《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登

“用城市固体垃圾在生物反应器中的压缩性模拟垃圾填埋场力学蠕变和生物压缩性”

作者：Christopher A. Bareither; Craig H. Benson; and Tuncer B. Edil

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2013年7月，139卷第7期，1007–1021页

关键词：生物反应器；压缩；垃圾填埋场；城市固体垃圾；沉降；可持续性

摘要：本文给出了比尺、应力、垃圾离析和垃圾降解对城市固体垃圾力学蠕变和生物压缩的影响。采用了具有相同成分和材料特性的新鲜垃圾进行了直径分别为64mm、100mm和305mm压缩单元的原位缩尺试验（Deer Track 生物反应器试验）。结果表明，力学蠕变压缩比( QUOTE  )和生物压缩比( QUOTE  )不受比尺的影响（即试样尺寸）；新鲜垃圾和降解垃圾的力学蠕变比与新鲜垃圾的 QUOTE  没有受应力影响（即对给定的两种蠕变应力下的垃圾，得到的 QUOTE  和 QUOTE  相似）； QUOTE  的变化与垃圾的压缩指数有关，垃圾的压缩指数是垃圾成分、干容重和干重含水量，或者是纤维素加半纤维素与木质素之比([C+H]/L)的函数。垃圾压缩指数越大，[C+H]/L越大，则 QUOTE  越大。随后得出生物压缩开始经过的时间( QUOTE  )和一阶衰减率(k)依赖于比尺（ QUOTE  随试验尺寸的增长而增长，k随试验尺寸的增长而减小）这一重要关系。最后基于室内试验和经验得到的压缩模型参数给出了一个预测原位缩尺试验压缩性的双模方法。

Compression of Municipal Solid Waste in Bioreactor Landfills Mechanical Creep and Bio-compression

Authors: Christopher A. Bareither; Craig H. Benson; and Tuncer B. Edil

Journal: Journal of Geotechnical and Geo-environmental Engineering, Volume 139, Issue 7 (July 2013), 1007–1021

Key words: Bioreactor, Compression, Landfills, Municipal solid waste, Settlement, Sustainability

Abstract: An evaluation is presented on the effects of scale, stress, waste segregation, and waste decomposition on mechanical creep and bio-compression of municipal solid waste. Laboratory experiments were conducted in 64-, 100-, and 305-mm-diameter compression cells. A field-scale experiment (Deer Track Bioreactor Experiment) was conducted on fresh waste of the same composition and material properties. The mechanical creep compression ratio ( QUOTE  ) and biocompression ratio ( QUOTE  ) were not affected by scale (i.e., specimen size). The mechanical creep ratio for fresh and degraded wastes and  QUOTE   for fresh wastes were not affected by stress (i.e., similar  QUOTE   and  QUOTE   were obtained for a given waste at two creep stresses). Variation in  QUOTE   can be related to the waste compressibility index, which is a function of waste composition, dry unit weight, and dry weight water content, or to the ratio of cellulose plus hemicellulose to lignin ([C+H]/L ). Larger  QUOTE   is coincident with larger waste compressibility index and higher [C+H]/L. The elapsed time for onset of biocompression ( QUOTE  ) and the first-order decay rate (k) are shown to be scale dependent ( QUOTE   increases and k decreases as experiment size increases). A dual-model approach is presented for predicting field-scale compression based on laboratory- and empirically-derived compression model parameters.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000835