جستجوی مقالات مرتبط با کلیدواژه "biogas" در نشریات گروه "هنر و معماری"

The limitation of fossil resources and the rapid growth of energy consumption in the world are among the factors that encourage researchers to access new and renewable energy sources. Biogas is one of the most renewable resources that can be used in farms for ranchers. The purpose of this study is to determine the feasibility of producing clean energy from biogas from animal waste in Iranian villages for livestock experts. Fingerprinting has been used in this research. The statistical population of the livestock experts was four provinces of Iran (337 people), who’s sample was 181 according to Morgan table and stratified random sampling. Based on the findings, eight criteria for the feasibility of biogas production were extracted from animal waste, including socio-cultural, economic, technical, skill, environmental, climatic, infrastructure, information, promotion and education. Also, the significance of each criterion in experts in the provinces revealed that in the province of Fars socio-cultural criteria, in Khorasan Razavi province, infrastructure indicators, in Golestan province, economic and in Kermanshah province, the criteria of infrastructure and climate were more important. It is recommended that groups and organizations of livestock breeders be formed in Iran to make biogas available, provide facilities and provide financial resources. Centers to support and train skilled specialists in the field of installation, maintenance and repair of the biogas plant. Also, given the importance of biogas as a clean energy, it is recommended that future research be focused on the social dimension affecting the implementation of biogas. The conditions for the adaptation and development of biogas in different regions should be examined and the assessment of the social impacts of the implementation of biogas, like all development projects, should be carried out.

In the last decades, many companies have erected biogas plants worldwide. A lot of experience was cumulated, leading to a continuous process optimization of anaerobic fermentation and the development of new and more efficient applications. Overall, the basic knowledge of biogas production, the microorganisms involved, and the biochemical processes were widely extended. Biomass embraces products that are derived from photosynthesis that annually, saves an amount equivalent to several times the annual global energy consumption. Thus, biomass is unique in saving solar energy among various types of renewable energy sources. Biomass conversion processes can be physical (e.g. drying, reducing the size or compression), heat (such as coal) or chemical (e.g. biogas production). The final product of the conversion process may be in forms of either solid, liquid or gas. The flexibility to choose the physical form of fuel in biomass resources is an important advantage over the other sources of renewable energy.
Chemical energy in plants is absorbed by animals and humans who digest them. However, biomass is a renewable energy source in the sense that we can always grow the plants and trees, and there is always farmland for agricultural endeavors. There are some examples for the biomass fuels as wood, corn, fertilizer, and disposed garbage. Chemical energy of biomass fuels is released as heat while wood or other flammable garbage may be burned to generate steam and electricity. Burning biomass is not the only way to release their energy but they may be used in other forms of energy, such as methane, ethanol, and biodiesel. Methane is the main component of natural gas. Stinking materials like rotten garbage, agricultural waste and human waste, which are categorized as biogas or methane gas. India and China in the early 1930s began to construct the biogas system extensively. Sporadic studies in Iran in 1970s were conducted by research and academic institutes for biogas production that has led to the construction of biogas. By reviewing the pertinent literature and the energy production and consumption technologies of renewable resources, this study is going to recommend criteria for selection of biomass conversion technologies that are appropriate for energy production from rural solid waste in Tinouj village near Qom. The main objective of this study is to facilitate the selection of an appropriate design for domestic biogas installations.