21.
Polyaluminium chloride as a coagulant and polyacrylamide seed gum,
as a coagulant aid
Pre-hydrolysed
salts + natural polymer
Reactive, acid and direct
Removal efficiency is improved
Sanghi et al.
(2006)
22.
Alum as coagulant and commercial
cationic
flocculant as coagulant aid
Chemical metallic
coagulant + synthetic
polymer
Reactive black 5 and acid
dye
Combination yield effective for
residual dye bath wastewaters.
Golob et al.
(2005)
TOC, COD, AOX, BOD and
anionic surfactants were reduced
and biodegradability increases
23.
Ferric chloride
Chemical metallic
coagulant
Reactive and disperse dye
–
Kim et al.
(2004)
24.
Ferrous sulphate as coagulant and
lime and cationic polymer as coagulant aid
Chemical metallic
coagulant + polymer
Reactive dye
–
Georgiou
et al. (2003)
25.
Cyanoguanidine, polyamine and
polydiallyldimethylammonium chloride (polyDADMAC)
Inorganic salt + an
organic polymer
Levafix brilliant red
For reactive dye coagulation, only
cyanoguanidine polymer was appropriate but has an intense pungent
smell and is not economical at large
scale
Carvalho
et al. (2002)
ERN
13 Role of Coagulation/Flocculation Technology for the Treatment of Dye. . .
317