Abstract: The unsustainability of conventional energy resources and their associated environmental pollutions made renewable energy the prime need of present time. Therefore, the research was conducted to investigate the production of biogas from Striga hermonthica co-digested with cow manure through anaerobic digestion with five treatment mix ratios were evaluated under mesophilic conditions (38ºC) using batch digesters in the Botanical laboratory of Haramaya University for 30 days of ferm...
Abstract: Production of biogas through anaerobic digestion of organic waste materials provides an alternative eco-friendly renewable energy source. With the aim of biogas production from codigestion of Cow dung and Ricinus communis leaves, a series of experiments were carried out under mesophilic conditions at 38 ºC using batch fermentation for 30 days. Anaerobic fermentation were carried out by mixing the substrates in five different proportions to obtain suitable mix ratio for maximum bio...
Abstract: Bio-ethanol is a clear liquid alcohol that is made by the fermentation of different biological materials. it is being considered as a potential liquid fuel due to the limited amount of natural resources. This study was undertaken with the objective of producing bio-ethanol from leaves of Desmodium triflorum by fermenting for 16 days. The leaves were first pre-treated with dilute sulfuric acid to ease the hydrolysis of lignocelulosic material and incubated in different substrate con...
Abstract: Alternative energy sources have recently become more and more attractive due to the increasing demand for energy, global warming, depletion of fossil fuels and high prices of petroleum-based fuels. One of the alternative sources of energy is Biogas. In this study, Guizotia scabra sub-species scabra was evaluated for its potential of biogas production codigested with Cow dung (CD ) in five mix ratios under mesophilic condition (38ºC) using batch digester in Botany laboratory of Har...
Abstract: Biogas is eco-friendly alternative renewable energy source produced through anaerobic digestion of organic compounds. In this study, biogas production was evaluated from Prosopis juliflora leaves(PJ) and cow manure (CM) co-digestion in five mix ratios under mesophilic conditions (38ºC) using batch digesters in the Botany Laboratory of Haramaya University to evaluate biogas production potential of Prosopis juliflora leaves through anaerobic digestion alone or in combination with co...
Abstract: Bio- ethanol is suggested as a sustainable fuel which can be produced from renewable resources and reduce the level of greenhouse gases. Therefore, this study was focused on producing bio ethanol fuel from teff (Eragrostis tef) straws in batch fermentation using yeast (Saccharomyces cerevisiae). Fifty grams of acid pretreated and untreated teff straw were incubated with10ml of 1% of yeast under three different temperature (20℃, 30℃ and 40℃) treatments and allowed to ferment o...
Abstract: Biogas is a clean and renewable form of energy and well substitute for conventional sources of energy especially in the rural sector. In response to the need for addressing the adverse impacts of the increasing trend in biomass energy consumption in Ethiopia, the last three recent decades development of more efficient cooking stove technologies and alternative sources of household energy had been realized. The aim of this study was to determine the optimal mix ratio for biogas prod...
Abstract: Biogas is an alternative renewable energy sources and a mixture of different gases, mainly methane and carbon dioxide, resulting from anaerobic digestion of organic matter. In this study, production of biogas from Vernonia amygdalina leaves co-digested with cow dung in anaerobic condition were evaluated under mesophilic condition at 38ºC using a batch mode digester. Biogas production was evaluated from treatments with different mix ratios A (100%VA) B (75%VA+25%CD), C (75%CD+25%VA...
Abstract: Biogas is a well-established fuel that can replace firewood and electricity as an energy source for cooking, lighting, heating and for other purposes in developing countries. Moreover, biogas is a clean, environmental friendly and renewable form of energy generated when micro-organisms degrade organic materials in the absence of oxygen. The aim of this study was to evaluate biogas production potential of avocado fruit peel wastes and goat manure in combination or separately under a...
Abstract: Production of biogas through anaerobic digestion of organic waste materials provides an alternative environmentally eco-friendly renewable energy. In this study, biogas production from co-digestion of cow manure (CM) and Datura stramonium leaves (DSL) in five mix ratios (100%CM, 60%CM:40%DSL, 50%CM:50%DSL, 40%CM:60%DSL and 100%DSL) were evaluated under mesophilic condition at 38ºC using a batch mode digester over 30 days fermentation. In all the treatments, physico-chemical parame...
Abstract: Common beans are grown throughout Ethiopia and an increasingly important commodity in the cropping systems of smallholder producers both for food security and income. However, its production is affected by climate change particularly by intensive drought occurrence. The study of genetic variability under moisture stress areas enables selection of drought tolerant genotypes that would give better yields to ensure food security, especially for poor rural farmers. Therefore, this stud...
Abstract: Malawi’s economy is solely agricultural driven, yet the soils are continuously depleted of major nutrients threatening economic development, food and nutrition security. Besides poor agricultural practices, climate change is one of the major factors exacerbating soil and nutrient degradation in sub-Saharan Africa. Use of blanket fertilizer recommendations to nourish the depleted soils is worsening the situation as it often not matches with the requirement of the soil and maize, t...
Abstract: Rain water harvesting has been practiced for many years and has positively impacted life, agriculture and economy. Despite its known benefit, the adoption of rainwater harvesting is slow in the Mohamud Haybe district, and water scarcity remains a major constraint to life and economic development in the district. This study was conducted to assess rain water harvesting technologies (RWHT) and determinants that affect the adoption of rain water harvesting in Mohamoud Haybe district, ...
Abstract: Potato is the most important vegetable crop in developing countries. Potato cultivation is a labour intensive work. Human labor is still the main source of power used in agricultural works in Ethiopia. Thus, in manual method of planting there is high wastage of human energy, time and effort. This study was initiated to design, manufacture, test and performance evaluation of a prototype tractor mounted potato planter. The prototype planter consisted of main frame, hopper, casing, fu...
Abstract: Warqe/enset processing is carried out dominantly by rural women using traditional tools such as bamboo scraper, serrated wooden tool and metal knife where losses in quality and quantity are exceptionally high. Above all, the traditional way of warqe/enset processing causes to much physically drudgery among the rural women. In an effort to alleviate the problem, an engine driven warqe/enset decorticating machine was designed, constructed, tested and evaluated. The performance evalua...