![]() ![]() Biogas containing 55% CH 4 has a calorific value of 21.5 MJ/Nm 3, while pure CH 4 has a calorific value of 35.8 MJ/Nm 3, therefore this is the reason to remove CO 2 from raw biogas. Raw biogas consists mainly of 50–75% methane (CH 4), 25-50% carbon dioxide (CO 2) the rest is composed of water vapor (H 2O) and traces of oxygen (O 2), nitrogen (N 2), and hydrogen sulfide (H 2S). Methane fermentation is well known to occur in nature, for instance, in the process of organic matter decay in an oxygen-deprived environment such as landfill wastes and swamps. Development of a national biogas production sector can significantly contribute to the establishment of new enterprises, bring more income to rural areas, create new jobs and improve living standards. The biogas technology can also produce a vehicle fuel and substitute fossil gas when upgraded to methane. Successful implementation of biogas technologies transforms costly, environmentally damaging and socially sensitive issues of fossil fuel dependence, environmental pollution, Greenhouse Gas (GHG) emissions and waste utilization into a profitable solution producing electricity, heat and biofertilizers. Biogas is a form of renewable fuel and an energy source, it is a combustible gas mixture produced during anaerobic fermentation of biomass by bacteria. Replacing fossil fuels with renewable energy alternatives has become a major global issue of the XXI century and a key to sustainable development. carbon dioxide) is required to flush the experimental plant.The human population on the Earth is steadily growing which leads to the increase in food and energy demands and aggravates the environmental challenges. potatoes or maize can be used to produce the substrate. ![]() Anaerobic biomass from a biogas plant is required for the experiments. The experimental plant enables both a continuous and a discontinuous (batch) operation mode. #Design biogas plant pdf viewer Pc#The measured values can be transmitted to a PC via USB and analysed with the GUNT software. The system is controlled by means of a PLC which is operated via a touch screen. Subsequently, the flow rate, humidity, methane content, carbon dioxide content and temperature of the biogas are measured. The resulting biogas is dried in a column. Temperature and pH value are controlled in both reactors. The digestate is collected in a separate tank. This two-stage method enables the ambient conditions to be adjusted and optimised in both reactors separately. It contains mainly methane and carbon dioxide. The biogas forms in the second stirred tank reactor in the last step of the anaerobic degradation. Here, anaerobic microorganisms convert the long-chain organic substances into short-chain organic substances. ![]() It is hydrolysed and acidified in the first stirred tank reactor. The substrate is a suspension of shredded organic solids. The experimental plant CE 642 serves to demonstrate the generation of biogas in a practical manner. The product of this anaerobic degradation is a gas mixture which primarily consists of methane. In a biogas plant, microorganisms biologically degradate the organic starting substances (substrate) under exclusion of light and oxygen.
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