Surface topographic characteristics of suspended particulates in reclaimed wastewater and effects on clogging in labyrinth drip irrigation emitters
文献类型：期刊论文
| 作者 | Li, Yun Kai ; Liu, Yao Ze ; Li, Gui Bing ; Xu, Ting Wu ; Liu, Hai Sheng ; Ren, Shu Mei ; Yan, Da Zhuang ; Yang, Pei Ling |
| 刊名 | Agriculture; Water Resources
 |
| 出版日期 | 2012 |
| 卷号 | 30期号:1页码:43-56 |
| ISSN号 | 0342-7188 |
| 中文摘要 | Drip irrigation is the most effective and reliable method for reclaimed wastewater irrigation. Emitter clogging is the major problem for extending the drip irrigation technology. The existence of suspended particulates in irrigation water is the main reason for the emitter clogging. However, the reclaimed wastewater quality is extremely complex, and there is a series of physical, chemical, and biological reactions between suspended particulates and other materials contained such as microorganisms, which make the characteristics of suspended particulates in reclaimed wastewater complicated. In this paper, two types of widely used wastewaters treated with fluidized-bed reactor (FBR) and biological aerated filter (BAF) processes respectively were selected. The scanning electron microscope (SEM) technology and fractal theory were used to quantitatively describe the characteristics of the surface topography of suspended particulates. The results showed that the suspended particulates in two reclaimed wastewater were flocculent and porous. The pore system mainly consisted of solid suspended particulates, and most areas between the particulates were filled with microbes and extracellular polymers (EPS). The complex structure of biofilms was formed. That the biofilms grew and detached in irrigation system and deposited continuously at the inlet and outlet of labyrinth path was the major reason for the emitter clogging. The surface topography of suspended particulates in both reclaimed wastewaters showed fractal and multifractal characteristics, and the fractal dimension could not characterize the local and microsingularity of particulates but multifractal dimension could. The uniformity of the distribution of sediment pores increased with the size. Comparatively, the uniformity of suspended particulates in reclaimed wastewater treated by FBR was lower. With operation of reclaimed wastewater irrigation system, the average discharge of emitters decreased continuously with obvious fluctuations. The clogging degree of emitters was low during the first 256 h, and the clogging degree of the two types of reclaimed water was similar. But then, the degree of clogging increased greatly, and the FBR treatment on the emitters discharge were more obvious than BAF. It was closely related to the growth, detachments and sediment of biofilms in the irrigation system. Hence, using the reclaimed wastewater treated by BAF for drip irrigation is more suitable. |
| WOS记录号 | WOS:000298653400004 |
| 公开日期 | 2014-11-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7998]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Yun Kai,Liu, Yao Ze,Li, Gui Bing,et al. Surface topographic characteristics of suspended particulates in reclaimed wastewater and effects on clogging in labyrinth drip irrigation emitters[J]. Agriculture; Water Resources,2012,30(1):43-56. |
| APA | Li, Yun Kai.,Liu, Yao Ze.,Li, Gui Bing.,Xu, Ting Wu.,Liu, Hai Sheng.,...&Yang, Pei Ling.(2012).Surface topographic characteristics of suspended particulates in reclaimed wastewater and effects on clogging in labyrinth drip irrigation emitters.Agriculture; Water Resources,30(1),43-56. |
| MLA | Li, Yun Kai,et al."Surface topographic characteristics of suspended particulates in reclaimed wastewater and effects on clogging in labyrinth drip irrigation emitters".Agriculture; Water Resources 30.1(2012):43-56. |
入库方式： OAI收割
来源：生态环境研究中心
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