Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) / Joao Antonio Pessoa da Silva in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 4 (07-08/2017)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 4 (07-08/2017) . - p. 190-194 Titre : Processing of amazon catfish skins - dourada (brachyplathstoma sp.) and piraiba (brachyplatystoma sp.) Type de document : texte imprimé Auteurs : Joao Antonio Pessoa da Silva, Auteur ; Crislaine Fabiana Bertoldi, Auteur ; Aline de Cassia Campos Pena, Auteur ; Manoel Rodrigues da Silva, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2017 Article en page(s) : p. 190-194 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de Poissons Déchets organiques -- Recyclage Microscopie Tannage au chrome Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this work, Piraiba and Daurade skin wastes were used for leather processing. They were initially stripped and characterized by their percentage composition. The results showed that pH, differential pH cipher [SLC13/ WC 111 BS 1309:9 — Determination of pH value and Difference Figure of an Advenus Extract], chromium content and mechanical properties after chromium tanning were in accord with leather specifications. Further results demonstrate that the tensile and tear strength of the leather varied depending on the direction of the collagen fibres. Microscopic analysis allowed us to verify that the fibre structure is interlaced and compact. This work also determined that the shrinkage temperatures, as measured by DSC were 98.24 and 104.06°C for Dourada and Piraiba leather, respectively, In conclusion, the characterization demonstrated the feasibility of using waste skins of Piraiba and Daurade for leather processing, adding value to a sub-product of fish processing. Note de contenu : - Skin preparation and leather processing - TABLES : 1. Formulation for processing fishkins - 2. Composition of fishskins - 3. Properties of fish leathers - 4. Physical and mechanical properties of fish leathers - 4. Thickness and tear strengthof fish leathers - FIGURES : 1. Optical microscopy of the Dourada and Piraiba leather surface observed in stereomicroscope (70x) - 2. DSC curves of the fish leathers En ligne : https://drive.google.com/file/d/1Wu55cCDvpoMitd1qC7tvylOUTsiuAO_v/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28893 [article]

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Tetraselmis sp. isolated from a microalgae consortium for tannery wastewater treatment / Aline de Cassia Campos Pena in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 258-261 Titre : Tetraselmis sp. isolated from a microalgae consortium for tannery wastewater treatment Type de document : texte imprimé Auteurs : Aline de Cassia Campos Pena, Auteur ; Livia de Souza Schaumlöffel, Auteur ; Luciane Ferreira Trierweiler, Auteur ; Mariliz Gutterres, Auteur Année de publication : 2018 Article en page(s) : p. 258-261 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algues unicellulaires Cuirs et peaux -- Industrie -- Aspect de l'environnement Eaux usées -- Analyse Eaux usées -- Epuration Eaux usées -- Recyclage Tetraselmis Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Microalgae have been the subject of several studies in the wastewater treatment field due to their ability for the removal of various nutrients, organic load and to be a clean and economical way to treat pollutants. The effluents from leather finishing processing steps contain chemical pollutants due to the use of dyes, surfactants, toxic metals, emulsifying agents, retanning agents, oils, pigments, resins, among other chemicals added. In this work, the isolated microalgae Tetraselmis sp. was obtained from a microalgae consortium and evaluated for their ability for the treatment effluents collected from a tannery. The growth of microalgae biomass in these effluents in mixotrophic cultivation was analysed, as well as, the capacity of removal of total nitrogen (TN), total organic carbon (TOC), total carbon (TC), inorganic carbon (IC), ammonia (N-NH3), phosphorus (P-PO4), chemical oxygen demand (COD) and biological oxygen demand (BOD). The removal values observed for the 50R50T (50% raw/50% treated effluent) and 75R25T (75% raw/25% treated effluent) concentrations were 96.59% and 99.81% for phosphorus, 99.90% and 89.2% for ammoniacal nitrogen, 89.06% and 54.78% for TN, 40.46% and 43.54% for COD, 59.24% and 57.90% for TOC, 32.70% and 44.73% for BOD, respectively. The microalgae Tetraselmis sp. showed notable growth in mixotrophic cultivation, and the efficient removal of the controlled parameters indicate an enormous potential for application in tannery wastewater treatment. Note de contenu : - Isolation of microalgae from a consortium - Wastewater treatment experiments - Wastewater analyses - Fig. 1 : Optical microscopy of the microalgae consortium and isolated microalgae - Fig. 2 : Growth of the microalgae Tetraselmis sp. in along cultivation in composite effluents - Fig. 3 : Removal of total nitrogen along Tetraselmis sp. cultivation in composite effluents - Fig. 4 : Removal of ammonia along Tetraselmis sp. cultivation in composite effluents - Fig. 5 : Phosphorus removal along Tetraselmis sp. cultivation in composite effluents - Fig. 6 : Carbon removal along Tetraselmis sp. cultivaiton in composite effluent (50R50T) - Fig. 7 : Carbon removal along Tetraselmis sp. cultivation in composite effluent (75R25T) En ligne : https://drive.google.com/file/d/1p03lpq59XuihPsXYRjVq6r_HVpYvfSfB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31112 [article]

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