Investigation and recognition of biomass with emphasis on biogas production as clean energy with sustainable urban development approach.

Considering the need for developing countries, the use of renewable energy in the countries of the world has been increasing, as one of the indicators of energy development, considering the end of fossil fuels and environmental pollution and the decline in production capacity of this type of fuels in the world. And even in Iran, searching for alternative sources is important economically. Renewable energies range from solar energy to geothermal energy. One of the most renewable energy sources of biomass is renewable energy. This energy, in addition to being renewable, is environmentally friendly. Biomass energy sources can be converted into electrical energy or as energy carriers such as gas or liquid fuels, according to the needs of different sectors of the community. Biomass energy sources are generally derived from materials from plants and living organisms. Unlike most common fossil fuels that are found in the world's most concentrated layers, biomass energy sources are more dispersed, resulting in the accumulation of biomass energy sources in high volumes. On the other hand, protecting the environment and reducing the harmful effects of economic activities on the environmental conditions of human life in the context of the concept of sustainable development, changing the attitude towards resource allocation and achieving maximum economic efficiency. The present study, while investigating the mechanisms of biogas production, shows that by directly using this gas, a wide range of existing industries and systems can be launched, saving valuable resources of fossil fuels such as oil and gas and so on. Therefore, with the development of biogas plants, while having significant socio-economic impacts, urban environmental problems will be less and achieving the goals of sustainable urban development will be easier.