不同水处理工艺的混凝效果比较

该文以宁夏宁东地区黄河水为研究对象，考察了不同混凝条件（常规混凝沉淀池、微涡旋混凝沉淀池、反冲洗水回流沉淀池）下三种水处理工艺对混凝效能的影响。结果表明微涡旋改造有助于提高絮凝池的混凝效果，絮体的沉降性得到改善，“跑矾”现象得到缓解，絮体颗粒数目较折板絮凝池减少，沉淀池出水浊度明显降低；滤池反冲洗水回流技术可以有效地提高浊度的去除率以及改善絮体的沉降性能，且絮体颗粒数目较微涡旋絮凝池有明显减少，说明增加水体中颗粒数目可以有效地提高混凝效果；由分形维数的数据可以看出，微涡旋改造和反冲洗水回流可以明显提高絮体的分形维数，改善了絮体的沉降性。

Comparison of Effects of Different Coagulation Processes in Water Treatment

Performances of different coagulation processes （traditional folding plates flocculator, micro-vortexes flocculator, folding plates flocculator with back washing water recycling） were compared. The results indicate that （ 1 ） micro-vortexes flocculation can improve the coagulation effects. The settlement ability of floes is improved. The particle content in micro-vortexes flocculator decreases compared with traditional folded plate flocculator and the turbidity also decreases. （2） The recycling of filter backwashing water can improve the removal efficiency of turbidity and settle ability of flocs, and the particle content decreases compared with micro-vortexes flocculator. （ 3 ） Micro-vortexes flocculation and return of back wash water can increase the fractal dimension.