Xem 1-20 trên 38 kết quả Waste and recycling
  • Depletion of mineral resources is one of the major problems in the world. We have consumed available resources as if they were unlimited, and at the same time we generate a huge quantity of waste, thereby contaminating the Earth. The amount of waste in our society reflects how much resources we consume. We, as modern society, create more products and packaging which is visually appealing but cannot be easily decomposed. Energy demands, resource limitations, and environmental pollution are closely linked.

    pdf306p wqwqwqwqwq 09-07-2012 17 5   Download

  • Sustainability in natural systems is built on the closed-end process of recycling materials. Our present society produces so much that is not recyclable, like resin-molded chairs and air polluting automobile tires, that it is necessary to apply intention to source reduction and product responsibility. Chapter 18 provides knowledge of municipal solid waste and how to disposal and recovery.

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  • If the 20th century could be characterized by the rapid increase in the production and consumption of materials that helped improving the standards of living, then the 21st certainly has many elements to qualify as the century of recycling. Since the duration of life of a number of wastes is very small (roughly 40% have duration of life smaller than one month), there is a vast waste stream that reaches each year to the final recipients creating a serious environmental problem.

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  • Each section includes chapters with interesting topics. Authors spread around the world have been resolved so we are delighted that this book represents research in promising high. Material properties are described in more creative ways for the standard components or biological materials and sources of natural materials. Commonly used materials such as glass, carbon, epoxy resin, concrete, ... described the characteristics improve or construction work. Waste materials use and recycling is the next step and it is a important way how to save resources and our environment....

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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 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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  • Pulp and paper is a mature industry. Industrialised paper manufacturing in Europe started in the early 19th century (Berkhout, 2005). It is a capital and resource-intensive industry that contributes to many environmental problems, including global warming, human tox- icity, eco-toxicity, photochemical oxidation, acidification, nutrification, and solid wastes (Blazejczak and Edler, 2000). Paper is made of natural fibres, either from wood or from recycled materials. Figure 1 below presents a schematic representation of the production system.

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  • Eleven million tonnes of waste are produced yearly by the European pulp and paper industry, of which 70% originates from the production of deinked recycled paper. Wastes are very diverse in composition and consist of rejects, different types of sludges and ashes in mills having on-site incineration treatment. The production of pulp and paper from virgin pulp generates less waste but the waste has similar properties to waste from the production of deinked pulp, although with less inorganics [...].

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  • Though a quarter of a century has elapsed since the first edition of Business Cycles, the opportunities it opened up for further research remain largely unexploited. The chief exception is Schumpeter's own Capitalism, Socialism, and Democracy. Much has been published on innovation and entrepreneurship, usually with a nod in Schumpeter's direction but no more. Even a work like Yusif A.

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  • Depletion of mineral resources is one of the major problems in the world. We have consumed available resources as if they were unlimited, and at the same time we generate a huge quantity of waste, thereby contaminating the Earth. The amount of waste in our society reflects how much resources we consume. We, as modern society, create more products and packaging which is visually appealing but cannot be easily decomposed. Energy demands, resource limitations, and environmental pollution are closely linked.

    pdf304p baobinh1311 25-09-2012 18 4   Download

  • This study, the first to investigate workplace contamination in areas in Ghana where e-waste recycling and disposal is carried out, focussed on the main centre for this type of work, at the Agbogbloshie scrap market in Ghana’s capital, Accra. One of the numerous similar, though far smaller, operations that take place throughout Ghana was also investigated, at the location of a scrap dealer in Korforidua, a smaller city to the north of Accra. At these workshops, e-waste is recycled in a crude way, primarily involving manual disassembly and open burning to isolate copper from plastics.

    pdf10p cao_can 02-01-2013 19 2   Download

  • 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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  • Looking for an effective conclusion, the speaker might want to remind his audience of the main point of his persuasion which was to promote reducing, reusing, and recycling waste. His conclusion would also be aimed at telling his audience what they might do to vitalize the effort.

    pdf8p kathy209 31-08-2010 68 15   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 61 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.

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  • Batteries are generally galvanic cells which convert chemical energy into electrical energy. As mobile sources of energy, we can no longer imagine life in the modern world without them. Every year in Germany, approximately 1 billion portable batteries are sold, an equivalent of around 30,000 tons (Table 19.1). We can state that 85% of the battery market comprises non-rechargeable primary batteries and 15% rechargeable secondary batteries.

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  • Waste generated for the during the red mud, an industrial ore, aqueous the byproduct, is recycled solution. such processing of were congo of bauxite red from adsorption kinetics Adsorption studied using dose, parameters time as dye concentration, Adsorption adsorption isotherms. dye was followed data The 4.05 adsorbent first rate both agitation The and red to and pH.

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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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  • 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

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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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