was to determine the optimal mix ratio for biogas production from anaerobic digestion of mango fruit peel and cow dung. The experiment was batch operated and daily gas yield from the mixture was monitored for 30 days. The parameters measured were total solids (TS), volatil...
Abstract: Ethanol produced by microbial fermentation of biomass is used primarily as a substitutive for gasoline. It is produced by using an eco-friendly method to replace fossil fuel. Therefore, this study was focused on co-fermentation of orange and papaya fruit peels waste for bioethanol production with the objective of evaluating its potential for ethanol production with different concentrations (100 g orange peel, 75 g orange peel +25 g papaya peel, 50 g orange peel +50 g papaya peel, 2...
Abstract: Biogas is eco-friendly alternative renewable energy source produced through anaerobic digestion of organic compounds. In this study, biogas production was evaluated from sawdust (SD)and cow dung (CD) co-digestion in five mix ratios under mesophilic conditions (35ºC) using batch digesters in the micro biology Laboratory of Haramaya University to evaluate biogas production potential of sawdust through anaerobic digestion alone or in combination with cow dung .In 100%SD , 100% CD, 50...