Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby, Denmark.
Waste Manag. 2010 Apr;30(4):551-7. doi: 10.1016/j.wasman.2009.11.031. Epub 2009 Dec 29.
Garden waste generation and composition were studied in Aarhus, Denmark. The amount of garden waste generated varied seasonally, from 2.5kgperson(-1)month(-1) in winter to 19.4kgperson(-1)month(-1) in summer. Seasonal fractional composition and chemical characterization of garden waste were determined by sorting and sampling garden waste eight times during 1year. On a yearly basis, the major fraction of garden waste was "small stuff" (flowers, grass clippings, hedge cuttings and soil) making up more than 90% (wet waste distribution) during the summer. The woody fractions (branches, wood) are more significant during the winter. Seasonal trends in waste chemical composition were recorded and an average annual composition of garden waste was calculated, considering the varying monthly generation and material fraction composition: the wet garden waste contained 40% water, 30% organic matter (VS) and 30% ash. The ash content suggests that the garden waste contains a significant amount of soil. This is in particular the case during summer. Of nutrients, the garden waste contained in average on a dry matter basis 0.6% N, 0.1% P, and 1.0% K. However, the contents varied significantly among the fractions and during the year. The content of trace elements (Cd, Cr, Cu, Hg, Ni, Pb, and Zn) was low.
在丹麦奥胡斯对园林废弃物的产生量和成分进行了研究。园林废弃物的产生量随季节而变化，从冬季的人均每月 2.5 公斤到夏季的人均每月 19.4 公斤。通过一年中 8 次分类和采样，确定了园林废弃物的季节分率组成和化学特性。在一年的基础上，园林废弃物的主要部分是“小物件”（花卉、草屑、树篱剪枝和土壤），在夏季占比超过 90%（湿垃圾分布）。木质部分（树枝、木材）在冬季更为显著。记录了废物化学成分的季节性趋势，并计算了考虑到每月产生量和物质分率组成变化的平均年度园林废弃物组成：湿园林废弃物含有 40%的水、30%的有机物（VS）和 30%的灰分。灰分含量表明园林废弃物中含有大量土壤。特别是在夏季更是如此。在养分方面，平均每干物质基础上，园林废弃物含有 0.6%的氮、0.1%的磷和 1.0%的钾。然而，各部分之间以及全年的含量差异很大。痕量元素（Cd、Cr、Cu、Hg、Ni、Pb 和 Zn）的含量较低。
