摘要
通过对昆明市5个污水处理厂污泥的实地采样，以常规方法对污泥进行了化学分析，同时在昆明周边林地进行土壤调查。结果显示，昆明污水处理厂污泥的含水率在80％以上，pH7～7．5，属中性反应；有机质含量、全氮（TN）、磷（TP）含量分别为567、51．4、57．2g·kg^-1，TN、TP养分大大高于传统农家厩肥中的含量。而昆明周边林地土壤中养分缺乏，需要适当的林地施肥。最后提出，林地利用是污泥资源化的有效途径。但由于污泥中含有大量有毒、有害物质，污泥的林地长期施用仍存在潜在风险，对环境及生产的实际影响仍需要长期、定位的试验研究。
Based on the chemical analysis of sludge from five sewage treatment plants of Kunming and investigating the character of forest land surrounding kunming, the results show that the content of sludge moisture is above 80% with pH value as 7 to 7.5, and the organic matter and total nitrogen and total phosphorus are 567 and 51.4 and 57.2g/kg respectively. Both TN and TP are too much higher than those in the manure when the soil of forest land is short of nutrition. It is suggested that municipal sludge can be used as the fertilizer for the forest land effectively in Kunming. However, because of great deal of harmful substance in municipal sludge, further experiments need to be done on studying the effect of long - time and fixed - point research of municipal sludge application on forest land.
出处
《环境科学导刊》
2009年第6期83-86,75,共5页
Environmental Science Survey
基金
云南省教育厅"昆明城市污泥林用后磷的形态与转化研究"(07Z10720)
关键词
市政污泥
特性
林地利用
昆明
municipal sludge
character
forest land application
Kunming
