Xem 1-20 trên 21 kết quả Water recycling
  • In order to maintain economic development and minimize future regional and international conflicts, the United States will need sustainable supplies of high-quality fresh water. Solutions to local water scarcity issues will likely require a combination of approaches, including demand management, improved water storage capacity, water quality protection, and advancements in supply-enhancing water treatment technologies. Desalination technologies can create new sources of freshwater from otherwise impaired waters such as seawater or brackish water.

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  • Environmental Water - Advances in Treatment, Remediation and Recycling has many contents: the environment, water resources, environmental pollutants, types of pollutants, methods of water treatment.

    pdf216p doremon3244 04-06-2014 18 8   Download

  • (BQ) Ebook Earth science: Water Cycle and Weather presents about why can’t you drink salt water? How do scientists classify clouds? How do scientists classify clouds? does each tool measure? Water is recycled through the water cycle; cause and Effect what causes a cold front? What effects does a cold front have on weather?.

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  • Onsite treatment of wastewater and onsite dispersal of treated wastewater is not a new concept. Throughout the history of civilization in this country and other places in the world, onsite wastewater systems have been and will be an integral part of the overall wastewater management infrastructure. Onsite wastewater systems are here to stay and the U.S. Environmental Protection Agency (EPA) views adequately managed onsite systems as a cost-effective and long-term option for meeting public health and water quality goals, particularly in less densely populated areas....

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  • Wastes are very process-specific but the key pollutants can be derived from knowledge of: the process, construction materials, corrosion / erosion mechanisms and maintenance materials. Waste audits are used to gather information on the source, composition, quantity and variability of all wastes. Waste prevention typically involves preventing the arising of waste at source, minimising the arisings and recycling any waste that is generated.

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  • The bleached pulps were screened prior to sheet preparation. All analyses were performed according to ISO and SCAN standards, except for the carbohydrate analysis of straw which was done by high-performance anion-exchange chromatography (HPAEC). The ashing was conducted at 550°C for 12 h. The mechanically refined pulp after hot water treatment was fractioned with a Bauer McNett apparatus. The paper technical properties were determined from the combined 100 and 200 mesh fractions.

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  • This section illustrates that MBT systems can be described as two simple concepts: either to separate the waste and then treat; or to treat the waste and then separate. In some systems only biological treatment is required to treat all the residual MSW before disposal to landfill. Whilst a variety of treatment and mechanical separation options are offered, these need to be optimised in terms of the outputs in order to find outlets for the various materials / fuels derived from the process (see Markets for the Outputs section). ...

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  • These papers describe environmentally conscious design technique in the field on buildings and architecture: how to minimize the negative environmental impact of buildings by enhancing the energy efficiency, water efficiency, use sustainable (renewable or recyclables) materials of construction. Section 4 is a collection of articles related to sustainable agriculture and food security: systems of food production that provide secure supply to meet the world growing population.

    pdf308p wqwqwqwqwq 18-07-2012 63 23   Download

  • Engineers . . .Build products such as cell phones, home appliances, heart valves, bridges, & cars. In general they advance society by building new technology. Develop processes, such as the process to convert salt water into fresh water or the process to recycle bottles. These processes change how we live and what we can accomplish.Decisions made by engineers usually have serious consequences to people often to multitudes of people.

    ppt58p hongthuy1994 26-12-2012 54 10   Download

  • Greening the staff café or kitchen can involve using energy and water efficient fittings, selling locally produced organic food to composting and recycling wastes.

    pdf39p vantrungtran 01-02-2010 60 9   Download

  • Một nghiên cứu lĩnh vực sử dụng có lợi của chất thải rắn ao cá trồng lúa WS thành lập Trong mùa mưa năm 2007 tại trang trại thí nghiệm của Cửu Long Viện nghiên cứu lúa gạo. Ba liều lượng chất thải ở mức 1, 2 và 3 tấn / ha kết hợp với ứng dụng 1/3 và 2/3 liều Phân bón vô cơ. Tỷ lệ 100% Phân bón vô cơ (60N- 40P2O5-30K2O) phục vụ như là kiểm soát. Không có sự khác biệt đáng kể trong sản lượng nông nghiệp lúa Tất cả điều trị hơn.

    pdf24p xau_la 09-02-2012 36 9   Download

  • The environmental goods and services  (EGS) sector has  traditionally  included solutions  for problems  such  as  air, noise  and marine pollution,  land  and water  contamination,  as well  as  activities  such  as  environmental  analysis  and  consultancy  and  waste  management  and  recycling.  However  more  recently,  the  definition  of  this  sector  has  widened.

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  • In  the  past,  environmental  goods  and  services were  seen  as  having  limited  economic  importance.  Now, environmental issues and activities pervade every aspect of our economic life and performance  and  are  subject  to  challenging  national  and  international  targets,  strict  monitoring  regimes  and  ongoing  discussion  and  debate  in  the  media.  As  understanding  of  environmental  challenges  has  grown, so too has appreciation of the size of the market and the associated business opportunities.

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  • Ecosystems provide a wide variety of marketable goods, fish and lumber being two familiar examples. However, society is increasingly recognizing the myriad functions—the observable manifestations of ecosystem processes such as nutrient recycling, regulation of climate, and maintenance of biodiversity— that they provide, without which human civilizations could not thrive. Derived from the physical, biological, and chemical processes at work in natural ecosystems, these functions are seldom experienced directly by users of the resource.

    pdf290p phoebe75 01-02-2013 21 7   Download

  • Điều trị và tái chế chất thải và đất từ các ao cá ở đồng bằng sông Cửu Long để cải thiện sinh kế và giảm ô nhiễm nước

    pdf18p xau_la 09-02-2012 16 6   Download

  • Environmental engineering is the application of science and engineering principles to protect and utilise natural resources, control environmental pollution, improve environmental quality to enable healthy ecosystems and comfortable habitation of humans. It is based on multiple disciplines including geology, hydrology, biology, chemistry, physics, medicine, engineering, management, economics, law, etc.

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  • European society and the European economy do not yet exploit the full potential for resource efficiency. Much recyclable waste is either exported or sent to landfill. A lack of long-term frameworks holds back planning and investment, most obviously on a climate and energy framework beyond 2020, but also on long term sustainable use of key resources such as air, soil, energy, water, fish and biomass. At the same time, such frameworks can help to galvanise the innovation needed to exploit the potential of the transition to a low-carbon economy in areas like transport, energy and agriculture....

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  • We are also gaining industry recognition for projects around the globe. at a trophy class a office building in los angeles, California, we worked with the property managers to perform extensive retrofits on lighting and water systems, expanded building and tenant recycling programs, and ensured that all janitorial products were lEED-compliant and Green seal-certified. the property consistently achieves EnERGy staR labels, and in 2009, received a lEED-Eb o&M silver certification.

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  • Biofertilisers are defined in this application as microbial inoculants, isolated from soil or the rhizosphere of plants, assisting the mobilisation of soil nutrients such as N and P and others in the plant rhizosphere and thus promoting the growth rate and yield of plants. Successful biofertilisers can contribute to increases in food production in a highly sustainable manner, with economic and environmental advantages.

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  • The goal of the CWA (also known as the 1972 Federal Water Pollution Control Act (FWPCA) Amendments) is to eliminate entirely discharges of pollutants from point sources (i.e., individual discharging facilities) into surface waters. Although eliminating pollutant discharges may be achievable under some circumstances through process changes that prevent pollutant formation or recycle wastes, the goal is largely rhetorical.

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