[article]
Titre : |
A modified leather processing method for water and pollution reduction in tannery |
Type de document : |
texte imprimé |
Auteurs : |
Subramani Saravanabhavan, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balachandran Unni Nair, Auteur |
Année de publication : |
2008 |
Article en page(s) : |
p. 24 - 35 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Current practice of leather manufacture subjects the hides/skins to repeated acid and alkali treatments. Conventional process protocol results in high total dissolved solid (TDS) and chemical oxygen demand (COD) in the wastewater. Further, the process employs huge amount of water and subsequently discharges the same as wastewater. The cost for the treatment of wastewater is directly proportional to the volume of wastewater generated. In this study, the leather processing sequence has been modified for water and pollution reductions as well as better quality leather production. The modified process treats the delimed pelt with post-tanning chemicals first followed by chrome tanning salt. This is possible due to appropriate choice of charge of the hide matrix and post tanning chemicals and pH profiles of leather processing. This process logic eventually eliminates several acid and alkali treatment and washing steps that are followed in the conventional process. The percentage offer of post tanning chemicals is determined based on pelt weight to split weight relation. The leather from modified process is characterized through stratigraphic distribution of chromium, percentage oils and fats, scanning electron microscopy, softness and physical testing. The performance of the leathers is found to be on par with that of conventionally processed leathers through hand and physical evaluation. The modified process significantly reduces the usage and discharge of water by 62 and 62%, respectively. It also enjoys the reduction in COD and (TDS) loads by 49 and 70%, respectively. Further, the process reduces the usage of chemicals by 41% by avoiding acid and alkali treatment steps. The modified process appears to be technically feasible and economically viable. |
En ligne : |
https://drive.google.com/file/d/1kmj6fm56TX5aO45s3Io7On2E-x1Gm_je/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2582 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 1 (01/2008) . - p. 24 - 35
[article]
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