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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Recovery of industrially useful hair and fat from enzymatic unhairing of goatskins during leather processing / Joseph Ondari Nyakundi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 6 (06/2022)
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Titre : Recovery of industrially useful hair and fat from enzymatic unhairing of goatskins during leather processing Type de document : texte imprimé Auteurs : Joseph Ondari Nyakundi, Auteur ; Jackson Nyarongi Ombui, Auteur ; Wycliffe Chisutia Wanyonyi, Auteur ; Francis Jakim Mulaa, Auteur Année de publication : 2022 Article en page(s) : p. 241-250 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Cuirs et peaux de chèvres
Epilage enzymatique
Essais (technologie)
Evaluation
Huiles et graisses -- Recyclage
Huiles et graisses animales
Poils -- Recyclage
Qualité -- Contrôle
Récupération (Déchets, etc.)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather processing not only serves social needs by putting into use the meat industry’s by-products (hides and skins) but also makes a significant contribution to global economic growth through trade and job creation. In the wake of globalization, however, leather manufacturers are facing new challenges in meeting environmental imperatives and improving the utilization of wastes generated during leather processing. This study describes the recovery of hair and fat
from fleshings obtained after enzymatic unhairing of goatskins using a protease from an isolate of Bacillus cereus Strain 1-p. The recovered hair and fats were further characterized to facilitate recommendations for different industrial applications. The following hair properties were visually examined and evaluated by hand ; straight length, density and uniformity, hair strength and overall quality. The fats were analyzed by characterizing the fatty acid composition using the Gas Chromatography-Mass Spectrometry (GC-MS analysis). The recovered hair was intact and rated to be of average to good quality. The fat characterization indicated that methyl 9Z-octadecenoate (9Z-heptadecenoic acid; oleic acid) was the most abundant fatty acid with an abundance of 31.65%. The sulfide-free fats and intact hair, therefore, were recommended for use in various industrial applications such as manufacturing of poultry feedstuff, organic fertilizers, biodiesel and biofuels, fatliquoring agents, soaps and cosmetics after further purification where necessary. The hair and fats recovered from this study are particularly advantageous over those recovered from sulfide unhairing systems as they are free from any sulfides or lime contamination thus easier to purify and use. The study concluded that the use of the enzyme extract from Bacillus cereus Strain 1-p to unhair goatskins facilitated the recovery of valuable hair and fats that can be used for other industrial applications.Note de contenu : - MATERIALS AND METHODS : Materials - Methods (Enzyme preparation - Unhairing of goatskins) - Characterization of the recovered products
- RESULTS AND DISCUSSION : Recovered hair analysis - Recovered fat analysis
- Table 1 : Assesment of recovered hair quality
- Table 2 : Fatty acids test resultsDOI : https://doi.org/10.34314/jalca.v117i6.4965 En ligne : https://drive.google.com/file/d/13xpAHCyMlTJBIwqMWXKZCUw9d_FUgOJp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37799
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 6 (06/2022) . - p. 241-250[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23490 - Périodique Bibliothèque principale Documentaires Disponible Recovery of organic nitrogen from beamhouse wastewater in a hair recovery process / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)
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Titre : Recovery of organic nitrogen from beamhouse wastewater in a hair recovery process Type de document : texte imprimé Auteurs : Agusti Marsal, Auteur ; Joaquim Font, Auteur ; A. Rius, Auteur ; M. Reyes, Auteur ; Sara Cuadros, Auteur ; E. Bautista, Auteur Année de publication : 2009 Article en page(s) : p. 176-182 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the leather industry, in addition to the extrinsic contamination attribuable to chemical products not absorbed by the hides, there is intrinsic contamination produced by the hides themselves. from each 100 kgs of raw material, 15 kgs of solubilised protein will end up in wastewater in the early stages of the process of transforming hides into leather. These proteins contain nearly 18% of nitrogen. In this study it is proposed to recover organic nitrogen from the proteins present in the effluents of the beamhouse operations of hides and the subsequent revalorization of the protein fraction obtained.
This work seeks to characterize (the chemical oxigen demand (COD), total nitrogen, ammonium nitrogen, total soluble nitrogen, particulate nitrogen, organic nitrogen and protein) the wastewaters, individually or in groups, of the various beamhouse operations (soaking, unhairing-liming, washing, conditioning, deliming, bating, washing and pickling) with hair recovery.
The studies are presented of the determination of the pH value (adjusted by means of buffers of acetic acid/sodium acetate) at which the greatest precipitate of the protein fraction if produced. In addition, the following tests were performed to characterize these precipitates : determination of the quantitative composition of the main components of the protein fraction (humidity, proteins, free amino acids, fats and other matter soluble in dichloromethane and ash) ; heavy metals content, calcium, magnesium, potassium and sodium and the composition in total amino acids with prior acid hydrolysis of the protein fraction with 6N hydrochloric acid.En ligne : https://drive.google.com/file/d/15jtZl0drv7WDsFm3P8MYIps2ch5NYQcV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6276
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 5 (09-10/2009) . - p. 176-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011654 - Périodique Bibliothèque principale Documentaires Disponible Recovery, purification and reuse of contaminated sodium chloride obtained from tanneries for raw goat skin preservation / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 2 (02/2016)
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Titre : Recovery, purification and reuse of contaminated sodium chloride obtained from tanneries for raw goat skin preservation Type de document : texte imprimé Auteurs : N. Vedaraman, Auteur ; K. V. Sandhya, Auteur ; V. Brindha, Auteur ; A. Tamil Selvi, Auteur ; K. C. Velappan, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2016 Article en page(s) : p. 62-68 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de sodium -- Recyclage
Cuirs et peaux -- Analyse
Cuirs et peaux -- Conservation
Produits chimiques -- Purification
Récupération (Déchets, etc.)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Large quantity of sodium chloride is used for raw skin preservation. Significant amount of salt is removed from raw skin through a mechanical process before taking for further processing in tanneries. This recovered salt is contaminated with various dirt, proteinous materials and microorganisms and gets accumulated, which creates a serious waste disposal problem for tanneries. In this study the recovered contaminated waste salt was purified and reused for skin preservation. The recovered contaminated salt from tannery was dissolved in water, filtered, treated with activated charcoal to remove the undesired components and subjected to ozone treatment for the removal of microbial contamination. The ozonized solution was subjected to solar evaporation. Improved evaporation techniques were employed to facilitate evaporation of salt solution. Dried purified salt obtained was checked for microbial contamination. Then the dry salt was used for the preservation of a fresh batch of animal skin. After a minimum storage period of 21 days, the skins were processed into leather as per the usual procedure and compared with the leathers obtained by conventional fresh salt preserved skins. The physical tests, chemical analysis and organoletic properties of experimental leathers show that the quality of leather obtained from animal skins preserved using purified salt was comparable to leathers obtained from conventional pure salt preserved skins. The approach minimizes salinity concerns of tanning by providing simple and practical solution. Note de contenu : - Materials and methods
- Determination of moisture content in salt
- Preparation of salt solution
- Filtration
- Activated charcoal treatment
- Ozonation
- Evaporation
- Studies on microbial load in contaminated and purified salt
- Total bacterial load
- Total fungal load
- Preservation trials
- Strength tests and chemical analysis of leathers
- Organoleptic properties of leathersEn ligne : https://drive.google.com/file/d/1ZQGUqOkEWgBypq2Mb-q5rpodNQXqRybz/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25427
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 2 (02/2016) . - p. 62-68[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17831 - Périodique Bibliothèque principale Documentaires Disponible Recycl Leather ou l'avènement d'une matière issue de chutes de cuirs / Juliette Sebille in LEATHER FASHION DESIGN (LFD), N° 1 (02/2019)
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Titre : Recycl Leather ou l'avènement d'une matière issue de chutes de cuirs Type de document : texte imprimé Auteurs : Juliette Sebille, Auteur ; Corinne Jamet, Photographe Année de publication : 2019 Article en page(s) : p. 70-71 Langues : Français (fre) Catégories : Cuir -- Déchets
Déchets -- Valorisation
Maroquinerie
Récupération (Déchets, etc.)
Recyclage (déchets, etc.)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : D’un côté, Olivier Grammont, consultant développement dans le secteur de la maroquinerie. De l’autre, Aron Yu, officiant dans le domaine de l’imprimerie de luxe. Quand les deux hommes se rencontrent, en résulte une start-up alliant cuir, dextérité et durabilité.
Le concept, Recyc Leather, est né et se décline en trois volets : développement matière, développement produit et une nouvelle ligne de maroquinerie sino-française !Note de contenu : - Un service de développement matière valorisant les chutes de cuir
- Un service de développement produit et une nouvelle marque de petite maroquinerieEn ligne : https://leatherfashiondesign.fr/recyc-leather-upcycling-cuir/ Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32752
in LEATHER FASHION DESIGN (LFD) > N° 1 (02/2019) . - p. 70-71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21039 - Périodique Bibliothèque principale Documentaires Disponible Recycling in goat skin lime unhairing / A. Crispim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 2 (03-04/2011)
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Titre : Recycling in goat skin lime unhairing Type de document : texte imprimé Auteurs : A. Crispim, Auteur ; A. Sampaio, Auteur ; N. S. Caetano, Auteur Année de publication : 2011 Article en page(s) : p. 59-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bain de trempe
Centrifugation
Chaulage
Cuirs et peaux de chèvres
Eau -- Consommation -- Réduction
Eaux usées
FiltrationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The environment is a factor of concern in our lives that forces society to search for an implement technologies that enable cleaner processes in industry. The leather industry is known to be a polluting activity that needs large amounts of water and at the same lime, produces a large flow of alkaline effluents rich in sulphide. The work in this study aims to minimize water and chemical consumption by recycing the liming bath used in goat skin unhairing.
Two systems were tested for recycing of the liming bath from a hair-burning process (centrifugation and ultrafiltration) but for recycling the liming bath from a hair-saving process the only system tested was ultrafiltration. These recycling systems provided a good reduction in COD with better results when ultrafiltration was applied.
The chemical reduction were 33 % of sodium sulphide. 40 % of anti-wrinkle and sodium sulphydrate and 25 % lime for the hair-burning liming process with recycling. The chemical reductions were 32 % and 25 % lime with an additional consumption of enzyme sodium sulpide, 25 % sodium sulphydrate and 25 % lime, with an aditional consumption of enzyme for the hair-saving liming process with recycling. A reduction in water used of 80 % and 50 % respectively in the hair-burning and hair-saving process was achieved. A brief economic analysis of the recycling systems used for the hair-burning process permitted us to conclude that both options are economically viable. The payback time in the recycling system using centrifugation is 3 years while for the recycling system with ultrafiltration the payback time is 4 years.En ligne : https://drive.google.com/file/d/1F7XdVDElJRImTIXYEYw7ZGvbMBsIb7U0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11593
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 2 (03-04/2011) . - p. 59-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012968 - Périodique Bibliothèque principale Documentaires Disponible Recycling lipids extracted from skins in fatliquor formulations / Olga Uhlemann in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 10 (10/1992)
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PermalinkRecycling of raw materials (collagen protein) in the leather industry -high value added application of leather solid waste / Li Chengtao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)
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PermalinkRecycling of unhairing lime liquors / K. Eldin A. Mohamaed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 3 (05-06/2003)
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PermalinkRecycling of unhairing liquors from a sheepskin tannery by ultrafiltration system / L. M. Silva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 5 (09-10/2001)
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PermalinkPermalinkRedevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
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PermalinkRedevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 3 (05-06/1978)
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PermalinkPermalinkReducing chemical consumption and waste water COD loadings by recycling in conjunction with membrane filtration / K. Hellinger in WORLD LEATHER, Vol. 14, N° 7 (11/2001)
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PermalinkReducing the risk of grain damage during bating of leather manufacturing : an alternative to pancreatic enzymes with alkaline protease from novel Bacillus Subtilis SCK6 / Li Fuyi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 9 (09/2020)
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PermalinkReducing the use of volatile organic compounds in the leather industry / Rosa M. Cuadros in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
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PermalinkReducing water and chemicals / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 42 (07-08/2020)
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PermalinkReduction of Cr (VI) formation in leather with herbal extracts / Roza Mirzamuratova in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 2 (02/2024)
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PermalinkReduction of emissions in finishing by appropriate preliminary work and selected products / H. Will in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXII (Année 1987)
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PermalinkReduction of yellowing effect on leathers with UV absorber benzophenone-4 / Safiye Meric Acikel in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
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