稳定化飞灰填埋场渗滤液产量预测

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Abstract The construction of stabilized municipal solid waste incineration (MSWI) fly ash landfill has just started in China, hence the corresponding design standards have not been proposed yet. The prediction of leachate production is significantly important for the stabilized fly ash landfills, because it can guide the capacity design of leachate drainage and collection system (LDCS) and leachate storage tank. In this paper, samples were taken from a stabilized MSWI fly ash landfill in Nanjing, China, which involved the filling ages of 0, 1, 3, 6 and 11months. The laboratory study involved the measurements of particle size distribution, moisture content, moisture retention capacity. The uniformity and curvature coefficients were obtained as > 5 and <1, respectively. Hence, the stabilized fly ash was classified as poorly graded soil, indicating that a preferential flow was likely to occur in the fly ash body. The moisture content and moisture retention capacity were obtained in the ranges of 18.6%~46.4% and 15.0%~52.4%, respectively, and both decreased with the filling depth (or overburden stress) and increased with filling age. Based on the test results, a mathematical model was proposed for the prediction of moisture retention capacity. It was found that the moisture content was 2.6%~13.7% lower than the moisture retention capacity at a given filling depth and age. This result indicated that the fly ash at sites has not reached the state of moisture retention capacity as a whole. Then, it was inferred that the leachate collected in the LDCS was probably from the rainfall that infiltrated downward through the macro void in the stabilized fly ash pile, in a way which was called preferential flow. On the above basis, a method was proposed for the prediction of leachate production for the stabilized fly ash landfills, in which the landfill process, rainfall infiltration, preferential flow and moisture absorption property of fly ash were considered. The model parameters were calibrated by using the filed investigating data. The calculated results indicated that the leachate was mainly produced from the rainfall infiltration and waste water for transport vehicles cleaning, accounting for about 48% and 52%, respectively. The results also indicated that the ratio of leachate produced from the preferential flow to the total amount was 34.1% when the volumetric ratio of the macro void to the total void was 20%. Therefore, it is suggested that the stabilized fly ash should be fully compacted in order to reduce the macro void, and the water saving system is also recommended for vehicle cleaning, in order to reduce the total leachate production. This work can provide guidance for the design of LDCS and leachate storage tank of stabilized MSWI fly ash landfills in China.

Key words： stabilized MSWI fly ash landfill leachate production moisture content moisture retention capacity preferential flow

Received: 24 November 2017

X705

Corresponding Authors: 陈萍,副教授,chenp@zstu.edu.cn E-mail: chenp@zstu.edu.cn

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	XU Hui
	CHANG Hong-chen
	MIAO Jian-dong
	CHEN Ping
	ZHAN Liang-tong
	LUO Xiao-yong

Cite this article:

XU Hui,CHANG Hong-chen,MIAO Jian-dong等. Prediction of leachate production from a stabilized MSWI fly ash landfill[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2202-2209.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2202

[1]	刘海龙.城市固废降解-固结-溶质迁移耦合行为及稳定化研究[D]. 杭州:浙江大学, 2016.
[2]	Quina M J, Bordado J C, Quintaferreira R M. Treatment and use of air pollution control residues from MSW incineration:an overview.[J]. Waste Management, 2008,28(11):2097-2121.
[3]	Nie Y. Development and prospects of municipal solid waste (MSW) incineration in China[J]. Frontiers of Environmental Science & Engineering in China, 2008,2(1):1-7.
[4]	宗达,蔡云舒,唐武,等.垃圾焚烧飞灰处置及资源化利用技术进展[C]//中国环境科学学会学术年会论文集(第三卷), 2016.
[5]	杨娜,何品晶,吕凡,等.我国填埋渗滤液产量影响因素分析及估算方法构建[J]. 中国环境科学, 2015,35(8):2452-2459.
[6]	徐辉,詹良通,穆青翼,等.高有机质含量垃圾的含水量监测试验研究——利用表面处理的TDR探头[J]. 中国环境科学, 2014,34(8):2030-2039.
[7]	徐辉,詹良通,李鹤,等.降解和压缩作用下城市生活垃圾的持水量变化[J]. 中国环境科学, 2016,36(8):2409-2417.
[8]	Zhan L T, Xu H, Chen Y M, et al. Biochemical, hydrological and mechanical behaviors of high food waste content MSW landfill:Preliminary findings from a large-scale experiment[J]. Waste Management, 2017,68:307-318.
[9]	Zhan L T, Xu H, Chen Y M, et al. Biochemical, hydrological and mechanical behaviors of high food waste content MSW landfill:liquid-gas interactions observed from a large-scale experiment[J]. Waste Management, 2017,63:27-40.
[10]	Brune M R, Ramke H G, Collins H, et al. Incrustations process in drainage systems of sanitary landfills[C]//Proceeding of 3rd International Landfill Symposium. Cagliari, Italy, 1991:999-1035.
[11]	Grugnaletti M, Pantini S, Verginelli I, et al. An easy-to-use tool for the evaluation of leachate production at landfill sites[J]. Waste Management, 2016,55:204-219.
[12]	Qian X D, Koerner R M, Gray D H. Geotechnical aspects of landfill design and construction[M]. Prentice Hall, Upper Saddle River, NJ, 2002:131-179.
[13]	Schroeder P R, Dozier T S, Zappi P A, et al. The Hydrologic Evaluation of Landfill Performance (HELP) Model:Engineering Documentation for Version 3[R]. Environmental Protection Agency Office of Research and Development, 1994:EPA/600/R-94/168b.
[14]	Xu Q, Kim H, Jain P, et al. Hydrologic evaluation of landfill performance (HELP) modeling in bioreactor landfill design and permitting[J]. Journal of Material Cycles & Waste Management, 2012,14(1):38-46.
[15]	兰吉武,詹良通,李育超,等.填埋垃圾初始含水量对渗滤液产量的影响及修正渗滤液产量计算公式[J]. 环境科学, 2012,33(4):1389-1396.
[16]	SL237-1999土工试验规程[S] (中华人民共和国行业标准).
[17]	徐科,吴立,陈德珍.采用螯合剂稳定垃圾焚烧飞灰中的重金属[J]. 能源研究与信息, 2005,21(2):82-89.
[18]	李燕.紫色土砾石的分布及其对土壤水分性质的影响[D]. 重庆:西南大学, 2006.
[19]	Shao W, Bogaard T, Bakker M. How to Use COMSOL Multiphysics for Coupled Dual-permeability Hydrological and Slope Stability Modeling[J]. Procedia Earth & Planetary Science, 2014,9:83-90.
[20]	CJJ150-2010生活垃圾渗沥液处理技术规范[S](中华人民共和国行业标准).