[article]
| Titre : |
The elimination of effluent from liming, acid/salt pickling and the chromium tanning processes |
| Type de document : |
texte imprimé |
| Auteurs : |
Richard Daniels, Auteur ; Jiasheng Su, Auteur ; Falei Zhang, Auteur ; Zhuangdou Zhang, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 105-111 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chaulage
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Déchets -- Réduction
Déchets industriels -- Elimination
Eau -- Consommation -- Réduction
Eaux usées -- Epuration
PicklageLe picklage consiste à faire absorber à la peau en tripe une quantité importante d'acide, en présence de sel neutre (NaCl) pour réprimer le gonflement que provoquerait l'acidité du milieu.
Produits chimiques -- Consommation -- Réduction
Tannage
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
It is acknowledged that within the chemical processing of hides into chrome-tanned leather that the liming, acid pickle and the tanning processes are the major contributors of pollutants. This is in terms of biological load, suspended solids, sulfide, nitrogen, chromium, salinity and the resultant sludges for disposal.
This loading includes unused chemicals that are discharged from these processes due to the poor process efficiencies. Many attempts have been made to lessen this waste at source, but technologies in common use have basically remained unchanged for decades.
Solutions to these problems are for reaching, and the details set down in this paper describe a technology that addresses and resolves these matters. This information was compiled through independent on-site studies within three major tanneries, where approximately 60 000 wet-salted US, European and. Australien hides per week have been processed since 2013. Accordingly, this paper describes in detail this radical new approach to leather manufacture.
The initial investigations and developments of this technology by BIOSK involved the building of a full scale wet-blue manufacturing plant, and five years of developments before introduction to industry. The practicality and value of this technology has since been verified by continuous full scale manufacture by tanners that commenced in 2011.
The technology involves the complete retention and recycling of used floats from liming, pickle and tanning in self-contained loops, and eliminates associated washing cycles. This is the base for the complete uptake of processing chemicals, a significant reduction in water use, and zero effluent discharged from these ordinal rnanufacturing stages. |
| Note de contenu : |
- METHODOLOGY : The technology for wet-blue manufacture from wet-salted hides
- RESULTS AND DISCUSSION : Managing the technology - Managing the salinity within processing - Technical advantages
- FIGURES : 1. The BIOSK development plant. Collection sumps for holding the various waste water discharges from wet-blue manufacture are shown in the foreground. In tanneries using the technology, floor-mounted holding tanks are used instead of sumps - 2. Swelling of a skin as a function of pH and repression by addition of salt
- TABLES : 1. Tanneries as sources of information - 2. Hair-saving liming process : BIO-cycle technology. Material : wet-salted boving hides : USA, Australia, Europe - 3. Pickle, pre-annage and chromium tannage : BIO-cycle technology. Material : wet-salted bovine hides : USA, Australia, Europe - 4. Reductions in offers of chemicals and water (spreas of values from three tanneries) - Reductions in chemicals and water based on previous (conventional) processing (spread of values from three tanneries) |
| En ligne : |
https://drive.google.com/file/d/1ZOQDWfbiT7QpAHyBGPtqoR7eSE_B4igs/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28794 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 105-111
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The elimination of effluent from liming, acid/salt pickling and the chromium tanning processes in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)
