Pilot-plant study of flocculation of suspended solids in lime-sulfide unhairing effluents / E. H. Bitcover in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXV (Année 1980)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXV (Année 1980) . - p. 108-118 Titre : Pilot-plant study of flocculation of suspended solids in lime-sulfide unhairing effluents Type de document : texte imprimé Auteurs : E. H. Bitcover, Auteur ; J. E. Cooper, Auteur ; David G. Bailey, Auteur Année de publication : 1980 Article en page(s) : p. 108-118 Note générale : bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : We have studied that removal of suspended solids from commercial unhairing effluents by means of a pilot-plant continuous flow apparatus. effluents were obtained from tanneries which processed either fresh or salt-cured hides in paddle vats or hide processors. Approximately 80 to 85 percent of the suspended solids were removed from the effluents tested. The results subtantiate earlier laboratory studies that established the ranges of effluent compositions (pH, salt content, suspended solids, and soluble organic content) for which specific flocculation treatments are effective. Note de contenu : - Unhairing wastes - Flocculating agents - Composition variables - Analytical methods En ligne : https://drive.google.com/file/d/1DYeyr3Si9CwlyngNbbaU7PoHivAjk1FA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17730 [article]

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Use of TOC as an alternative to COD for monitoring the biooxidation of tannery unhairing waste / J. E. Cooper in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXV (Année 1980)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXV (Année 1980) . - p. 331-339 Titre : Use of TOC as an alternative to COD for monitoring the biooxidation of tannery unhairing waste Type de document : texte imprimé Auteurs : J. E. Cooper, Auteur ; E. H. Bitcover, Auteur ; E. M. Filachione, Auteur ; J. W. Harlan, Auteur ; David G. Bailey, Auteur ; Stephen H. Feairheller, Auteur Année de publication : 1980 Article en page(s) : p. 331-339 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A test for chemical oxygen demand (COD), requiring approximately 4 hr, is commonly used to monitor the biooxidation of wastes. A test for total organic carbon (TOC), which requires only 3 to 5 min, was compared with the more time-consuming method to determine if it could be used to estimate the COD test and to monitor the biooxidation. Both TOC and COD were determined for various proteins and amino acids, and the results of the two methods correlated well. The biooxidation of tannery unhairing wastes, complex industrial wastes characterized by high solids content, was monitored by both TOC and COD tests. The results obtained indicate that the TOC test is an acceptable alternative to the COD test when the composition of the waste does not vary significantly with time. Note de contenu : - Apparatus - Bioreactors - Reagents - Test compounds - Test solutions - TOC and COD analyses - Tannery unhairing wastes En ligne : https://drive.google.com/file/d/1ApXm4TdpcYd7rvnKxekq9B1aLY-9LPRB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17773 [article]

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