[article]
| Titre : |
Alternative treatments for footwear industry liquid effluents - Part 3 - Pressure wet hydrogen peroxide |
| Type de document : |
texte imprimé |
| Auteurs : |
M. J. Ferreira, Auteur ; M. F. Almeida, Auteur ; S. Pinho, Auteur ; A. Neves, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p.148-152 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Epuration
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Footwear industry finishing operations generate non-biodegradable liquid effluents having a high organic load, mainly due to dyes, organic acids and organic solvents. Coagulation/flocculation followed by carbon adsorption is one option for treating these effluents, since it may allow the discharge of the final effluent to sewage systems but not to water courses. The process is of dubious utility due to the sludge produced and the required adsorbent amount. Such limitations pushed the research towards wet oxidation (WO) already tested with oxygen as oxidant.
The reduction of effluent chemical oxygen demand (COD) with this treatment at 200 °C ranges from 50 - 80%, depending on the conditions and the initial COD of the wastewaters. However, residual COD values are too high for discharging the effluent to public sewage systems. Therefore, WO using hydrogen peroxide is the alternative method tested here.
The experiments carried out evaluated the influence of temperature, time, H2O2 dose and pH on the reduction of effluent chemical oxygen demand (COD) and other characteristics of the wastewaters. The catalytic effect of iron on the WO treatment efficiency was also evaluated. |
| Note de contenu : |
- Influence of H2O2 dose and pH
- Influence of time of the reaction
- Influence of temperature
- Influence of iron as catalyst
- Influence of filtration
- Table 1 : Influence of H2O2 dose in the COD, BOD5 and TOC at different pH
- Table 2 : Influence of time on the COD, BOD5 and TOC at 200 ̊C and pH2
- Table 3 : Influence of temperature on the COD, BOD5 and TOC at pH2 for 30 minutes
- Table 4 : Influence of iron on the COD, BOD5 and TOC at 150 ̊C, pH3 and 30 minutes
- Table 5 : Wet oxidation using H2O2 on non-filtered effluents of finishing footwear operations |
| En ligne : |
https://drive.google.com/file/d/1vg8J_9NzQGt6eXQSzQz89J4nHZ5E8NFK/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39904 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 4 (07-08/2002) . - p.148-152
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Alternative treatments for footwear industry liquid effluents - Part 3 - Pressure wet hydrogen peroxide in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 4 (07-08/2002)
