污泥土地利用需注意的问题

污泥是城市污水处理厂不可避免的产物。随着工业的发展和城市化进程的加快,城市污泥的产量急剧增加。城市污泥中含有丰富的有机质及氮、磷等营养元素,但同时也含有种类较多含量不等的重金属、微量的有机污染物和病原物。所以将产生量巨大、成分复杂的污泥经过科学处理后,使其减量化、无害化、资源化,已成为我国乃至全世界环境界深为关注的课题之一。目前,国内外主要的污泥处置方法有填埋、焚烧和土地利用等。污泥土地利用是城市污水污泥资源化利用的一个重要技术途径,为了保证污泥土地利用更加安全有效,本文提出了污泥土地利用应注意的问题。

The attention problems to land application of sewage sludge

Sludge is an inevitable by product from wastewater treatment Plants. With the development of industry and the rapid process of urbanization, there is a dramatic increase in production of sewage sludge. There are lots of soil nutrients such as nitrogen, phosphorus and organic matter contained in municipal sludge. However there are also heavy metals,or- ganic pollutant and pathogenic bacteria in sludge. So how to yield large, complex components sludge, through scientific treatment, to reduction, stabilization, detoxification and resources, which has become the world＇s environmental sector in China and one of the topics of widespread concern. Sludge disposal technologies include incineration, landfill, land application et. Land application of sewage sludge is an important technical way in sewage sludge resource utilization, in order to ensure that land application of sewage sludge more safe ard effective. In this paper, the problems of land application of sewage sludge should be paid attention to.