The bottom ashes resulted annually from the incineration of municipal solid waste in Europe contain about 400,000 tonnes of metallic aluminium and 200,000 tonnes of heavy non-ferrous metals, such as copper and zinc. E...The bottom ashes resulted annually from the incineration of municipal solid waste in Europe contain about 400,000 tonnes of metallic aluminium and 200,000 tonnes of heavy non-ferrous metals, such as copper and zinc. Efficient recovery of this non-ferrous metal resource requires state-of-the-art separation technologies and a continuous feedback of laboratory analyses of the metal products and the depleted bottom ash to the operators of the bottom ash treatment plants. A methodology is presented for the optimization of the production of non-ferrous metal value from Municipal Solid Waste Incinerator bottom ash. Results for an incineration plant in the Netherlands show that efficient recycling can have a significant impact on value recovery as well as on non-ferrous metal recycling rates, producing up to 8% more revenue and 25% more metals from the ash.展开更多
For quantitative estimation of the intra-layer porous structure in the initial stage of landfill formation with municipal solid waste incineration (MSWI) bottom ash, the water absorption of individual MSWI bottom ash ...For quantitative estimation of the intra-layer porous structure in the initial stage of landfill formation with municipal solid waste incineration (MSWI) bottom ash, the water absorption of individual MSWI bottom ash particles was measured under still-water, degassed, and agitated conditions. The ratio of the water absorption rate found for the still-water procedure to the effective absorption capacity which was the one under degassing was 35.2%. In the water flow experiment of a column filled with MSWI bottom ash, the true density of the bottom ash was higher after water flow than before, which indicated that dissolution of the soluble components of the bottom ash particle surfaces resulted in a loss of apparent particle volume that more than offset the accompanying weight loss. The volume-based water absorption rate found for the bottom ash particles following 50 mL/h water flow through the column, as a ratio to the effective absorption capacity was about 51.8% of the effective absorption capacity. In a landfill layer comprised of MSWI bottom ash, it was suggested that some regions of the ash particle interiors underwent almost no contact with water.展开更多
开展了(炉排炉和流化床炉)两种垃圾焚烧底渣与固化剂共同作用下固化市政污泥的工程特性研究。分析了两种底渣化学成份及物理级配上的差异,重点考察了在密封养护情况下,测定了不同底渣固化体的含水率、pH值、无侧限抗压强度及28d渗透系...开展了(炉排炉和流化床炉)两种垃圾焚烧底渣与固化剂共同作用下固化市政污泥的工程特性研究。分析了两种底渣化学成份及物理级配上的差异,重点考察了在密封养护情况下,测定了不同底渣固化体的含水率、pH值、无侧限抗压强度及28d渗透系数等工程特性指标。研究结果表明:相同含量的两种底渣固化体含水率及pH相同,且含水率随底渣含量增加而降低,而pH值随底渣含量增加而增加;随着底渣含量增加,级配良好的炉排炉底渣固化体强度比级配不良的流化床底渣固化体强度从高8 k Pa增加到30 k Pa;受底渣级配的影响,炉排炉底渣固化体渗透系数随底渣含量增加而增大,而流化床底渣固化体渗透系数基本不变。级配良好的炉排炉底渣固化体工程特性优于级配不良的流化床底渣固化体,具有更强的骨架作用。研究成果为污泥及垃圾焚烧底渣填埋处置提供了科学借鉴。展开更多
文摘The bottom ashes resulted annually from the incineration of municipal solid waste in Europe contain about 400,000 tonnes of metallic aluminium and 200,000 tonnes of heavy non-ferrous metals, such as copper and zinc. Efficient recovery of this non-ferrous metal resource requires state-of-the-art separation technologies and a continuous feedback of laboratory analyses of the metal products and the depleted bottom ash to the operators of the bottom ash treatment plants. A methodology is presented for the optimization of the production of non-ferrous metal value from Municipal Solid Waste Incinerator bottom ash. Results for an incineration plant in the Netherlands show that efficient recycling can have a significant impact on value recovery as well as on non-ferrous metal recycling rates, producing up to 8% more revenue and 25% more metals from the ash.
文摘For quantitative estimation of the intra-layer porous structure in the initial stage of landfill formation with municipal solid waste incineration (MSWI) bottom ash, the water absorption of individual MSWI bottom ash particles was measured under still-water, degassed, and agitated conditions. The ratio of the water absorption rate found for the still-water procedure to the effective absorption capacity which was the one under degassing was 35.2%. In the water flow experiment of a column filled with MSWI bottom ash, the true density of the bottom ash was higher after water flow than before, which indicated that dissolution of the soluble components of the bottom ash particle surfaces resulted in a loss of apparent particle volume that more than offset the accompanying weight loss. The volume-based water absorption rate found for the bottom ash particles following 50 mL/h water flow through the column, as a ratio to the effective absorption capacity was about 51.8% of the effective absorption capacity. In a landfill layer comprised of MSWI bottom ash, it was suggested that some regions of the ash particle interiors underwent almost no contact with water.
文摘开展了(炉排炉和流化床炉)两种垃圾焚烧底渣与固化剂共同作用下固化市政污泥的工程特性研究。分析了两种底渣化学成份及物理级配上的差异,重点考察了在密封养护情况下,测定了不同底渣固化体的含水率、pH值、无侧限抗压强度及28d渗透系数等工程特性指标。研究结果表明:相同含量的两种底渣固化体含水率及pH相同,且含水率随底渣含量增加而降低,而pH值随底渣含量增加而增加;随着底渣含量增加,级配良好的炉排炉底渣固化体强度比级配不良的流化床底渣固化体强度从高8 k Pa增加到30 k Pa;受底渣级配的影响,炉排炉底渣固化体渗透系数随底渣含量增加而增大,而流化床底渣固化体渗透系数基本不变。级配良好的炉排炉底渣固化体工程特性优于级配不良的流化床底渣固化体,具有更强的骨架作用。研究成果为污泥及垃圾焚烧底渣填埋处置提供了科学借鉴。
