期刊
DESALINATION
卷 147, 期 1-3, 页码 95-100出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0011-9164(02)00582-9
关键词
water treatment; fouling; hybrid process; coagulation; ultrafiltration
An in-line coagulation (without settling)/UF process has been studied to improve membrane performance and water quality for surface water treatment, Using coagulation before UF increases permeate quality; the extent of dissolved organic matter removal is controlled by the coagulation step. Efficient coagulation conditions for a coagulation/settling process can be applied for the in-line coagulation/UF process and membrane fouling is reduced. Floc cake resistance is lower than resistance due to the unsettled floc and the uncoagulated organics. For an inside-out hollow-fiber system, the impact of coagulation dose depends on filtration mode: for instance, in cross-flow with A feed-and-bleed configuration, a reduction of coagulant dose induces an increase of the mass transfer resistance even in quasi stable hydrodynamic operating conditions.
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