Abstract: Wastewater contains a variety of chemical, physical and microbial contaminants which may significantly affect soil properties as well as ecosystem function when used for different purposes such as irrigation. Around Harar city, brewery and municipal wastewater has been in use for irrigating some crops cultivated in the area which may have impacted soil properties. The study was aimed to investigate the impacts of brewery and municipal wastewater (BMWW) on selected soil physico-chem...
Abstract: Biogas generation and its utility as an alternative renewable energy source are gaining attention, particularly among developing countries. In this study, biogas production was evaluated from Gosspium barbadense leaves (GB) and cow dung (CD) co-digestion in five mixed ratios (A =100% GB, B=25 % GB+75% CD, C=50%GB+50%CD, D=75 %GB+25%CD, E= 100% CD.) under mesophilic conditions using batch digesters. The daily biogas production was subsequently measured by the water displacement meth...
Abstract: Renewable resources play a significant role in reducing carbon dioxide emissions around the world, and with this in mind, biomass and waste is a candidate to be one of the most widely utilized renewable energy resources. Therefore, this research was conducted to investigate the production of biogas from saw dust, cow dung in solo or mix through anaerobic digestion with five treatment ratios, under mesophilic condition (38ºC) using batch digesters at Haramaya University for 30 days...
Abstract: iogas technology, which is meant to produce methane rich gas through anaerobic digestion of biological materials, is an environmentally friendly technology that decreases environmental pollution through decomposing organic wastes and positively impacts the socio-economy of the society. Therefore, the research was conducted to investigate the production of biogas from corn Stover co-digested with goat manure through anaerobic digestion. In this study, five different proportions of C...
Abstract: Biogas is the methane rich gas produced by anaerobic breakdown of organic wastes with the help of methanogenic bacteria under oxygen free environment. The objective of this study was to evaluate production of biogas from co-digestion of goat manure and sludges of beer under anaerobic condition. The three containers were interconnected with a plastic tube having a diameter of 1 cm. The acidified brime solution was prepared by dissolving NaCl in distilled water with few drops of sulf...
Abstract: Solid waste management is critical issue faced by urban areas worldwide. The rapid increases of population size, urbanization and industrialization resulted in increased generation of solid wastes. Consequently, solid wastes and its management became major public health, environmental and socio-economic concern.This study aimed to investigatethe solid waste management system and associated risk factor of the environment, public health and socio economic aspects;in the case of Adama...
Abstract: Biogas can be produced from any biodegradable feedstock that is suitable for anaerobic digestion. In present day biogas production from barley straw and cow dung was investigated using the number of small reactors. Barley straw was co digested with Cow dung with the aim of biogas production. Five treatment mixtures of Barley straw and Cow dung in ratio of 100% Barley straw(BS), 70% Barley straw(BS) and 30% Cow dung(CD) , 50% Barley straw(BS) and 50% Cow dung(CD) , 30% Barley straw ...
Abstract: Household Solid Waste Generation, characterization and Management Practices in Melka Rafu Town, Kombolcha District of East Hararghe Zone, Ethiopia The rapid increase in population together with expansion of urban centers is producing large volumes of wastes, which demand better infrastructure, institutional setup and community participation for its management. But, most of solid wastes that generated are remaining uncollected and simply dumped at open space. This study focused on i...
Abstract: Household Solid Waste Generation, characterization and Management Practices in Melka Rafu Town, Kombolcha District of East Hararghe Zone, Ethiopia The rapid increase in population together with expansion of urban centers is producing large volumes of wastes, which demand better infrastructure, institutional setup and community participation for its management. But, most of solid wastes that generated are remaining uncollected and simply dumped at open space. This study focused on i...
Abstract: Household solid waste (HSW) has both direct and indirect effects on the environment and human welfare. This is mainly due to the lack of information on the generation rate and physico chemical characterize of the household solid waste property. So, this study aims to determine the generation rate and physico chemical properties of household solid waste in Deder town adminstration, East Hararghe zone, Ethiopia. In order to achieve this objective, soild waste data was collected from ...
Abstract: The most pressing environmental issue in Chiro Town is the growing amount of solid waste generated and the lack of an effective waste management system. The purpose of this study was to determine the present generation rate, physicochemical characterization, and management practices of solid waste generated by households, commercial center and government organizations in Chiro town, Oromia region, Ethiopia. The research was done on households, commercial centers and government orga...
Abstract: Municipal solid waste is defined as discarded items from households, including bulky waste, waste from commerce and trade, institutions, small businesses, yard and garden, street sweepings, and market cleansing. Expansion in generation rate and quality of solid waste composition in municipalities coupled with ineffective management has led to severe environmental problems. This research was initiated to characterize the physicochemical property of municipal solid waste (MSW) in Dil...
Abstract: Dumping of heavy metals wastes has environmental impacts on soil and water at the nearby waste dump sites. The purposes of this study was to identify the sources and also status of selected heavy metals in municipal solid waste and soil at koshe open dumping site of Assela Town. For seven consecutive days metal wastes were manually separated from all wastes dumped at the site to identify the sources of heavy metals.Sources of the metals were categorized under three groups; househol...
Abstract: Knowledge of quantity and composition of urban solid waste is required and considered as a basis for designing and operating appropriate solid waste management systems. Cognizant of this, a study was initiated to characterize the household solid waste generation rate and its physico-chemical composition based on a field survey and waste measurement in Haramaya town, Eastern Hararghe Zone, Ethiopia. For this study households were stratified into three groups based on level of their ...
Abstract: Rapid population growth and expanding urbanization have caused a dramatic increase in type and volume of household solid waste generated in many towns of the country including Morsito town. Most of this solid waste is illegally dumped in open site. The objective of this study was to determine the generation rate and characterize selected physicochemical properties of household solid waste in Morsito Town. A total of 131 households were randomly selected from purposively selected 2 ...