List of subject articles


    • Open Access Article

      1 - Use of macro-algae as biomass resource for renewable energy production
      mehran parsa Maryam Pazoki hassan hoveidi
      Energy consumption has significantly increased beside of urbanization growth. It may go up so fast that it results in environmental Issues and greater natural resource depletions. Therefore, the use of renewable and clean fuel is considered necessary. Currently, macro-a Full Text
      Energy consumption has significantly increased beside of urbanization growth. It may go up so fast that it results in environmental Issues and greater natural resource depletions. Therefore, the use of renewable and clean fuel is considered necessary. Currently, macro-algae are cultivated in various regions of the world for various industrial and food usages. Macro-algae are known as a specific resource of alternative for energy production due to their biochemical properties such as high level of carbohydrate, lipid and protein. Various biotechnology methods have been developed for energy producing from macro-algae which are divided into two categories: 1) biochemical processes (fermentation, digestion) and 2) thermochemical processes (incineration, pyrolysis, and hydrothermal liquefaction). Depending on the type of methods, the product are categorized under different phases such as solid, liquid and gas. In this study, we will review the methods and studies on the energy production of different species of macroalgae. Manuscript Document
    • Open Access Article

      2 - Environmental effects of sustainable energies (Case Study: Solar, Wind and Hydroelectric Energy)
      fatemeh ghanbari farham amin share
      Increasing air pollution and global warming due to the excessive use of fossil fuels attracted public attention to climate change. Accordingly, the expected increase in demand for other alternative energy sources especialy renewable energy is predictable. While some res Full Text
      Increasing air pollution and global warming due to the excessive use of fossil fuels attracted public attention to climate change. Accordingly, the expected increase in demand for other alternative energy sources especialy renewable energy is predictable. While some research on renewable energy shows that these kind of energy also have undesirable environmental effects. In this study solar energy systems, wind power and hydroelectric power systems wew investigated and their effects on air, soil, sound and effect on wildlife were studied. The results show that although these kind of energy are called clean energy, they have negative environmental effects. This research also suggests ways to prevent the effects of destructive renewable energy sources. Manuscript Document
    • Open Access Article

      3 - Prioritization of energy recovery technologies from municipal solid waste (Case study of Mashhad)
      Arman Shahnazari
      Thermal energy recovery technologies which used to burn solid urban waste are one of the relatively new and appropriate methods in waste management. Heat and gases are generated by burning waste that can be used to generate energy. In this research, a decision model bas Full Text
      Thermal energy recovery technologies which used to burn solid urban waste are one of the relatively new and appropriate methods in waste management. Heat and gases are generated by burning waste that can be used to generate energy. In this research, a decision model based on the Analytic Hierarchy Process (AHP) method is Provided to select the best thermochemical system based on three technical, economic and environmental criteria. In this study, waste incineration, gasification, pyrolysis and plasma systems were evaluated. Collection of required information was obtained by reviewing reliable sources and preparing and completing questionnaires. The study area in this study is Mashhad city. The results of this study indicate that among the studied systems, plasma system (technology) is the best option for energy recovery from solid wastes in Mashhad, after that, waste incineration, gasification and pyrolysis systems are in the next categories, respectively. Manuscript Document