Biodegradation of leather solid waste and manipulation of methanogens and chromium-resistant microorganisms / Caroline Borges Agustini in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 1 (01/2017) . - p. 7-15 Titre : Biodegradation of leather solid waste and manipulation of methanogens and chromium-resistant microorganisms Type de document : texte imprimé Auteurs : Caroline Borges Agustini, Auteur ; Wolmir Lourenço Neto, Auteur ; Guilherme P. S. Priebe, Auteur ; Marisa Costa, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 7-15 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biogaz Cuirs et peaux -- Biodégradation Cuirs et peaux -- Déchets -- Recyclage Déchets -- Valorisation Déchets industriels -- Recyclage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The final solid wastes generated by tanneries are usually separately disposed of in hazardous industrial landfills, which are characterized as places of waste confinement where the residues undergo undesired and uncontrolled biological treatment. The storage and corresponding evolution of the sludge has not yet focalized the attention of the scientific community. Apart from developing knowledge of the ecology and function of the microbial community in anaerobic digestion processes, it is necessary to control this biological process. The manipulation of strict anaerobic microorganisms is the limiting factor in their isolation due to their high sensitivity to oxygen; therefore, cultivation under anaerobic conditions is essential. This work presents an evaluation of biogas generation and quality. In addition, microbial biodegradation is carried out in bench bioreactors containing two main solid wastes from tanneries: wet-blue shavings and sludge from a tannery wastewater treatment plant (WWTP). We analyzed two storage conditions of the sludge: storage under ambient conditions and under refrigeration. Sludge kept at ambient conditions showed a significantly higher methane production; methane was only detected in vials containing high concentrations of microorganisms. The manipulation of microorganisms did not interrupt biodegradation. The isolation technique with vials proved to be appropriate for the quantification of methanogenic microorganisms in biodegradation tests, although it was not fully elucidated for their isolation. Note de contenu : - MATERIALS AND METHODS : Bioreactor assembling - Biogas composition monitoring - Statistical analysis - Microbial collection and analysis - RESULTS AND DISCUSSION : Biogas and methane production - Statistical results - Microbiological results En ligne : https://drive.google.com/file/d/1sceXbIkeqzbHiY58k_0kIs9K846GK9kC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27564 [article]

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Gas chromatography as a tool for quality control in production of bovine tallow olein / Guilherme P. S. Priebe in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 4 (04/2012)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 4 (04/2012) . - p. 116-122 Titre : Gas chromatography as a tool for quality control in production of bovine tallow olein Type de document : texte imprimé Auteurs : Guilherme P. S. Priebe, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2012 Article en page(s) : p. 116-122 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras Chromatographie en phase gazeuse Esters méthyliques Suif Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This work presents the results of a Gas Chromatography methodology used to characterize and quantify the major fatty acids of bovine tallow. Tallow is a byproduct from processing waste meat in slaughterhouses and from tannery waste. Tallow has a high commercial value, especially when fractionated to olein that is predominantly composed of unsaturated fatty acids. Olein is used as a raw material for the production of leather fatliquoring emulsions or biodiesel production. The fatty acids of tallow and its products of fractionation were first converted to methyl esters, and these esters were then analyzed by Gas Chromatography. The results showed the major fatty acids and their weight distribution. This analytical methodology will allow a quality assessment of tallow by the end user industry. It is also a reliable quantitative tool to evaluate the efficiency and optimization of the tallow fractionation processes. Note de contenu : - INTRODUCTION : Bovine tallow and its fractionation - Gas chromatography - MATERIAL AND METHODS : Tallow samples and olein - Samples preparation - Esterification methodology - Fatty acids identification by GC-MS - Mass fractions of fatty acids - RESULTS AND DISCUSSION : Tallow and olein characterization - Fatty acids identification by GC-MS - Results of fatty profile analysis En ligne : https://drive.google.com/file/d/1v9GEwEZRyeQU0NEV8nZW9ul9E-1p-ATo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14685 [article]

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Special review : anaerobic digestion of leather industry wastes - An alternate source of energy / Guilherme P. S. Priebe in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 2 (02/2017)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 2 (02/2017) . - p. 59-72 Titre : Special review : anaerobic digestion of leather industry wastes - An alternate source of energy Type de document : texte imprimé Auteurs : Guilherme P. S. Priebe, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 59-72 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biogaz Cuirs et peaux -- Déchets -- Recyclage Energie -- Récupération Energie de la biomasse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Advances in environmental protection legislation, along with the awareness of societies, leads industrialists, environmentalists and scientists, to search for production methods or industrial processes with lower environmental impacts. Within this philosophy, the maximum utilization of raw materials, wastes and by-products should be considered as a target for the leather industry. The anaerobic digestion of solid leather wastes may represent a possibility for energy recovery through biogas production. This gaseous fuel (biogas) is considered a renewable and carbon-free since the basic raw material is classified as biomass. This paper presents the potential for energy recovery through anaerobic digestion of different tannery wastes, tanned and untanned, based on the potential for biogas generation available in scientific literature using recent publications. The results show that collagenous materials can be efficiently degraded biologically to obtain a gas with high calorific value in sufficient quantities to supplement the energy demand of tanneries as a complementary source. The average heating values (Higher Heating Value, HHV) of biogas obtained under controlled conditions was found to be between 13.1 and 29.4 MJ.Nm-3 allowing an estimated energy potential of around 123 to 485 kWh per metric ton of rawhide processed. Considering the tannery energy consumption, the biogas may represent from 0.9 to 15% of the total energy demand or from 6 to 31% of the electrical demand. This initiative aims to increase the energy efficiency and improve the environmental quality of the tanning industry. Note de contenu : - INTRODUCTION : Critical parameters for biogas production - Anaerobic digestion redisues (digestate - Biogas utilization - METHODOLOGY : Solid waste generation - Biogas production - Biogas heating value - Energy potential - RESULTS AND DISCUSSION : Solid wastes inventory - Biogas generation - Energy potential En ligne : https://drive.google.com/file/d/1n1yzWh8W4SEnnvXYyT0kus8s9ruSzJdm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27886 [article]

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