Municipal incineration bottom ash treatment using hydrothermal solidification.
Municipal incineration bottom ash treatment using hydrothermal solidification.
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DOI：
10.1016/j.wasman.2006.01.015
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发表时间：
2007
期刊：
影响因子：
8.1
通讯作者：
Z. Jing;N. Matsuoka;Fangming Jin;T. Hashida;N. Yamasaki
中科院分区：
文献类型：
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作者：
Z. Jing;N. Matsuoka;Fangming Jin;T. Hashida;N. Yamasaki
采用水热法对城市垃圾焚烧底灰进行固化处理，将底灰在5- 20 MPa压力下压模成型，然后在150-250°C饱和蒸汽压力下于高压釜中水热固化10- 72 h。实验结果表明，在MIBA中加入NaOH溶液和新拌水泥对固化体的抗拉强度有很大影响。水热固化温度和时间对固化体抗拉强度的发展有重要影响。强度发展被推测主要是由于1.1nm雪硅钙石的形成。实验室浸出试验测定了固化体中重金属的溶出量，结果表明，在本研究的水热条件下，重金属的浸出量很低。因此，水热处理方法可具有回收MIBA的高潜力。
Solidification of municipal incineration bottom ash (MIBA) has been carried out using a hydrothermal processing method, in which the MIBA was first compacted in a mold at 5–20MPa, and then hydrothermally cured in an autoclave under saturated steam pressure at 150–250°C for 10–72h. Experimental results showed that the tensile strength of the solidified body was greatly influenced by the addition of NaOH solution and fresh cement in the MIBA. The hydrothermal curing temperature and time exerted a significant influence on the development of tensile strength of solidified body. The strength development is speculated to be due primarily to the formation of 1.1nm tobermorite. Laboratory leaching tests were conducted to determine the amount of heavy metals dissolved from the solidified bodies and the results showed that under the hydrothermal conditions of this study the leaching of heavy metals was very low. As such, the hydrothermal processing method may have a high potential for recycling MIBA.