| 毛管逆滤渗污水净化反应器原理研究及室内试验验证 |
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| 引用本文： | 于颖多,雷廷武,林聪,肖娟,张静.毛管逆滤渗污水净化反应器原理研究及室内试验验证[J].农业工程学报,2004,20(2):45-48. |
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| 作者姓名： | 于颖多 雷廷武 林聪 肖娟 张静 |
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| 作者单位： | 现代精细农业系统集成研究教育部重点实验室,北京,100083;中国农业大学水利与土木工程学院,北京,100083 |
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| 摘 要： | 污水回用是解决城市缺水问题的一条有效途径。该文提出了一种新方法，尝试利用多孔介质毛细管作用过滤生活污水。制造了4个毛管逆滤渗污水净化器，采用普通河砂作为过滤介质进行了室内试验。试验采用两个因素：水势差、滤池内外径比。水势差选取4个水平：0.11、0.26、0.41、0.56 m，外层与内层水池直径比选取3个水平：14/6、12/6、10/6，以研究利用毛细管作用净化污水的可行性，并定量确定水势差及内外层水池的相对大小对该系统运行效果的影响。用反应器去除污水COD的多少来评价过滤效果。结果表明，过滤速度及净化效果与水势差之间呈极显著的对数相关关系，两者都随着水势差的增大而提高。当水势差为0.56 m时，COD的去除率可高达80%左右，过滤速度可以高达0.15 m/h。外层与内层水池的直径比(D/d)越大滤速越小,但该比值对COD的去除率无明显影响。该装置在运行过程中，污水被过滤介质所覆盖，有效地避免了污水的刺激性气味和蚊蝇孳生对周边环境的影响。
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| 关 键 词： | 生活污水 逆滤渗 毛细管作用 过滤速度 水势差 过滤效果 |
| 文章编号： | 1002-6819(2004)02-0045-04 |
| 收稿时间： | 2003/8/26 0:00:00 |
| 修稿时间： | 2/9/2004 12:00:00 AM |
New concept of reversed capillary filtration reactor for domestic wastewater treatment and its laboratory verification |
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| Yu Yingduo,Lei Tingwu,Lin Cong,Xiao Juan and Zhang Jing.New concept of reversed capillary filtration reactor for domestic wastewater treatment and its laboratory verification[J].Transactions of the Chinese Society of Agricultural Engineering,2004,20(2):45-48. |
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| Authors: | Yu Yingduo Lei Tingwu Lin Cong Xiao Juan and Zhang Jing |
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| Abstract: | Treatment of domestic wastewater is of importance in bettering environment and easing water shortage problem. A new method was advanced to use capillary phenomenon existing in porous medium to filtrate domestic wastewater. River sands were used as filtration media for the laboratory trials with four specially made prototypes of Reversed Capillary Filtration Reactor (RCFR). The purposes of the experiments were: i). to verify the feasibility of the method, and ii) to quantify the effects of the water potential difference in media (WPDM) and the relative dimensional ratio of the diameters of the outer cylinder to that of the inner cylinder wastewater tank (ROI) on the performance of RCFR. Four WPDMs (0.11, 0.26, 0.41, 0.56 m) and 3 ROIs (14/6, 12/6, 10/6) were used in the experiments. Percentage of COD removed from the effluent in the filtration process was used as an index to evaluate the filtration effectiveness of the RCFR. The experimental data showed very good logarithmic correlative relationships of filtration discharge rates and removal efficiency with WPDM values. The filtration discharge rates and COD removal percentage increased with WPDM. At 0.56 m WPDM, the COD removal efficiency had the highest value of about 80%, with filtration discharge rate reaching 0.15 m/h. The ROIs had no significant impacts on COD removal efficiency but clearly had notably inversed influence on the filtration discharge rate, the higher the ROI, the lower the discharge rate. With RCFR, wastewater was under cover of the filtration media, which diminished the emission of bad smell from wastewater to the air environment as well as the swarms of flies. |
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| Keywords: | domestic wastewater reversed filtration capillarity filtration discharge rate water potential difference in media filtration efficiency |
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