Reduction of water demand and treatment cost in tanneries through reuse technique / Mariliz Gutterres in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 4 (04/2008)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 4 (04/2008) . - p. 138 - 143 Titre : Reduction of water demand and treatment cost in tanneries through reuse technique Type de document : texte imprimé Auteurs : Mariliz Gutterres, Auteur ; J. O. Trierweiler, Auteur ; L. S. Severo, Auteur ; P. M. Aquim, Auteur ; J. B. Passos, Auteur Année de publication : 2008 Article en page(s) : p. 138 - 143 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery industries employ great amounts of water; because most of their processes occur in an aqueous medium. This leads to the generation of high wastewater flowrates which will have to be treated due to the relatively high concentrations of some pollutant species. The attending paper presents this problematic throughout a case study in Rio Grande do Sul, state of Brazil. It establishes the water consumption in each stage of leather processing. In order to achieve the reduction in the total water consumption, herein it is proposed the water reuse technique in some stages of the process. Experimental results, on industrial scale, are shown so that the methodology is demonstrated to be successful. Water reuse reduces the load of the wastewater treatment plant as well as it reduces the costs. Research on water demand in tanneries defines water consumption for each stage: beamhouse, tanning and pos-tanning operations. It is known that tanneries make use of water in an uncontrolled manner, usually higher than actually would be necessary. Additional, most of the stages use fresh waters from artesian wells or from rivers. Recycling technique is current in liming operation. This paper shows that reuse and recycle techniques could be applied for other operations. Alternatives of water reuse were evaluated through the analysis of the process's wastewater to estimate the concentration of some contaminant parameters. The study was carried out on industrial scale. These parameters are indicators to evaluate the water quality according with the objectives of the reuse system. During analysis, it was tested reuse in the pre-deliming and deliming stages, using 100% of the effluent from bating washing. The parameters analyzed in the process's wastewater with reuse practice did not present any considerable difference when one compared with the conventional process. It demonstrates the viability of reuse practice in tannery industry. This study is of great importance to the environmental and to tannery industry, because the reuse technology aims at a solution to water minimization that results in the maximum environmental protection and cost reduction. En ligne : https://drive.google.com/file/d/1XMrqQGYKTSRXhxdouloYSVUGwDkitjWX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2568 [article]

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