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Anaerobic digestion of animal glue industry solid wastes / S. Pulavendran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
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Titre : Anaerobic digestion of animal glue industry solid wastes Type de document : texte imprimé Auteurs : S. Pulavendran, Auteur ; R. Ganesh, Auteur ; A. Thangamani, Auteur ; K. Thirumaran, Auteur ; R. A. Ramanujam, Auteur Année de publication : 2005 Article en page(s) : p. 67-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésifs d'origines animales
Bio-méthanisation
Biogaz
Déchets industriels -- Recyclage
Déchets organiques -- Recyclage
Digestion anaérobieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Anaerobic digestion of animal glue industry solid wastes (AGISW) (residues from neutralised fleshings after glue extraction) was studied in a semi-continuous bench scale digester in order to determine the extent of the conversion into biogas. The Carbon/Nitrogen (C/N) ratio of AGISW is nearly 6.0. Solid wastes and wastewater from a local glue manufacturer were used as substrate for the anaerobic digestion. The study used a bench scale digester with a working volume of 6.5 litres operating at ambient temperature (28 ± 2°C). A hydraulic retention time (HRT) of 40 days and an Organic Loading Rate (OLR) of 3 ± 0.2 g /l. d were maintained during the study period. The study showed that 65 % of the volatile solids was destroyed. The average specific gas productions were 0.28 l /g of volatile solid added and 0.48 l/g of volatile solid removed. (Volatile solids are determined by ignition at 550°C and are a measure of the organic matter present in the waste - mainly denatured lipids and proteins).
The values of specific gas production and percentage Volatile Solids (VS) destruction are in agreement with those for industrial and agro industrial wastes reported in the literature. The results revealed an interesting fact that, anaerobic digestion of AGISW could be operated at high Volatile Fatty Acids (VFA) concentration without affecting gas production.
Anaerobic digestion of AGISW was studied for the first time with a view to managing solid wastes in an ecofriendly manner. The authors are of the view that this maiden attempt would help the industry manufacturing animal glue to use biogas from its waste resource as fuel.Note de contenu : - Feed preparation
- Experimental set-up
- Digester start-up and operation
- Analytical techniques
- Table 1 : Parameters of the waste characteristics before and after anaerobic digestionEn ligne : https://drive.google.com/file/d/1G5zrUHWHz-UPljLvB1vhNFcW3jqzNt4C/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39596
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 2 (03-04/2005) . - p. 67-70[article]Biokinetics and toxicity assessment of tannery wastewater using batch reactor system / R. A. Ramanujam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 11 (11/2004)
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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 : 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[article]Réservation
Réserver ce documentStudies on treatment of tannery wastewater using a sequencing batch reactor / M. Dinesh Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 9 (09/2004)
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Titre : Studies on treatment of tannery wastewater using a sequencing batch reactor Type de document : texte imprimé Auteurs : M. Dinesh Kumar, Auteur ; R. Manoj Kumar, Auteur ; R. Ganesh, Auteur ; R. A. Ramanujam, Auteur Année de publication : 2004 Article en page(s) : p. 361-366 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Sequencing Batch Reactor (SBR) technology was studied to optimize various process control parameters for effective removal of Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) from tannery wastewater. Laboratory scale aerobic SBRs fed with primary treated tannery wastewater were operated at 8, 10 and 12 hour time cycles to study the removal efficiencies of BOD and COD with a view to select a time cycle where maximum removal efficiency was possible. Organic Loading Rate (OLR) was found to be a vital factor in the treatment of tannery wastewater by SBR technology. SBR technology with a 10-hour time cycle and an organic loading rate of 0.21 - 0.24 kg/m3.day was found to be optimum. The BOD and COD removal efficiencies were 85 - 93% and 70 - 75% respectively for 10 hour SBR operation cycle. Other process parameters like Food to Microorganism (F/M), Volumetric Exchange Ratio (VER) and Fill Time Ratio (FTR) were also optimised for the 10-hour time cycle. This research has confirmed the suitability of SBR technology especially for the treatment of wastewater from small-scale tanneries where the wastewater generation is intermittent and the characteristics are fluctuating depending upon the tanning process. En ligne : https://drive.google.com/file/d/1HP9AkYqIUq4Fh82L5Hd6bx3ybWAyq8J1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4218
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 9 (09/2004) . - p. 361-366[article]Réservation
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