| Titre : |
Concentration and re-use of tannery dyeing-fatliquoring effluent by ultrafiltration |
| Type de document : |
texte imprimé |
| Auteurs : |
Hongru Wang, Auteur ; Wang Yong, Auteur ; Li Yongjian, Auteur ; Liu Xiaoxia, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 108-112 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bains de teinture -- Recyclage
Cuirs et peaux -- Teinture
Eaux usées -- Recyclage
Filtration
Membranes (technologie)
Polysulfones
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Spent dyeing-fatliquoring baths contain a large quantity of pollutants including polymers, dyestuffs, emulsified oils and additives. In order to reduce the pollution, the spent dyeing-fatliquoring bath was concentrated and re-used in the dyeing-fatliquoring process. The solutes in the bath were evaluated in terms of COD, total nitrogen, total solid, ash and dyestuff. The effects of the volume reduction factor on permeate flux and solute retentions were investigated during the concentration. The characteristics of concentrate and permeate, as well as membrane regeneration were measured during the re-use. The results show that a steady permeate flux of 41.9L/rn2h with retentions of above 91% of COD and above 95% of dyestuffs can be obtained at 25°C under a trans-membrane pressure of 0.09MPa when the volume reduction factor reached 2.0. At this volume reduction factor, ail the concentrate can be recycled in the dyeing-fatliquoring process, and ail of the permeate can be re-used in neutralizing process. No accumulation of solutes was found during the re-use of the concentrate stream. The concentration and re-use process has the good potential for industrial application. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Preparation of polysulfone UF membrane - Concentration of spent dyeing-fatliquoring baths - Membrana regeneration - Re-use of the permeate - Re-use of the concentrate - Measurement of spent dyeing-fatliquoring bath - Inspection fo the crust leather
- RESULTS AND DISCUSSION : Efficiency of concentration - Cleaning performance of membrane - Characteristics of concentrate and permeate in re-use - effect of the re-use on dyeing-fatliquoring |
| En ligne : |
https://drive.google.com/file/d/1oy0fvesqtKeotgTSBMBPGze0rG-cndzw/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21530 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 3 (05-06/2014) . - p. 108-112
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