| 芬顿反应强化污泥脱水试验及机理研究 |
| |
| 引用本文： | 陈韬,邹子介,李剑沣.芬顿反应强化污泥脱水试验及机理研究[J].环境工程,2017,35(4):60-64. |
| |
| 作者姓名： | 陈韬 邹子介 李剑沣 |
| |
| 作者单位： | 北京建筑大学 城市雨水系统与水环境省部共建教育部重点实验室,北京,100044 |
| |
| 基金项目： | 国家自然科学基金，北京高校特色教育资源库项目 |
| |
| 摘 要： | 胞外聚合物(EPS)是影响剩余污泥脱水性能的关键因素。脱水试验过程中,将芬顿试剂和剩余污泥混合,控制芬顿试剂和稀硫酸的投加量,测定剩余污泥的毛细吸收时间和比阻,总结出芬顿反应对剩余污泥脱水性能的影响规律。试验表明:Fenton反应的最佳条件是pH为3,H_2O_2投加量为12.4g/L,Fe~(2+)投加量为1.5g/L,反应12min后,对应的毛细吸水时间(CST)和污泥比阻(SRF)分别为21s和0.3×1012m/kg。分析表明:Fenton反应能够破坏剩余污泥中EPS的蛋白质和多糖成分,瓦解EPS锁水结构,改善污泥的脱水性能。
|
| 关 键 词： | 15N同位素示踪 丹麦草 反硝化 硝酸盐异化还原成铵 植物吸收 |
TRANSFER AND TRANSFORMATION OF 15NO3-IN BIORETENTION AND EFFECT OF DANISH GRASS IN THE PROCESS |
| |
| CHEN Tao,ZOU Zi-jie,LI Jian-feng.TRANSFER AND TRANSFORMATION OF 15NO3-IN BIORETENTION AND EFFECT OF DANISH GRASS IN THE PROCESS[J].Environmental Engineering,2017,35(4):60-64. |
| |
| Authors: | CHEN Tao ZOU Zi-jie LI Jian-feng |
| |
| Abstract: | A simulation experiment was constructed by using 15N isotope tracing technique,to research the transfer and transformation of 15NO3-in the bioretention and effect of Danish grass on this process.The results suggested that in the treatment group (planted group),about 79.6％ of the exogenous 15N was transformed,the percentage of exogenous nitrate nitrogen removed by denitrification,dissimilatory nitrate reduction to ammonium (DNRA),microorganism immobilization,and plant absorption was 32.7％,10.4％,24.2％,and 12.3％,respectively.While in the control group,about 60.5％ of the exogenous 15N was transformed,and the percentage of exogenous nitrate nitrogen removed by denitrification,DNRA and microorganism immobilizationa,was 21.6％,19.5％ and 19.4％ respectively,during the 20 days experiment.According to the test result,denitrification was the dominant pathway for nitrate nitrogen removal,followed by microorganism immobilization and DNRA.In the treatment group,the direct absorption of the Danish grass played a certain role in the removal of NO3-;meanwhile,the denitrification effect and microorganism immobilization was promoted,and the removal of NO3-from the bioretention was accelerated. |
| |
| Keywords: | 15N isotope tracing Danish grass denitrification DNRA plant absorption |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境工程》浏览原始摘要信息 |
|
点击此处可从《环境工程》下载全文 |
|
