摘要
对经长期填埋后已稳定化的垃圾进行开采和资源化利用,能增加现有填埋场库容,对解决城市生活垃圾填埋场紧张的现状具有重要意义。以一个已运行10a以上的垃圾填埋场为研究对象,对已填埋6、8、10a的矿化垃圾中一些植物大量营养元素的剖面分布进行了测定。结果表明:(1)矿化垃圾中氮、磷、钾养分的浓度总和已达到国家有机肥养分含量标准,有机质含量也明显高于土壤的有机质含量,从植物养分供应的角度看,矿化垃圾可具有资源化利用的价值;(2)矿化垃圾中养分主要以氮素为主,磷、钾营养元素的总量较低,但速效态含量相对较高;(3)不同填埋深度的矿化垃圾中,主要营养元素的含量大部分在填埋8～10a后达到相对稳定的状态,但受矿化垃圾组成成分复杂性的影响,部分形态营养元素的变化规律不明显。
The exploitation and reuse of stabilized refuse after long-term landfill is one of the ways to save the space for landfill of municipal solid waste. In this study, we chose a landfill settlement, which had been run for longer than 10 years, in the suburb of Jiangdu City, and sampled the refuse （aged 6, 8, 10 years, respectively） at different depth to investigate the changing characteristics of C, N, P and K in the refuse profile. Results showed that： （ 1 ） Total N, P and K in aged refuse had reached national criteria of organic manure and organic matter content also exceeded that in soil. Therefore, the aged refuse could be directly used as organic fertilizer products. （2） N was the main nutrient in aged refuse, while total P and K were lower. However, the content of rapidly-available P and K was relatively high. The content of rapidly-available N and K increased significantly with landfill time. But the highest content of P appeared in 6-8 years after landfill. （3） After 8-10 years landfill, most of plant nutrients tested in the refuse in different depth were relatively stable, while some of them kept changing due to the complicated composition of the aged refuse
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2009年第9期1980-1986,共7页
Journal of Agro-Environment Science
基金
江苏省"环境材料与环境工程"重点实验室资助项目
