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Multistage treatment of high strength dye wastewater by coagulation and ozonation

✍ Scribed by Yung-Chien Hsu; Chao-Hsi Yen; Hsing-Chao Huang

Publisher: Wiley (John Wiley & Sons)
Year: 1998
Tongue: English
Weight: 322 KB
Volume: 71
Category: Article
ISSN: 0268-2575
DOI: 10.1002/(sici)1097-4660(199801)71:1<71::aid-jctb808>3.0.co;2-k

No coin nor oath required. For personal study only.

✦ Synopsis

Two types of wastewaters from the dye manufacturing process were treated by multistage chemical coagulation combined with ozonation. By using the coagulant iron(II) chloride and a commercial coagulant aid, the majority of COD was removed in advance of ozonation, a similar repeated treatment cycle was performed after settlement of the coagulant in each cycle. Results showed that the optimum concentrations to be used were 2É5% (v/v) iron(II) chloride and 35 mg dm~3 coagulant aid. The decolorization efficiency was [99% and the COD elimination was [90%. The multistage combined chemical coagulation ozonation treatment was found to be superior to the single-stage treatment.

1998 SCI.

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