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| 分形维数作为废水絮凝处理效果的表征指标及其影响因素 | |
| 引用本文： | 温海龙,董瑞斌,朱升干.分形维数作为废水絮凝处理效果的表征指标及其影响因素[J].南昌大学学报(工科版),2011,33(1):17-21,78. |
| 作者姓名： | 温海龙 董瑞斌 朱升干 |
| 作者单位： | 1. 南昌大学 环境与化学工程学院,江西南昌33003;中国科学院地理科学与资源研究所,北京100101 2. 南昌大学 环境与化学工程学院,江西南昌33003;鄱阳湖环境与资源利用教育部重点实验室,江西南昌330047 3. 南昌大学环境与化学工程学院,江西南昌,330031 |
| 摘 要： | 通过编写MATLAB的二维扩散限制凝聚（DLA）模型程序,对絮体进行模拟仿真,模拟结果表明：絮体呈现内部致密、外部疏松及多孔的结构,用盒子法计算模拟絮体获得的分形维数在1.450～1.725之间。以硫酸铝为絮凝剂处理模拟高岭土废水,利用显微拍摄技术观察絮体结构,并用盒子法计算获得的絮体分形维数在1.36～1.50之间。同时实验考察pH值、絮凝剂用量、混凝温度对絮凝效果的影响,通过单因素实验与正交实验,获得了最佳工艺条件：pH值为6.5,絮凝剂用量为25 mg/L,混凝温度为25℃,在此条件下,高岭土废水经处理后浊度为4.26,絮体的分形维数为1.497。结果表明：絮体的分形维数越大,处理后废水浊度越小。分形维数可作为废水絮凝处理效果的表征指标之一。 |
| 关 键 词： | 分形维数 DLA模型 絮体 高岭土废水 硫酸铝 |
Fractal Dimension as a Characteristic Index of Flocculation Effect of Wastewater and Its Influence Factors |
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| WEN Hai-long,DONG Rui-bin,ZHU Sheng-gan.Fractal Dimension as a Characteristic Index of Flocculation Effect of Wastewater and Its Influence Factors[J].Journal of Nanchang University(Engineering & Technology Edition),2011,33(1):17-21,78. | |
| Authors: | WEN Hai-long DONG Rui-bin ZHU Sheng-gan |
| Affiliation: | WEN Hai-long1a,2,DONG Rui-bin1a,1b,ZHU Sheng-gan1a (1a.School of Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China,1b.Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang 330047,2.Institute of Geographic Sciences and National Resources Research,Chinese Academy of Sciences,Beijing 100101,China) |
| Abstract: | A two-dimensional diffusion-limited aggregation(DLA) model program based on MATLAB platform was written to simulate the structure of flocs.The results showed that simulation flocs expressed the inner-tenuous,external-loose and high porous structure.The fractal dimensions calculated using box-counting method was ranged from 1.450 to 1.750.Meanwhile,aluminum sulfate was used to treat the Kaolin wastewater,then using microscopic photography technology to observe flocs structure.The average fractal dimensions o... |
| Keywords: | fractal dimension diffusion-limited aggregation model floc Kaolin wastewater aluminum sulfate |
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