Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo, Japan; Department of Mechanical Engineering, Institut Teknologi Bandung, Bandung, Indonesia.
Department of Mechanical Engineering, Institut Teknologi Bandung, Bandung, Indonesia.
Waste Manag. 2017 Sep;67:106-120. doi: 10.1016/j.wasman.2017.05.022. Epub 2017 May 18.
This study employs wet torrefaction process (also known as hydrothermal) at low temperature. This process simultaneously acts as waste processing and separation of mixed waste, for subsequent utilization as an alternative fuel. The process is also applied for the delamination and separation of non-recyclable laminated aluminum waste into separable aluminum and plastic. A 2.5-L reactor was used to examine the wet torrefaction process at temperatures below 200°C. It was observed that the processed mixed waste was converted into two different products: a mushy organic part and a bulky plastic part. Using mechanical separation, the two products can be separated into a granular organic product and a plastic bulk for further treatment. TGA analysis showed that no changes in the plastic composition and no intrusion from plastic fraction to the organic fraction. It can be proclaimed that both fractions have been completely separated by wet torrefaction. The separated plastic fraction product obtained from the wet torrefaction treatment also contained relatively high calorific value (approximately 44MJ/kg), therefore, justifying its use as an alternative fuel. The non-recyclable plastic fraction of laminated aluminum was observed to be delaminated and separated from its aluminum counterpart at a temperature of 170°C using an additional acetic acid concentration of 3%, leaving less than 25% of the plastic content in the aluminum part. Plastic products from both samples had high calorific values of more than 30MJ/kg, which is sufficient to be converted and used as a fuel.
本研究采用湿式热解（也称为水热）工艺在低温下进行。该工艺同时具有处理废物和分离混合废物的作用，以便后续用作替代燃料。该工艺还应用于不可回收层压铝废物的分层和分离，将其分离为可分离的铝和塑料。使用 2.5-L 反应器在低于 200°C 的温度下检查湿式热解过程。结果表明，处理后的混合废物转化为两种不同的产品：糊状有机部分和块状塑料部分。通过机械分离，可以将这两种产品分离成颗粒状有机产品和塑料块，以便进一步处理。TGA 分析表明，塑料成分没有变化，塑料部分也没有侵入有机部分。可以宣布，通过湿式热解已经完全分离了这两个部分。从湿式热解处理获得的分离的塑料部分产品也含有相对较高的热值（约 44MJ/kg），因此可以将其用作替代燃料。在 170°C 的温度下，使用 3%的额外乙酸浓度观察到不可回收的层压铝的塑料部分与铝部分分层和分离，在铝部分中残留的塑料含量不到 25%。来自两个样品的塑料产品的热值均高于 30MJ/kg，足以转化并用作燃料。
