A comparison of landfill leachates based on waste composition

被引:146
作者
Moody, Chris M. [1 ,2 ]
Townsend, Timothy G. [1 ]
机构
[1] Univ Florida, Dept Environm Engn Sci, POB 116450, Gainesville, FL 32611 USA
[2] Arcadis US, 3109 W Dr Martin Luther King Jr Suite 350, Tampa, FL 33607 USA
关键词
Landfill leachate; MSWI ash; MSW; Wastewater; ORGANIC-MATTER DOM; BOTTOM ASH; CHEMICAL-CHARACTERIZATION; CONSTRUCTION; DISPOSAL; NITROGEN; AMMONIA; DEBRIS; REUSE;
D O I
10.1016/j.wasman.2016.09.020
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Samples of leachate were collected from fourteen landfills in the state of Florida, United States that contained primarily putrescible waste (municipal solid waste, MSW, and yard waste), MSW incinerator (MSWI) ash, or a combination of both. Assessment of leachates included trace metals, anions, and nutrients in order to create a mass balance of total dissolved solids (TDS). As expected from previously literature, MSW leached a complex matrix of contaminants while MSWI ash leachate TDS was more than 98% metallic salts. The pH of the MSWI ash leachate samples was slightly acidic or neutral in character, which is contradictory to the results commonly reported in the literature. The cause of this is hypothesized to be a short-circuiting of rainfall in the landfill due to low hydraulic conductivities reported in ash landfills. The difference in pH likely contributed to the findings with respect to MSWI ash-characteristic trace metals in leachates such as aluminum. The authors have concluded that the research findings in this study are an indication of the differences between laboratory leachate quality studies and the conditions encountered in the field. In addition, a characterization of organic matter using qualitative and quantitative analyses determined that COD is not an accurate indicator of organic matter in leachates from landfills with a significant fraction of MSWI ash. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:267 / 274
页数:8
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