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Biological treatment of effluent containing textile dyes
Author(s) -
Gonçalves* I M C,
Gomes A,
Brás R,
Ferra M I A,
Amorim M T P,
Porter R S
Publication year - 2000
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2000.tb00016.x
Subject(s) - effluent , anaerobic exercise , pulp and paper industry , chemistry , textile , biomass (ecology) , biodegradation , organic matter , acid dye , environmental chemistry , environmental science , dyeing , materials science , organic chemistry , environmental engineering , ecology , biology , engineering , composite material , physiology
Colour removal of textile dyes from effluent was evaluated using a laboratory ‘upflow anaerobic sludge blanket’ reactor. Several commercial dyes were selected to study the effect of dye structure on colour removal. The anaerobic reactor was fed with glucose, an easily biodegradable organic matter and selected individual dyes. Results show that some of the dyes are readily reduced under anaerobic conditions even at a high concentration of 700 mg/l. The average removal efficiency for acid dyes using this method was between 80 and 90% and that observed for the direct dye used was 81%. Laboratory experiments using the anaerobic reactor with disperse dyes, such as an anthraquinonebased dye, were unsuccessful even at low concentrations of 35 mg/l. Additional experiments were conducted to evaluate the toxicity of a selected disperse dye to an anaerobic environment. Results indicate that the purified dye is more toxic to the biomass than the commercial one.