Anti-shock loading capability of a fluidized-bed flocculator--颗粒学报PARTICUOLOGY

Zhou, D., Dong, S., Yang, Y., Zhao, W., & Gao, L. (2012). Anti-shock loading capability of a fluidized-bed flocculator. Particuology, 10(3), 276–282. https://doi.org/10.1016/j.partic.2011.07.002

Anti-shock loading capability of a fluidized-bed flocculator

Dandan Zhou ^a, Shuangshi Dong ^a *, Yang Yang ^b, Wenyuan Zhao ^a, Linlin Gao ^a

a Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China
b College of Environmental Science and Technology, Tongji University, Shanghai 200092, China

10.1016/j.partic.2011.07.002

Volume 10, Issue 3, June 2012, Pages 276-282

Received 4 March 2011, Revised 28 June 2011, Accepted 13 July 2011, Available online 29 November 2011.

E-mail: dongshuangshi@gmail.com

Highlights

Abstract

The efficiency of a fluidized-bed flocculator with 800-μm particles of 1360 kg/m3 in density was studied, and the anti-shock capability of the unit was estimated for three kinds of industrial wastewater: heavy turbidity wastewater, dispersed dyeing wastewater and starch wastewater. Steady removal efficiency was contributed by the following characteristics of the flocculator: (1) the dynamic conditions, flocculation time and velocity gradient, which were stabilized at a steady level as the loading rate changed; (2) hydrodynamic characteristics, especially the considerable rise of expanded bed height with increasing superficial velocity when small and light particles were employed as the solid phase; (3) flocs growth characteristics in the fluidized bed, which caused the density and size of the flocs being maintained at a compensational relationship, resulted the stabilized settling velocity of the flocs.

Graphical abstract

Keywords

Fluidized bed; Coagulation; Flocculation; Anti-shock capability

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