轮休对垂直流人工湿地堵塞恢复的影响及其动力学特性

发布时间：2018-06-06 16:27

本文选题：湿地 + 动力学　；参考：《农业工程学报》2017年20期

【摘要】：人工湿地是一种常见的污水处理技术,但一直受到不可避免的堵塞问题的困扰。该研究主要以不同堵塞现象下的垂直流人工湿地模型为对象(可溶性有机物堵塞,不溶性有机物堵塞,加入抑菌剂的不溶性有机物堵塞),在轮休操作下持续测量不同时期孔隙率与渗透系数变化情况,研究3种堵塞类型的恢复规律,并对其动力学进行分析。试验结果表明在相同轮休期下,生物膜堵塞和有机颗粒堵塞恢复效果较为明显,其中,可溶性有机物堵塞、不溶性有机物堵塞装置分别轮休至第9天、第20天后基本达到较好的恢复状态,当轮休时间足够充分,这2种堵塞类型基本可以恢复至正常状态。其中可溶性有机物堵塞恢复速度最快,其次是不溶性有机颗粒堵塞。并在规律研究基础上,进一步推导了2种堵塞类型的渗透系数恢复的动力学。研究同时发现,轮休操作对无机颗粒类堵塞基本没有恢复效果。
[Abstract]:Constructed wetland is a common sewage treatment technology, but has been plagued by the inevitable blockage problem. In this study, the vertical flow constructed wetland models with different plugging phenomena (soluble organic plugging, insoluble organic plugging) were studied. The changes of porosity and permeability coefficient in different periods were continuously measured by adding bacteriostat to insoluble organic clogging, and the recovery law of three types of blockage was studied, and its kinetics was analyzed. The results showed that the recovery effect of biofilm blockage and organic particle blockage was obvious under the same rotation period, in which soluble organic plugging and insoluble organic plugging devices were rotated to 9 days, respectively. After the 20th day the two types of blockage can be restored to normal condition when the rest time is sufficient. The recovery rate of soluble organic plugging was the fastest, followed by insoluble organic particle blockage. On the basis of the study of the law, the kinetics of the restoration of the permeability coefficient of two types of clogging is further deduced. At the same time, it was found that the rotation operation had no recovery effect on inorganic particle clogging.
【作者单位】：杭州电子科技大学材料与环境工程学院;浙江大学建筑工程学院市政工程研究所;
【基金】：国家水体污染控制与治理重大专项(2011ZX07301-004)
【分类号】：X143;X703

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