‧Ash Recycling
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At present there are nineteen public incinerators in Taiwan, with the ash slag being produced about 4,830 tons in weight per day. For local governments island-wide, currently the management measures for ash slag mostly involve solidification of fly ashes and landfill of bottom ashes, both of which greatly overload the landfills in Taiwan. By 2004, it was expected that there would be 32 incinerators completed and operating for waste treatment, with the amount of ash slag estimated being 6,245 tons per day, which definitely brought about adverse effect on the environment. |
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In order to conform to government policies, L&A cooperated with ECH, a US-based company specializing in ash recycling, and acquired the exclusive license in Taiwan to take charge of the construction of an ash recycling plant in Yingge District, New Taipei City to treat ash slag with the capacity amounting to 944 tons per day. L&A was also entrusted by Taipei county government to recycle all the bottom ashes produced form the incinerators in Taipei county, hoping to achieve the purpose to extend landfill life, even move towards zero landfill, and meanwhile reduce the exploitation of both land sand and river sand. |
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Fly ashes being treated and recycled are known as class E fly ashes, of which the physical, chemical, and environmental characteristics, after being tested by certified laboratory, are given as follows: ‧The results acquired through a chemical test show that the leaching amounts for cadmium, chromium, mercury, copper, lead, arsenic, and hexavalent chromium conform to TCLP standards. ‧The results acquired through a physical test show that the produced class E fly ashes are completely in accordance with the standards for base aggregates as well as with the standards for CLSM aggregates. |
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The class E fly ashes are normally used to replace natural aggregates as the materials for road basement, or even further processed to produce aggregates of mesh ferrocement, such as CLSM, backfilled sand, revetments, soil-retaining backfill materials, wave breakers, artificial fishing reef, ground bricks, water permeable bricks, grass-planting bricks, etc. |