Fundamentals of particle flocculation and removal from water
- Univ. of Cincinnati, OH (United States). Dept. of Chemical Engineering
The removal of pollutants during drinking and waste water treatment as well as during the recovery of the products of precipitation, crystallization, and polymerization processes requires that solid particles be separated from a suspension. The flocculation of polystyrene particles with aluminum sulfate or alum (Al{sub 2}(SO{sub 4}){sub 3}) by turbulent shear was studied as a function of the applied shear rates (63--129 s{sup {minus}1}) and flocculant concentrations (11 and 32 mg/L) in a stirred tank. Increasing the shear rate increased the floc growth rate but decreased the maximum attainable floc size. Increasing the concentration of alum increased the floc growth rate and the maximum floc size. A steady state between floc growth and breakage was attained after which the floc size distribution no longer changed. The normalized steady state size distributions allowed evaluation of the relative contributions of shear rate and flocculant concentration to the performance of the process.
- OSTI ID:
- 106189
- Report Number(s):
- CONF-940411-; ISBN 1-55899-239-1; TRN: IM9542%%277
- Resource Relation:
- Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 4-8 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Materials and processes for environmental protection; Voss, K.E.; Quick, L.M. [eds.] [Englehard Corp., Iselin, NJ (United States)]; Gadgil, P.N. [ed.] [Queens Univ., Kingston, Ontario (Canada)]; Adkins, C.L.J. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; PB: 356 p.; Materials Research Society symposium proceedings, Volume 344
- Country of Publication:
- United States
- Language:
- English
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