Enhanced clarification of tannery wastewater / Bruce. M. Poole 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. 24-34 Titre : Enhanced clarification of tannery wastewater Type de document : texte imprimé Auteurs : Bruce. M. Poole, Auteur Année de publication : 1982 Article en page(s) : p. 24-34 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alun Chaux Coagulation Dioxyde de carbone Eaux usées -- Recyclage Filtration Filtres Floculation Permanganate de potassium Polymères Tannage -- Aspect de l'environnement Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The chemical coagulation of tannery wastewater can lower suspended solids and BOD to levels acceptable by publicity-owned treatment works (POTWs). Lime (Ca(OH)2), a suspended solid that exists as a colloid at high pHs, is very difficult to remove through simple sedimentation. The composite suspended solids for a Beam and Tan facility after clarification alone, ranges from 750 to 1500 mg/l. Flocculation of the wastewater before settling increased efficiency of removal and produced affluent suspended solids below 500 mg/l. Experiments with potassium permanganate, alum, carbon dioxide and polymers showed that addition of alum was a cost-effective means of reducing suspended solids. The large quantity of lime present in tannery wastewater provided sufficient alkalinity for floc formation and particle entrainment. The utilization of passive tube settlers and rapid sand filtration further enhanced solids removal. Note de contenu : - PILOT TESTS : Test at Berling tanning company - test at pownal tanning company En ligne : https://drive.google.com/file/d/1KQzVDYqU9RAYil8MvbR0qABZPoPWkGxa/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17408 [article]

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