| Titre : |
A pilot plant study of the effects of quebracho and wattle on anaerobic digestion |
| Type de document : |
texte imprimé |
| Auteurs : |
J. David Eye, Auteur ; Charles F. Ficker, Auteur |
| Année de publication : |
1982 |
| Article en page(s) : |
p. 137-148 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Anaerobing digestion has been used extensively fot the biological stabilization of hight-strengh organic wastes and sludges. In a properly operating anaerobic system, methane gas which has considerable fuel value is produced as the organics are decomposed. The anaerobic process occurs in three simultaneous reaction steps :
- 1) The complex organics are hydrolyzed to simpler compounds
- 2) These compounds are then converted to a variety of organic acids and carbon dioxide by "acid" forming bacteria
- 3) The organic acids from the second reaction are converted to methane gas by the methane-producing bacteria.
The methane producers are extremely sensitive and require a carefully-controled environment. Since tannins have been shown to be toxic to selected strains of bacteria, this study was conducted to determine if quebracho and watlle would inhibit the anaerobic digestion process.
The results of the study showed that both quebracho and wattle tannin adversely affected the operational controle required for the systems as well as methane production. The anaerobic organisms however were able to degrade the tannins so that the characteristic red color was effectively removed from the supernatant (liquid phase of digested sludge) during digestion. |
| Note de contenu : |
- EChemical oxygen demand (C.O.D.)
- Volatile suspended solids (V.S.S.)
- Volatile acids (V.A.)
- Gas volume and composition
- Tannin mass balance |
| En ligne : |
https://drive.google.com/file/d/1wVb27Um7ikYkeAQscQFxyCACCw7AlOAC/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17434 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XXVII (Année 1982) . - p. 137-148
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