Study on the Leachate Quality by Using Byproduct Lime for Replacement of Landfill Cover Soil in Waste Dumping Sites

• Main Authors: Lun-Hao Hu, 胡倫豪
• Other Authors: Shui-Wen Chang Chien
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/geu55a

碩士 === 朝陽科技大學 === 環境工程與管理系碩士班 === 94 === Waste dumping site is a main way for final disposal of garbage; up to 2005, there are 174 waste dumping sites still operating in Taiwan. Although the amounts of dumping sites are decreasing year by year, they will pollute our environment if not treated or disposed of properly. At present some problems that are exist in the design and management of waste dumping sites in Taiwan, includes: (1) To get suitable and enough cover soil is not easy that result in depth of cover layer is not enough, and it will bring mosquitoes, bugs and stinks. (2) It costs large sums of money by management of leachate. (3) Some geomembrane might be destroyed in landfill, and the leachate filtered through the groundwater layer. In the study we assessed the leachate quality by using byproduct lime for replacement of landfill cover soil in waste dumping sites. According to the result of the experiment, the leachate pH value is low with organic acid in the initial stage. After we added byproduct lime, the leachate pH value was up with time. At the same time that was advantage of the decomposition reaction for microorganism, and BOD, COD and TOC decrease quickly. In addition, we restrained heavy metal from mobility, and it precipitated by carbonate, sulfate and hydrate. With the result that EC value decreased by removing ions from the leachate. Therefore, using CFB byproduct lime for replacement of landfill cover soil, it will good for improvement of the leachate quality.