Downstream dyeing facilities, a noticeable amount of dyes may remain in the wastewater giving anaesthetic colouration. Conventional biological treatment alone cannot guarantee decolouration and tertiary treatments have to be considered: two oxidation routes by ozone were considered in this work. A bubble column reactor (benchmark, also at industrial scale) and a recycle well-mixed reactor were compared to reach a complete decolouration. In addition, hydrodynamic and ultrasonic cavitation were considered in the recycled well-mixed reactor to intensify its performance. Ozone treatment was protracted to obtain different decolouration degrees on wastewater from wool dyeing. The resulting water was tested as recycled fluid to generate dyeing liquors, the definition of minimal quality specification being the goal of this procedure.

DEGRADATION OF RESIDUAL DYES IN TEXTILE WASTEWATER BY OZONE: EFFECT OF HYDRODYNAMICS AND CAVITATION / ACTIS GRANDE, Giuseppe; Rovero, Giorgio; Sicardi, Silvio. - unico:(2015). (Intervento presentato al convegno AUTEX 2015, 15th World Textile Conference tenutosi a Bucharest, Romania nel June 10-12, 2015).

DEGRADATION OF RESIDUAL DYES IN TEXTILE WASTEWATER BY OZONE: EFFECT OF HYDRODYNAMICS AND CAVITATION

ACTIS GRANDE, GIUSEPPE;ROVERO, Giorgio;SICARDI, SILVIO
2015

Abstract

Downstream dyeing facilities, a noticeable amount of dyes may remain in the wastewater giving anaesthetic colouration. Conventional biological treatment alone cannot guarantee decolouration and tertiary treatments have to be considered: two oxidation routes by ozone were considered in this work. A bubble column reactor (benchmark, also at industrial scale) and a recycle well-mixed reactor were compared to reach a complete decolouration. In addition, hydrodynamic and ultrasonic cavitation were considered in the recycled well-mixed reactor to intensify its performance. Ozone treatment was protracted to obtain different decolouration degrees on wastewater from wool dyeing. The resulting water was tested as recycled fluid to generate dyeing liquors, the definition of minimal quality specification being the goal of this procedure.
2015
9786066852760
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2611960
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo