| 引用本文: | 付子轼,孙会峰,周胜.促沉装置净化稻田排水面源污染物的效果研究[J].灌溉排水学报,0,():-. |
| Fu Zishi,SUN Huifeng,ZHOU Sheng.促沉装置净化稻田排水面源污染物的效果研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】研究促沉净化装置对稻田径流排水中主要面源污染物的去除效果，探寻适合农田径流排水的原位处理技术。【方法】于2015年在上海市奉贤区青村镇种源研发基地内选取5块稻田，在每块田的排水口处修建一套容积约为1.9 m3的促沉净化装置，内部用多面空心球和沸石按1：2的体积比进行填充，在外围用沸石填充，分析每套装置的进出水中的固体悬浮物、总氮和总磷的质量浓度。【结果】在整个稻季中，使用促沉净化装置对稻田径流排水中的固体悬浮物、总氮和总磷均具有较好的去除效果，其平均去除率分别达到61%、33%和34%。该装置对固体悬浮物和或总磷的去除率与其质量浓度之间存在显著的对数正相关关系，即质量浓度越高，其去除率也越高；但对总氮的去除率与其质量浓度之间则呈一定程度的线性负相关关系。【结论】促沉净化装置对稻田径流排水中主要面源污染物均有较好的去除效果，使用促沉净化装置可在不影响流速的情况下，有效降低径流排水中污染物的质量浓度，改善周边水体环境，维护水体生态系统平衡稳定。 |
| 关键词: 促沉净化；总氮；总磷；面源污染；排水；稻田 |
| DOI： |
| 分类号:S276.7+4 |
| 基金项目: |
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| Study on the Effect of Settling and Purification Device to Purify Non-Point Source Pollutants from Paddy Field Drainage |
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Fu Zishi,SUN Huifeng,ZHOU Sheng
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Shanghai Academy of Agricultural Sciences
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| Abstract: |
| 【Background】Taihu lake region is one of the most important rice production areas in China，and rice-wheat rotation system is typical here. Excessive water and fertilizer inputs and low nutrient use efficency of fertilizers lead to nutrients losses. There is abundant rainfall in Taihu lake region, however, most of the annual rainfall is concentrated in the rice season. The nutrients derived from fertilizers released into rivers through runoff is one of the main causes of non-point source pollution.【Objective】 The objective is to study the removal efficiencies of the main non-point source pollutants in runoff from rice fields by using sedimentation-promoting and purification device and seek for the in-situ technology.【Method】In 2015, five rice fields were selected from the provenance research and development base in Qingcun Town, Fengxian District, Shanghai, and a set of sedimentation-promoting and purification device with a volume of about 1.9m3 was built at the drainage outlets of each field. Each device was filled with plastic polyhedron hollow ball and zeolite with a volume ratio of 1:2 inside, and the outer part was filled with zeolite. Concentrations of suspended solids, total nitrogen and phosphorous were detected in both inflow and outflow when using the devices.【Result】In the rice-growing season, the removal efficiencies in suspended solids, total nitrogen and phosphorous in runoff were 61%, 33% and 34% when using sedimentation-promoting and purification device, respectively. The removal efficiencies of suspended solids by using the device were positively logarithmically correlated with the corresponding concentrations in inflows, as well as total phosphorous. In contrast, A linearly negative correlation was observed in total nitrogen.【Conclusion】The sedimentation-promoting and purification device could effectively remove the main non-point source pollutants in runoff from rice fields. By using the device, the concentrations of non-point source pollutants were mitigated, the water body environment was improved, and the balance in aquatic ecosystem was maintain without affecting the water velocity. |
| Key words: sedimentation-promoting and purification; total nitrogen; total phosphorous; non-point source pollution; runoff; rice paddy |
