Continuous automatic beamhouse processing. III. Effects of processing conditions on the rapid soaking and unhairing of cattlehides / D. J. O'Brien in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIX (Année 1984) . - p. 370-380 Titre : Continuous automatic beamhouse processing. III. Effects of processing conditions on the rapid soaking and unhairing of cattlehides Type de document : texte imprimé Auteurs : D. J. O'Brien, Auteur ; M. Komanowsky, Auteur ; G. E. Senske, Auteur ; W. K. Heiland, Auteur Année de publication : 1984 Article en page(s) : p. 370-380 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Rapid soaking and unhairing of brine-cured cattlehides are integral functions of the continuous automatedd beamhouse process developed at the Eastern Regional Research Center of the U.S. Department of Agriculture. Experiments in the continuous beamhouse pilot plant facility determined that effective unhairing in 10 mins could be accomplished with 4%-6% Na2S (100 % basis). Lower Na2S concentrations required longer contact times or control of salt levels in the unhairing liquor. Estimates of chemical and water use are also presented. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9082 [article]

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Reduction of tannery waste volume through countercurrent reuse of process streams / M. Komanowsky in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XXVII (Année 1982) . - p. 206-223 Titre : Reduction of tannery waste volume through countercurrent reuse of process streams Type de document : texte imprimé Auteurs : M. Komanowsky, Auteur ; G. E. Senske, Auteur Année de publication : 1982 Article en page(s) : p. 206-223 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery effluents are expensive to treat - biologically because of their high waste loads and physiochemically because of their large volumes. Countercurrent reuse of all prechrome processing streams in a manner similar to classical multistage leaching drastically reduced the effluent volume generated in the preparation of hides for tanning (to between 1/10 and 1/20 of the present volume). Pretreatment of process streams was limited, consisting only of ammonia recovery from the bating solution, sludge separation from the unhairing effluent, and pH adjustement of the post-relime and post-bate wash waters. The resulting leathers were comparable in physical strength and visual appareance to those made conventionally , although they had a slightly less uniform coloration when dyed than conventionally produced leather. This problem was partially eliminated by adding detergent, and by increased mechanical action. This report contrasts countercurrent with conventional processing in terms of the chemical composition of the hides and of the effluents at corresponding processing stages. The benefits derived from this processing approach with regard to pollution are also discussed. En ligne : https://drive.google.com/file/d/1M0g2XDu7fJ-ZwxEWUWyqLsBZ6arz4GBA/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17444 [article]

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