Evaluation of Flocs Size inside the Blanket Clarifier

Abstract:

Flocs size is an important parameter in the blanket clarifier process, hence, it is necessary to investigate flocs average diameter in different blanket height to achieve optimum operation parameters of the process. To investigate the flocs size under different operational conditions，flocs were sampled from different locations of the blanket in various operating stages to analyze its size. Experimental works with water plant wastes flocculated with polyacrylamide (PAM) suspended in a pilot-scale blanket confirmed the theoretical predictions. Change in operational conditions such as raw water concentration and up-flow rate would affect the blanket flocs size, there exists a linear relationship between up-flow rate and flocs average size, and flocs size were improved along with the increase of raw sludge concentration. The experimental results identified an inverse proportion between flocs average size and the blanket depth, the average flocs diameter increased along with the depth of the blanket.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 3687-3690
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.3687
• Online since: May 2012
• Authors: Li Qing Zhang, Gang Zhang
• Keywords: Blanket, Flocculation, Operational Conditions, Raw Sludge Concentration, Up-Flow Rate

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