六角孔网格絮凝工艺中絮体的形态学研究

Morphological Study of Flocs in the Hexagonal Hole Mesh Flocculation Process

结合分形理论对絮体的生长过程进行研究,确定当原水浊度为100 NTU,絮凝时间为12 min,絮凝剂投加量为18 mg.L-1时,经六角孔网格絮凝设备处理后出水水质良好。絮体在絮凝的前期、中期和末期有着良好的形态特征,其分形维数分别为2.080 2、2.208 7和2.135 6,说明了在絮凝过程的前期、中期和末期,絮体密实,空隙率小,密度随之变大,不易被水流的剪切力剪碎,沉降性能好。絮体分形维数随着投药量的增加而增大。投药量达到一定程度后,絮体分形维数开始减小,所以存在一个较为经济的投加量。

Combination of floe strength and fractal theory is studied the aggregate growth. When the raw water turbidity is 100 NTU, flocculation time of 12 minutes, flocculant dosing of 18 mg · L^-1 are Determined, using hexagonal grid processing of wastewater have effluent quality. Floc in the flocculation of the early, middle and late morphological characteristics is good, the fractal dimension is 2. 080 2,2. 208 7 and 2. 135 6, respectively. It is descripted that in the flocculation of the early, middle and late. Floc is compaction, porosity, density along with larger, can not easily be cut into pieces by the shear force of the water flow, and have sedimentation performance. Floc fractal dimension increases with increasing dosage, when dosage reaches a certain level, the floc fractal dimension begins to decrease, so there is a more economical dosage.