污泥堆肥过程中主要性质及氮素转变  

The main characteristics and nitrogen transition in the composting of sewage sludge and straw

作　　者：徐灵[1] 王成端[1] 姚岚[1] 

机构地区：[1]西南科技大学,四川绵阳621010

出　　处：《生态环境》2008年第2期602-605,共4页Ecology and Environmnet

基　　金：四川省教育厅重点实验室项目(2006ZD035)

摘　　要：目前堆肥过程中氮素损失比较严重,通常达到50%左右。针对这一问题,文章以污泥和秸秆为原料,进行了不同配比条件下高温好氧堆肥试验,研究了堆肥过程中各主要性质及各种形态氮素的转化规律。结果表明,堆肥有效实现了污泥无害化、减量化和资源化。在pH值和温度较高条件下的氨气大量挥发是堆肥过程氮素损失的重要途径,且不同的物料配比会对氮素损失造成影响,C/N比低的配比氮素损失较大。适当降低堆料温度、添加酸性物质以降低pH值等措施均可减少氮素损失。Whereas rate of nitrogen losing during composting has been high to be 50%.Aim at the problem,high-temperature aerobic composting testing with different proration conditions using sewage sludge and straw as raw composting materials were conducted. The main characteristics and various of nitrogen transition were studied. The results showed that the composting effectively made sewage sludge harmless, decreasing and resourceful. The ammonia volatilization with high pile temperature and pH value was important way of nitrogen loss during the composting. The.amounts of nitrogen loss were different under different raw material conditions. Nitrogen loss was more with high C/N. Reducing the temperature and pH value of composting materials, adding acidic materials could reduce nitrogen loss.

关 键 词：污泥 堆肥 氮素转变 氮素损失 

分 类 号：X703[环境科学与工程—环境工程]