| Titre : |
Lack of inhibitory effect of chromium on anaerobic co-digestion of tannery solid wastes |
| Type de document : |
texte imprimé |
| Auteurs : |
Caroline Borges Agustini, Auteur ; Amanda L. Jasper, Auteur ; Marisa Costa, Auteur ; Mariliz Gutterres, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 303-307 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Biogaz
Boues d'épuration -- Recyclage
Déchets industriels -- Recyclage
Digestion anaérobie
Recyclage (déchets, etc.)
Tannage -- Déchets
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Large amounts of shavings and sludge are generated from wastewater treatment plants of tanneries and are of great concern since their must common destination is their disposal in landfills. ln tanning processes chromium salts are the main tanning agents used. The tannery solid residues characteristics suggest that anaerobic digestion is a potential treatment alternative. Therefore this study aimed to analyze the influence of the presence of chromium in the co-digestion of these two leather industry solid residues of major concern both before and after the tanning stage. The presence of chromium in sludge proved to be more suitable than its absence, producing more biogas — 30.34mI/g of VSS (volatile suspended solids) on average — and a greater reduction of organic load 67.7% on average. This may be due to the low concentration of chromium in essays (up to 15mg/L.) being appropriate for rnany enzymes and co-enzymes in addition to the possible toxicity of the reagents used in the beamhouse process, such as acids and bases, which inhibited the final steps of the anaerobic digestion. The presence of chromium in shavings did not show significant influence probably due to their small proportion in essays. |
| Note de contenu : |
- Table 1. Essays of 22 factorial design performed in duplicate
- Table 2. Chromium concentration in wastes. Waste chromium concentration
- Table 3. Final methane percentage by biodigestion essays
- Fig. 1 Concentration of chromium in essays before and after biodegradation
- Fig. 2. Biogas cumulative generation in the biodegradation essays of mixtures of the tannery wastes : sludge and shavings
- Fig. 3. Biological oxygen demand in essays before and after biodegradation |
| En ligne : |
https://drive.google.com/file/d/19QwjKz4SxPiODVJZesv2Pb8CKONqilE6/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29669 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 6 (11-12/2017) . - p. 303-307
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Lack of inhibitory effect of chromium on anaerobic co-digestion of tannery solid wastes in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 6 (11-12/2017)
