Algae development in tannery wastewater treatment tanks / Sreeparna Das in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 1 (01-02/2021)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 1 (01-02/2021) . - p. 41-48 Titre : Algae development in tannery wastewater treatment tanks Type de document : texte imprimé Auteurs : Sreeparna Das, Auteur ; Debojyoti Das, Auteur ; Sudin Pal, Auteur ; Shuvadip Adhikari, Auteur ; Sanjoy Chakraorty, Auteur ; Subhra Kumar Mukhopadhyay, Auteur Année de publication : 2021 Article en page(s) : p. 41-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algues unicellulaires Caractérisation Cuirs et peaux -- Industrie Eaux usées -- Analyse Phytoplancton Statistique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : We have carried out this study to characterise the physico-chemical properties of the tannery effluents at different treatment tanks and to identify if any aerobic planktonic forms are thriving in the toxic effluents. Pearson correlation matrix suggests significant positive correlation between pH and TSS, acidity, Pb and Cr. A significant positive correlation between TDS, EC and salinity is also recorded. The concentrations of six metals, namely, Cr, Pb, Cu, Zn, Mn and Fe are well within the safe limits. Principal Component Analysis, a dimension-reduction tool, shows that out of seventeen physico-chemical variables, fourteen variables contain most of the information to influence the biota. Canonical Correspondence Analysis plot strongly suggests that the physico-chemical factors significantly influenced the occurrence of phytoplankton in treatment sites of CETPs. This work addressed the basic study questions, whether any oxygen liberating life-foret is thriving in the treatment tanks that could be used in biological amelioration of toxic tannery effluents! We record the occurrence of three species of Cyanophyceae, one species under Chlorophyceae, two under Euglenophyceae and a single Bacillariophyceae in the treatment tanks extending an opportunity for further researches on the efficiency of these algal species in ameliorating different toxicants in the tannery wastewaters. Note de contenu : - Study area and period - Physico-chemical analyses - Phytoplankton enumeration - Statistical analyses - Table 1 : Physico-chemical conditions (mean ± SD) of wastewater in different treatment tanks of CETPs at CLC, Kolkata - Table 2 : Pearson correlation matrix En ligne : https://drive.google.com/file/d/1iKQ6n3GByceKzivm4-0zO6tciwrK8O4s/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35316 [article]

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Assessment of carbon contribution to the East Kolkata Welland Ecosystem (Ramsar Site: 1208) by leather producing units of the Calcutta Leather Complex : Part I / Sudin Pal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 1 (01-02/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 1 (01-02/2015) . - p. 1-7 Titre : Assessment of carbon contribution to the East Kolkata Welland Ecosystem (Ramsar Site: 1208) by leather producing units of the Calcutta Leather Complex : Part I Type de document : texte imprimé Auteurs : Sudin Pal, Auteur ; Buddhadeb Chattopadhyay, Auteur ; Subhra Kumar Mukhopadhyay, Auteur Année de publication : 2015 Article en page(s) : p. 1-7 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bilan des émissions de gaz à effets de serre Cuirs et peaux -- Industrie -- Inde Dioxyde de carbone Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the context of addition of carbon to East Kolkata Wetland (EKW) ecosystem, an attempt has been made to provide a comprehensive computation of carbon input by raw hides-skins and different chemicals ; and carbon output by various solid and liquid waste from the leather industry. The calculations are based on the conventional operations of nine tanneries of which three produce bag leather, three gloves and three shoe uppers. The amount of carbon that enters into the leather industry depends upon the selection of raw hides and skins, percentage of chemicals used and purity of chemicals. ln case of bag leather and shoe upper manufacturing units the carbon value changes depending on the tannery specific finishing recipe, spray types and number of coats. Besides this the carbon value also changes with the customeris required finish. Whereas the carbon value of solid and liquid wastes changes depending upon the carbon input, mechanical operations and the binding of chemicals with hides and skins. The analysis of large samples from nine selected tanneries has permitted us to calculate that 396.1 ± 11.67kg carbon are present in one tonne raw cattle hides or skins. The processing of this one tonne cattle raw hides and skins results in 65.54 ± 13.06kg carbon being incorporated with chemicals and, from which 320.75 ± 16.37kg of carbon are discharged in the EKW area through different solid and liquid wastes. The tannery agglomerates at the Calcutta Tannery Complex at Bantala, Kolkata are situated on the boundary of the EKW, a Ramsar site, and so this work is thought to be important to assess the carbon-budget of the EKW ecosystem. Note de contenu : - MATERIALS AND METHODS - RESULTS : Process variations - Bag leather tanneries - Glove leather tanneries - Shoe upper tanneries - DISCUSSION : Soaking - Liming - Pickling and chrome tanning - Mechanical operations and post-tanning - Carbon sources En ligne : https://drive.google.com/file/d/1aVYTSm-19LE3A6Gro5nlskWAaGy2YqXH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23227 [article]

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Assessment of carbon contribution to the East Kolkata Wetland ecosystem (Ramsar Site : 1208) by leather producing units of the Calcutta leather complex : Part II / Sudin Pal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 2 (03-04/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 2 (03-04/2015) . - p. 70-79 Titre : Assessment of carbon contribution to the East Kolkata Wetland ecosystem (Ramsar Site : 1208) by leather producing units of the Calcutta leather complex : Part II Type de document : texte imprimé Auteurs : Sudin Pal, Auteur ; Buddhadeb Chattopadhyay, Auteur ; Subhra Kumar Mukhopadhyay, Auteur Année de publication : 2015 Article en page(s) : p. 70-79 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bilan des émissions de gaz à effets de serre Cuirs et peaux -- Industrie -- Inde Dioxyde de carbone Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : ln the context of addition of carbon to East Kolkata Wetland (EKW) ecosystem, an attempt has been made to provide a comprehensive computation of carbon input by raw hides-skins and different chemicals ; and carbon output by various solid and liquid waste from the leather industry. The calculations are based on the conventional operations of nine tanneries of which three produce bag leather, three gloves and three shoe uppers. The amount of carbon that enters into the leather industry depends upon the selection of raw hides and skins, percentage of chemicals used and purity of chemicals. In case of bag leather and shoe upper manufacturing units the carbon value changes depending on the tannery specific finishing recipe, spray types and number of mats. Besides this the carbon value also changes with the customerfs required finish. Whereas the carbon value of solid and liquid wastes changes depending upon the carbon input, mechanical operations and the binding of chemicals with hides and skins. The analysis of large samples from nine selected tanneries has permitted us to calculate that 396.1 ± 11.67kg carbon are present in one tonne raw catie hides or skins. The processing of this one tonne caille raw hides and skins results in 65.54 t 13.06kg carbon being incorporated with chemicals and, from which 320.75 ± 16.37kg of carbon are discharged in the EKW area through different solid and liquid wastes. The tannery agglomerates at the Calcutta Tannery Complex at Bantala, Kolkata are situated on the boundary of the EKW, a Flamsar site, and sa this work is thought to be important to assess the carbon-budget of the EKW ecosystem. En ligne : https://drive.google.com/file/d/11Aom5PWXk90trk2XyRQD5hDlRulnxAzT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23743 [article]

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