Assessment of hydraulic flocculation processes using CFD

作者：Vadasarukkai Yamuna S; Gagnon Graham A^*; Campbell D Reid; Clark Sarah C

来源：Journal American Water Works Association, 2011, 103(11): 66-+.

DOI：10.1002/j.1551-8833.2011.tb11567.x

Assessment of hydraulic flocculation processes using CFD Yamuna S. Vadasarukkai, Graham A. Gagnon, D. Reid Campbell, and Sarah C. Clark
Optimization of mixing and coagulation is paramount in the effort to optimize removal of dissolved contaminants and particles in a full-scale treatment plant. This study used a numeric modeling technique-computational fluid dynamics (CFD)-to evaluate the existing flocculation facilities at the J.D. Kline Water Supply Plant in Halifax, Nova Scotia. Several plants across Canada have similar infrastructure. These designs are based on a relatively older design approach and there is a need for evaluating the design in terms of local hydrodynamic parameters, which can be predicted effectively by CFD applications.
It was demonstrated through this study that the flocculation tanks were not adequately mixed for effective floc formation. Practical outcomes of operating under ineffective mixing conditions in a treatment plant may lead to potential negative consequences such as poor floc formation, reliance on excess flocculant aid, decreased incorporation of dissolved organics in floc, and increased particle load to the filters.

• 出版日期2011-11