摘要
鉴于常用填料吸附能力的理化再生方法存在运行费高以及不利于植物生长和微生物活性的缺点，探索低价且生态友好的填料吸附位的再生方法非常重要。该文研究了处理农业污水的人工湿地中的沸石和土壤的氮的解吸附性能、沸石的动态吸附和曝气再生。结果表明：填料的氨氮吸附量受填料的种类、使用时间、填充方式和填充位置的影响。土壤的氨氮吸附量为沸石的3倍以上；沸石使用时间越长，氨氮吸附量越低；前置沸石的氨氮吸附量大于表铺沸石。使用22个月的前置沸石带在0～90cm深度范围内的氨氮吸附量相近；浅层（0～10cm）土壤的氨氮吸附量为中层（10～20cm）和深层（20～40cm）土壤的2倍以上。植物的供氧作用利于土壤的氨氮转化，停留时间的增长利于沸石对氨氮的动态吸附，曝气对已吸附一定量氨氮的沸石有再生作用。
Traditional physicochemical reactivation of packing needs high operating cost and makes against the activity of helophyte and microorganism. Development of reactivation method with low operation cost and ecological risk is important. Nitrogen adsorption performance of zeolite and soil in constructed wetlands treating agricultural wastewater, dynamic absorption and reactivation with aeration of zeolite were studied. Results show that the ammonia and nitrogen adsorption amount of packing is affected by the kinds, service time, filling mode and filling position. Ammonia and nitrogen adsorption amount of soil is three times of zeolite. Ammonia and nitrogen adsorption amount decreases with the increase of its using time in constructed wetland. Preposition zeolite has larger ammonia and nitrogen adsorption capacity than that of the top zeolite. Preposition zeolite belt from 0 to 90 cm has similar ammonia and nitrogen adsorption capacity after being used for 22 months. Ammonia and nitrogen adsorption capacity of superficial soil layer（0～10cm） is twice of that of deeper soil layers（10～20cm and 20～40cm）. The oxygen released by hydrophytes is helpful to the nitrification of ammonia. The lengthening hydraulic retention time is benefit for ammonia and nitrogen adsorption. Aeration has reactivation function on zeolite adsorbing some ammonia.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2006年第11期64-68,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家重大科技专项(十五863项目)"滇池流域面源污染控制研究"(k99-05-35-02)
关键词
人工湿地
沸石
土壤
吸附
再生
constructed wetland
zeolite
soil
adsorption
reactivation
