Abstract: Biogas is eco-friendly alternative renewable energy source produced through anaerobic digestion of organic compounds. In this study, biogas production was evaluated from Cucurbita pepo leaves (CP) and cow dung (CD) co-digestion in five mix ratios under mesophilic conditions (38ºC) using batch digesters in the Botany Laboratory of Haramaya University. Total solid(TS) and Volatile solid(VS), organic carbon, and pH were measured before and after digestion, While carbon to nitrogen ra...
Abstract: Lettuce (Lactuca sativa L.) is one of the most popular leafy salad vegetables for fresh consumption and containhealth-promoting compounds.Hydroponic method is a techniques of cultivation plants using bioorganic liquid fertilizer without soil and is more important than soil because of efficient resourcesmanagement and quality food production. This study,wasaimed to produce bioorganic liquid fertilizer from fermented of fresh chicken manure and onion peels that can be used for hydrop...
Abstract: Biogas production using anaerobic digestion of organic waste materials provides an alternative environmentally friendly renewable energy. In this study, the production of biogas from co-digestion of wheat straw with poultry and goat manure was evaluated in seven treatment under mesophilic condition 380C for30 days of retention time, using a batch digester in Botanical and Central Laboratories of Haramaya University. Total solids, volatile solids, percent moisture content, pH, organ...
Abstract: Sugarcane (Saccharum officinarum L.) is monocotyledonous crop plant that belongs to the Poaceae family that mostly propagates through conventional methods. However, conventional propagation lacks rapid multiplication procedures to commercialize newly released varieties within a short period of time. Hence, the objective of this work was to optimize in vitro micro propagation protocol for two sugarcane varieties (C 86-165 and C 86-12) using shoot apical meristem explants. The two va...
Abstract: Biogas is an alternative and renewable energy source produced through anaerobic digestion of organic matter whereby the organic matter is converted into a combustible gas rich in methane (CH4),solid residue(sludge) and a liquid effluent. The aim of this study was production of biogas from Argemone ochroleuca co-digested with cow manure under mesophilic conditions (38ºC) using batch digester for 30 days of fermentation time. The experimental design was completely random design with...
Abstract: The aim of the current study was to evaluate the effect of different growth substrates on laccase production and to partially characterize it in terms of the effect that pH, temperature and substrate concentration had on its activity. The study was conducted at the National Agricultural Biotechnology Research Center, Holetta. The fruiting bodies of Pleurotus ostreatus were collected from live old Eucalyptus tree barks. The potential of Pleurotus ostreatus in laccase production was ...
Abstract: Biogas is an alternative source of energy that is produced by methanogenic bacteria through the bio-degradation of organic material under anaerobic conditions. In this study, biogas production from co-digestion of the goat manure (GM) and watermelon peels(WMP) in five mix ratios were evaluated under 38ºC using batch fermentation. In all treatments, physico-chemical parameters such as total solid (TS) and volatile solid (VS), organic carbon, and pH were measure before and after dig...
Abstract: The increasing world population led to mass application of chemicals in agriculture to increase food production and meet the demand. Today, attentions are diverted into biofertilizers than the chemical fertilizers. This study was initiated to isolate and characterize rhizobia from Faba bean (Vicia faba L.) and assessment for plant growth prompting substance. Faba bean samples were collected by systematic random sampling from farmers’ fields of three geographically varied location...
Abstract: Echinops kebericho is an erect massive rootstock bearing perennial herbs or shrub belonging to the family Asteraceae. Echinops kebericho, endemic to Ethiopia is a critically endangered medicinal plant. It is among few important medicinal plants of the country valued primarily for root parts. The seeds of Echinops kebericho characterized by short viability period and lose their capacity to germinate very quickly. This study aimed to develop in vitro regeneration of Echinops keberich...
Abstract: This study was aimed to replace the chemical and physical treatment with biological treatment to save the environment. It was concerned with the isolation, screening, and charact erization of heavy metal-resistant bacteria isolated from Kombolcha tannery industry effluent. Different ways were used to select the maximum of isolates resistant to heavy metals. Based on, morphological, gram stain and biochemical tests six resistance bacteria were isolated by using free nutrients agar m...
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: Bioethanol derived from biomass contributed 10 to 14% of the total world energy supply and solved the world crisis such as global warming and depletion of fossil fuels. Therefore, this research is initiated to produce ethanol from biomass such as banana peel which was fermented bcy different concentration of substrates with 0.5% and 1% yeast in different fermentation period’s day, with the aim of optimizing the substrate concentration for ethanol production. The sample (Banana pe...
Abstract: Water is one of the most valuable natural resources, an essential element for life development and human activities (Romeu-Álvarez et al., 2012). The generation of recent information about both the water quality status and sanitation condition is highly important for +intervention. Hence, this study was conducted to assess the quality of drinking water supplied to the residents of Jaja town at the point of water resources well, spring and tap water from January 2021 to June 2022. ...
Abstract: Organic Liquid Fertilizer made from the decomposition of organic material such as plant residue and animal waste through anaerobic fermentation comprises number of growth substances, vitamins, antibiotics, amino acids and useful micro-organisms. The advantage of these fertilizers resolve a deficient of nutrient and provide the additionally faster nutrient supply. Thus, the present study was aimed to produce organic liquid fertilizer from cow manure and groundnut husks through aerob...
Abstract: Natural organic fertilizers used in plant cultivation are characterized by low efficiency and soil-applied in large quantities to obtain high yield. The bioorganic fertilizer obtained through anaerobic fermentation comprises number of growth substances, vitamins, antibiotics, amino acids and useful micro-organisms. Bioorganic liquid fertilizer not only increases bioorganic fertility of crops (in comparison to the control and prototype fertilizer), but also accelerates their maturat...