AURA Ochrona Środowiska (AURA Environmental Protection) 2018/09

  • Combined generation of electricity, heat based on biogas fuels - cogeneration units (CHP)
    Principle of operation The basic cogeneration system consists of a motor, a protection system, a switchgear, auxiliary drives and an automatic oil refilling installation. The biogas-powered piston engine is based on a common shaft with a synchronous generator - the operation of these devices allows the production of electricity and heat, which can be used in your own company or sold to the network. As a result of biogas combustion, the engine generates heat, which is partially absorbed by the heat exchanger system, while part of it is radiated from the engine body to the atmosphere. Heat through the water system (90/70° C), integrated with the CHP module, is discharged to the external installation and can be used for heating or technological process. Cogeneration devices can operate 24 hours / day throughout the year. High efficiency of CHP aggregates (about 90%) can provide measurable economic benefits, reimbursement of about 25% of the device's cost per year for 10 years. Depending on the user's requirements, CHP modules can be installed inside the hall or container, which are equipped with sound absorbing casings, noise suppressors, superordinate control cabinet, enabling control of the device operation, synchronization with the power grid, monitoring and visualization of CHP system parameters. The basis for the selection of the cogeneration module are properly balanced energy needs (heat and electricity). The optimal solution is when the produced energy is fully used for the energy needs of the company, which the device uses ...
  • There is a board, there is a rub
    Do you remember this phrase from the "Dudek" cabaret? "There is a forest, there are trees, it is cut, it grows, there is a board, there is a rub." It can be treated literally and metaphorically. However, this does not take into account the seriousness of subsequent decisions of the United Nations, which recognize forests as the highest good of humanity. The slogan: "Forests for people" - forests for people, is to consolidate this belief, support successfully the battle for greenery. The tree inspires, teaches, protects. Forests are the most biodiverse terrestrial ecosystem - the home for most animals, plants and insects. And, of course, they give breath to billions of people. They embody what is good and strong in our lives. One fourth of mankind knows about it, depending directly on the forest ...
  • Urban agriculture: needs, hopes and realities of cultivation in an urbanized environment
    In the previous parts of the cycle, the chances for the development of urban agriculture were discussed above all in economic and social contexts. This article will address mainly planning and management aspects. Relations between the city and suburban areas. In cities effectively planned, there are clear boundaries between urban and suburban zones. In such conditions, it is easier to systematize the crop typology appropriate for individual city zones and properly profile them in terms of key benefits - economic, environmental, social, cultural, educational, etc. It is different in cities in crisis, such as the previously mentioned Havana or Detroit. As a result of economic collapse and decapitalisation of buildings, there is a significant supply of plots in the city centers ...
  • Analysis of water needs on the example of rubber tree plantations in Bongo (Côte d'Ivoire)
    The phylum necrosis of the rubber tree is a disease of the stem, manifested by the change of phloem tissues in which latex tissues are found. Even in the case of very serious disease attacks, cambium and xylem remain functional. Considering the continuous growth of cells in the cambium, the layer of non-functional (brown-necrosized) cells producing latex is pushed out. This disease mainly affects adult trees from which latex is taken ... In this study, the transfer of water in rubber tree plantations was analyzed, taking into account the soil, rubber tree trunk and atmosphere as a physical unity in which the processes affecting the water cycle are interdependent. The water potential and flow resistance of the transpiration stream through the roots, the stem sector on the graft node, the stem and leaves on healthy rubber trees and phloem necrosis trees were measured.
  • Nature is the greatest ally in the fight against climate change
    Climate change is, according to many people, the biggest challenge facing humanity. At the end of 2017 in the article Fri World Scientists; Warning to Humanity: A Second Notice, signed by over 15 thousand. representatives of the world of science from 184 countries, the authors warned that it may soon be too late. In July 2018, a very strong voice came from the Vatican, where the symposium took place, to support, among others, COP24 in Katowice. Cardinal Peter Turkson at the opening stated that our planet "is on the verge of an unprecedented, global catastrophe."

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