[article]
| Titre : |
The biodegradability of tannery chemicals |
| Type de document : |
texte imprimé |
| Auteurs : |
D. R. Corning, Auteur |
| Année de publication : |
1978 |
| Article en page(s) : |
p. 63-67 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chimie analytique
Produits chimiques -- Biodégradation
Tannage
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Public sewage treatment authorities are often bath to accept tannery effluents because they are apprehensive either about the effects of specific components, e.g. heavy metals and sulphides on their processes, or of the high COD to BOD ratios which have been cited as indicating non-biodegradability. Real resistance to treatability is even more relevant to onsite biological treatment by the tannery.
The work described below was undertaken to investigate both of these aspects. Laboratory trials were carried out, using various techniques, to examine the inherent treatability of a number of tanning materials, dyestuffs and other chemicals widely used in tannery processes. Later, one of the techniques was employed in a study of the treatment of a mixed effluent, the work subsequently being extended to pilot plant operation in a tannery. |
| Note de contenu : |
- EXPERIMENTAL TECHNIQUES : Laboratory scale activated sludge plants (ASP) - Respirometry
- FINDINGS : Tanning agents - Biocides - Dyestuffs
- Fig. 1 : Laboratory ASP
- Fig. 2 : Respirometer cell
- Fig. 3 : Respirometer trials, typical growth curve
- Fig. 4 : COD changes, tan/sewage mixture in ASP
- Fig. 5 : BOD changes, tan/sewage mixtures in ASP
- Fig. 6 : Laboratory ASP trials, treatment of sewage/tannery effluent mixtures
- Fig. 6a : Effect of phosphate addition on removal efficiency
- Fig. 7 : Pilot scale ASP : general arrangement
- Table 1 : Respirometer trials, replacing standard nutrients with tans to maintain constant initial COD levels
- Table 2 : Addition of biocides to "standard" respirometer eco-systems
- Table 3 : Reduction of oxygen demands in ASP dyes (0.01 %) in domestic sewage |
| En ligne : |
https://drive.google.com/file/d/15D7ZWgPlD6TJTlQc5pojaSGtrXirn8eh/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40489 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 62, N° 3 (05-06/1978) . - p. 63-67
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The biodegradability of tannery chemicals in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 3 (05-06/1978)
