污泥堆肥产物在农业利用中的潜力和问题

Potentials and Problems in Application of Composted Sewage Sludge to Agricultural Utilization

污泥堆肥处理被认为是适合中国国情的污泥处理处置方式,但其产物的出路是污泥堆肥产业化过程的关键问题。通过总结和分析国内外大量的研究,发现污泥堆肥产物含有丰富的有机质和氮、磷等营养元素,具有潜在的肥力;农业利用对污泥堆肥产物具有潜在需求;污泥堆肥处理后,重金属活性降低,有机污染物得到不同程度的降解,达到农用目的。因此,污泥堆肥产物在农业利用中具有广阔的应用前景和市场。

Composting is one of sewage sludge treatment and disposal methods, which is suitable for Chinese national conditions, while the outlet of sewage composting products is key to the industrializa- tion of compost. A large number of studies from home and abroad were summarized and analyzed, and the results indicated that abundant organic matter, nitrogen and phosphorus elements in composting prod- ucts could be used by crops, the potential demand for composting products in agricultural industry was very large. The bio-availability of heavy metals was decreased and organic pollutants were degraded to different extents during the sewage sludge composting. Therefore, sludge composting products have broad application and market prospects in agricultural utilization.