| Titre : |
Biokinetics and toxicity assessment of tannery wastewater using batch reactor system |
| Type de document : |
texte imprimé |
| Auteurs : |
R. A. Ramanujam, Auteur ; M. Mariappan, Auteur ; R. Ganesh, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 468-473 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The design of an activated sludge process involves the establishment of fundamental reaction kinetics using batch laboratory scale biological oxidation system and integration of the batch kinetics with mixing theory to predict the performance of a continuous process. Batch tests can be used successfully for the determination of kinetic parameters and toxicity of wastewater. The results obtained in the present study show that pre-treated tannery wastewater is not toxic to microorganisms. The design criteria evolved using the batch study were loading rate (0.09 BOD/mixed liquor volatile suspended solids) and hydraulic retention time (> 24 hours) for meeting the effluent BOD standard. These design values suggest that the extended aeration system is the most appropriate activated sludge treatment method for tannery wastewater. The half-velocity constant (Ks) evaluated was in the range 245 - 312 mg/l on BOD basis and 963-1138 mg/l on COD basis. Ks defines the substrate uptake characteristics. The relatively higher value of Ks for tannery wastewater compared to domestic wastewater indicates that substrate removal is slower and hence longer retention time is required for complete biodegradation of tannery wastewater. The regression analysis of the batch experimental data in a coordinate system InS/S0 versus tXa for the determination of specific rate constant (KE) resulted in a satisfactory correlation coefficient (r = 0.99). Estimating biokinetic constants for tannery wastewater according to a first order reaction using a batch reactor was satisfactory. |
| En ligne : |
https://drive.google.com/file/d/1C5W1BViAnwLOmqlhkN3ZPshOt1UhfbIB/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4236 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 11 (11/2004) . - p. 468-473
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Biokinetics and toxicity assessment of tannery wastewater using batch reactor system in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 11 (11/2004)
