Environmental Developments and researches in brazilian leather sector / Miriam Cooper in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 6 (11-12/2011)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 6 (11-12/2011) . - p. 243-249 Titre : Environmental Developments and researches in brazilian leather sector Type de document : texte imprimé Auteurs : Miriam Cooper, Auteur ; Mariliz Gutterres, Auteur ; Nilson Romeu Marcilio, Auteur Année de publication : 2011 Article en page(s) : p. 243-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage Cuirs et peaux -- Industrie -- Aspect de l'environnement Cuirs et peaux -- Industrie -- Brésil Eaux usées -- Epuration Récupération (Déchets, etc.) Tannage -- Aspect de l'environnement Tannage -- Législation -- Brésil Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The importance of livestock in the production of meat and dairy products, as well as the tannery activity that uses hides and skins as raw material, is widely recognized. However, a considerable fraction of the raw material is discarded or sent to other industries because of its composition or limited value in terms of leather manufacturing. Many studies were conducted to reduce, reuse, recycle or dispose of tanning process waste. Alternatives are being implemented to ensure the adoption of environmentally safe methods that meet environmental laws, and to raise the awareness of the professionals involved in the sector. Brazil reportedly has the largest commercial cattle herd in the world, is the largest producer of bovine cattle in the world and the world's third largest producer and exporter of leather. Other significant data, as well as other indicators of the sector are presented. The present study characterizes the brazilian industry regarding the leather articles produced, where the footwear articles are the main end-use of leather. A study in 224 brazilian tanneries was performed with the purpose of finding out which are the most widely used tanning processes. A typical representation of the wastewater treatment technology most frequently adopted in Brazil comprises the stages of preliminary treatment, mechanical and physical-chemical treatment, biological treatment, sludge treatment or disposal and nitrogen removal. the most advanced wastewater treatments and water reuse in tanneries, also the main uses for by-products generated in the leather processing are presented and discussed. The work summarizes the research lines and developments conducted at the UFRGS, at the Laboratory for Leather and Environmental Studies, in order to obtain information on the lastes technologies and improvements in the leather sector. Note de contenu : - BRAZILIAN LEATHER : Production and exports - Leather articles - TANNERIES AND THE ENVIRONMENTAL LEGISLATIONS - WASTEWATER TREATMENT IN TANNERIES : Advanced wastewater treatment and water reuse in tanneries - SOLID WASTES GENERATED IN LEATHER PROCESSING : Adding value to solid tannery wastes - ENVIRONMENTAL LABORATORY RESEARCH En ligne : https://drive.google.com/file/d/1TYy0CgZixOfkHeuoup-SxrZH4iCELbgY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12878 [article]

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Tanning using basic chrome sulfate obtained from ash produced in the thermal treatment of leather wastes / Aline Dettmer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 9 (09/2010)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 9 (09/2010) . - p. 280-288 Titre : Tanning using basic chrome sulfate obtained from ash produced in the thermal treatment of leather wastes Type de document : texte imprimé Auteurs : Aline Dettmer, Auteur ; Keila Guerra Pacheco Nunes, Auteur ; Nilson Romeu Marcilio, Auteur Année de publication : 2010 Article en page(s) : p. 280-288 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tanning is the process which converts hide (putrescible) into leather (non-putrescible) material. Tanning wastes contain chrome that is classified as hazardous; consequently, finding satisfactory treatments or proper disposal is a fundamental necessity. Few studies on alternatives treatments for these wastes have addressed the thermal treatment of shavings and trimmings generated during the production process. The ash obtained in this process is rich in chromium oxide, which can be recovered and reused in the tanning process. Firstly, the method consists of obtaining sodium chromate, followed by the production of basic chromium sulfate that can be applied in leather tanning. Preliminary tests were carried out utilizing the tanning salt solution obtained from the ash in tanning hide powder experiments. Two simultaneous analyses were carried out using the product obtained in the laboratory and a commercial product sample, to confirm the efficacy of the salt obtained from the ash. Secondly, the sulfate obtained in the laboratory was applied in the tanning of hide samples, and again two simultaneous analyses were carried out. The results obtained in this work were satisfactory and the typical characteristics of tanned hides were achieved, that is, the hydrothermal stability of the tanned samples and their structure modification (distance between fibers) verified using electron microscopy. En ligne : https://drive.google.com/file/d/1sW9LL9OZHRST0yYE5-ricvo7QXpGJpvx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10506 [article]

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