絮凝体DLCCA模型仿真及其废水处理  

Simulation on flocs using DLCCA model and its application on wastewater treatment

作　　者：赵中华[1] 邱祖民[1] 蒋文天[1] 秦朝燕[1] 

机构地区：[1]南昌大学环境科学与工程学院,江西南昌330031

出　　处：《计算机与应用化学》2010年第5期640-644,共5页Computers and Applied Chemistry

基　　金：江西省自然科学基金项目(0620060);江西省主要学科学术带头人培养对象资助(赣科发计字[2006]155号)

摘　　要：以MATLAB为平台,编写二维有限扩散集团凝聚(Diffusion-Limited Cluster-Cluster Aggregation,DLCCA)模型程序,模拟絮体的生成并计算分形维数,该过程对探讨絮体的生成机理与分离沉降本质有着重要的理论价值,同时,也可指导优化废水处理的实际过程。通过对絮凝体DLCCA模型仿真,将模拟成果用于指导处理印钞废水的研究。计算结果表明:模拟絮体的分形维数在1.47左右,与其他人的研究相近。以聚硅硫酸铁铝(PSFA)为絮凝剂处理印钞废水,发现絮体的分形维数与絮凝剂用量呈先升后降的趋势,分形维数在1.09～1.40之间。比较模拟絮体与以PSFA作为絮凝剂处理印钞废水获得的实际絮体发现,两者十分相似。DLCCA比DLA模型模拟絮体在分形维数和形态上接近实际絮体,说明絮体的凝聚过程用DLCCA模型去描述更好。A two-dimensional Diffusion-Limited Cluster-Cluster Aggregation （2d-DLCCA） model program based on Matlab platform was written and was used to simulate the aggregation process of floes and calculate the fractal dimensions of floes. It is worthier theory on studing the mechanism of formation and settlement separate of floes, and is worthier directions for optimizing the wastewater treat- ment real process. By simulation on floes using DLCCA model, the results have been used as references on treat banknote printing concentrated wastewater treatment. Calculation results showed that the fractal dimensions was about 1.47, which was analogous to the ones obtained by other researchers. Practical experiment, with polysilicate ferro-aluminum sulfate （PSFA） act as coagulation to treat banknote printing concentrated wastewater, was also carried out to compare the fractal dimensions between actual floes and simulation floes. Result showed that average fraetal dimensions for actual floes ranged from 1.09 to 1.40. It was found that simulation floes and actual floes displayed high similarity in morphology. Compared with DLA model, floes simulated through DLCCA model showed a better a Similarity both in morphology and fractal dimensions with actual floes, which mean that DLCCA model is a more practical model in floeeulation process simulation.

关 键 词：二维DLCCA模型 絮凝体 仿真 印钞浓缩废水 聚硅硫酸铁铝 

分 类 号：TQ019[化学工程]