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首页> 外文会议>The ninth international inorganic-bonded composite materials conference >Urban MiningA Gypsum Recycling Model
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Urban MiningA Gypsum Recycling Model

机译：城市采矿石膏回收模型

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Gypsum scrap generated from wallboard manufacturing, construction andrndeconstruction activities in North America, Europe and Japan is a recognizedrnenvironmental problem. Of these regions, the European Union is the most advanced inrndealing with the issue, having enacted legislation to come into effect in July 2005 thatrnwill act to strongly encourage gypsum recycling throughout the EU. An estimated 8 to 15rnpercent of all gypsum used in the wallboard industry becomes recyclable scrap. In thernU.S., 2.5 to 4.5 million tonnes of gypsum scrap is generated each year; the volume isrnsimilar in Europe (the percentage of total tonnage is lower due to higher use of brick andrnconcrete). Landfill disposal of this gypsum scrap is problematic, with deposits oftenrncreating hydrogen sulfide emissions and metallic sulfide groundwater leachate.rnGovernments are examining alternatives to contend with this waste, including the use ofrnEco- fees, increased landfill taxes and government- imposed solutions that could alsorngenerate additional revenues to support other public solid waste programs. These extrarncosts may affect the price competitiveness of gypsum-based construction products and sornan industry-led solution to recycling scrap may be more cost-effective than one imposedrnby government.rnThe Greater Vancouver Region of British Columbia has banned gypsum from itsrnlandfills; as a result, all gypsum scrap is now recycled. New West Gypsum Recycling, arnCanadian firm with recycling plants in Canada, the United States and the UnitedrnKingdom, uses its proprietary technology to process large quantities of wet and dryrngypsum scrap, and incorporate it into new wallboard at percentages ranging up to 25rnpercent. The Vancouver recycling program is examined herein as a case study forrnconsideration by other urban regions in Europe, Japan and the United States.rnRecommendations are provided as to how other regions can implement similar gypsumrnscrap recycling programs.
机译：在北美，欧洲和日本的墙板制造，建筑和拆建活动中产生的石膏废料是公认的环境问题。在这些地区中，欧盟是处理该问题的最先进机构，该国已于2005年7月颁布了立法，该法案将在整个欧盟范围内大力鼓励石膏的回收利用。墙板行业使用的石膏中，估计有8％至15％变成可回收的废料。在美国，每年产生2.5至450万吨的石膏废料；欧洲的体积相似（由于使用更多的砖和混凝土，总吨位的百分比较低）。这种石膏废料的垃圾掩埋处理是有问题的，沉积物经常造成硫化氢排放和金属硫化物地下水渗滤液。政府正在研究与这种垃圾抗衡的替代方法，包括使用生态费用，增加垃圾掩埋税和政府施加的解决方案，这些解决方案也可能产生额外的支持其他公共固体废物计划的收入。这些额外成本可能会影响石膏建筑产品的价格竞争力，而由索尔南工业公司主导的回收废料的解决方案可能比政府实施的方法更具成本效益。英属哥伦比亚大温哥华地区已禁止将石膏运入其垃圾填埋场；结果，所有石膏废料现在都被回收了。加拿大加拿大，美国和英国的回收工厂的新西石膏回收公司使用其专有技术来处理大量的湿石膏和干石膏废料，并将其掺入新墙板的比例最高为25％。本文将对温哥华回收计划进行审查，作为案例研究，以供欧洲，日本和美国的其他城市地区考虑。建议提供有关其他地区如何实施类似石膏废料回收计划的建议。

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