摘要
对沸石芦苇床去除农田回归水和农村生活污水组成的混合污水中的氮进行了中试研究 .结果表明 ,在0 6m/d的水力负荷下 ,系统对总氮、氨氮、硝酸盐氮、亚硝酸盐氮的平均去除率冬季和春季分别为 3 8 9%和5 8 2 % ,93 1 1 %和 78 84 % ,1 0 0 1 %和 4 8 99% ,3 8 81 %和 98 4 5 % .春季运行效果明显好于冬季 .在相同条件下 ,总氮、氨氮、硝酸盐氮去除率比砾石芦苇床分别高 2 8%、67%、3 5 % .沸石对氨氮的吸附、离子交换 ,微生物的硝化。
In this study, the nitrogen removal efficacy of a pilot scale zeolite reed bed system was tested for the treatment of agricultural wastewater and domestic wastewater etc. At a mean hydraulic loading of 0 6 m/d, the total nitrogen, ammonia, nitrate, nitrite in winter and spring were reduced across the system by 38 9% and 58 2%,93 11% and 78 84%,10 01% and 48 99%,38 81% and 98 45%, respectively. The system performance in spring was much better than in winter. Under the same conditions, the total nitrogen, ammonia, nitrate removal rate of zeolite reed bed were 28%, 67%, 35% higher than that of gravel reed bed. The ammonia adsorption and ion exchange on zeolite and biological nitrogen removal through nitrification and denitrification were the main removal mechanism of nitrogen in the zeolite reed bed.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第3期158-160,共3页
Environmental Science
基金
国家科技部"十五"科技专项 (K99 0 5 3 5 0 2 )
关键词
沸石
潜流型湿地
脱氮
吸附
硝化/反硝化
zeolite
subsurface wetland
nitrogen removal
adsorption
nitrification/denitrification
