Treatment and disposal of waste water for a tannery processing wet-blues to suede / B. G. S. Prasad in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 3 (03/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 3 (03/1991) . - p. 87-92 Titre : Treatment and disposal of waste water for a tannery processing wet-blues to suede Type de document : texte imprimé Auteurs : B. G. S. Prasad, Auteur Année de publication : 1991 Article en page(s) : p. 87-92 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A survey was carried out in a tannery processing wet-blue hides and skins into suedes for upper and garment leathers. It was found that about 30-35 litres of waste water was produced per kg of hide processed. The waste water from the fatliquoring and dyeing operations is the strongest. The BOD, suspended solids and total chromium content of the composite waste water varied from 900 to 1300 mg/l, 1640 to 2250 mg/l and 180 to 220 mg/l respectively. Experiments showed that a reduction of 27% in BOD and 60% of suspended solids could be achieved by settling for 4-5 hours. Treatment with 400-500 mg/l of lime reduced the BOD to 300 mg/l and suspended solids to 320 mg/l and the chromium was removed to below the limit of detection. The lime-treated effluent can be further treated in an aerated lagoon of 5 days’ detention to bring the BOD down to about 30mg/l. En ligne : https://drive.google.com/file/d/1m90DVmXWUqEssJZ6L6iXO6HjHNyXVrhA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8549 [article]

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Utilization of water hyacinth in the treatment and disposal of tannery waste water / B. G. S. Prasad in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 75 (Année 1991) . - p. 56-58 Titre : Utilization of water hyacinth in the treatment and disposal of tannery waste water Type de document : texte imprimé Auteurs : B. G. S. Prasad, Auteur ; G. Thyagarajan, Auteur ; Y. Nayudamma, Auteur Année de publication : 1991 Article en page(s) : p. 56-58 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Water hyacinth (Echorinia crassipes) was grown under controlled conditions and subjected to different concentrations of tannery effluent in order to determine the levels of contaminants tolerated by the plant and the concomitant removal of BOD and chromium. Six sets of experiments were run and samples were collected every week for analysis. Each set of experiment was carried out for between 20-24 days. The proportions of tannery waste to sewage used in these experiments were 20:80, 40:60, 80:20 and 100:0. In all the experiments, a control was carried out using only domestic sewage. It was found that the water hyacinth thrived during initial period at all levels, but began to show signs of decay after about 10 days in the three higher concentrations of tannery waste, i.e., 60:40, 80:20 and 100:0. The retarded growth and decay was observed in all the concentrations after a period of 4 weeks. The BOD removals in 16 days in all the five concentrations were 80 %, 68 %, 49 %, 35 % and 20 % respectively. Chromium was completely removed in the 20: 80 and 40:60 concentrations of tannery waste within 8 and 16 days respectively, for the other concentrations, the removals were in the range of 30-80 %. En ligne : https://drive.google.com/file/d/1JmGcB0rWoEB9oT4WAgSGjJXVUJtcrmIh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8677 [article]

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