Removal of sulphide in tannery effluent by wet oxidation / G. Sekaran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 4 (07-08/1995)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 4 (07-08/1995) . - p. 123-126 Titre : Removal of sulphide in tannery effluent by wet oxidation Type de document : texte imprimé Auteurs : G. Sekaran, Auteur ; K. Chitra, Auteur ; M. Mariappan, Auteur Année de publication : 1995 Article en page(s) : p. 123-126 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Sulphide in limeyard waste-water is generally estimated to be present at levels of the order of 2,000-3,000 mg/l. Oxidation by air in the presence of manganese sulphate as catalyst is a possible removal technique but there is a likelihood of increasing the level of Total Dissolved Solids (tDS) in the effluent. Rice bran based granular activated carbon may be used as a catalyst to oxidise sulphide (up to 90 %) by air, irrespective of the initial concentration of sulphide The efficiency of removal of sulphide increases to 99 % when an activated carbon packed counter current reactor is used. During the oxidation of sulphide in limeyard waste-water, 92 % of the total oxygen demand and 90 % of the dissolved protein were removed. En ligne : https://drive.google.com/file/d/1artq-YnQK_0lli1cQ_lcwiBN4spt00ZX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8217 [article]

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Treatment of saltless curing waste using hydrogen peroxide / G. Sekaran in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIII (Année 1988) . - p. 5-16 Titre : Treatment of saltless curing waste using hydrogen peroxide Type de document : texte imprimé Auteurs : G. Sekaran, Auteur ; W. Madhavakrishna, Auteur ; K. Chitra, Auteur Année de publication : 1988 Article en page(s) : p. 5-16 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the absence of an effective method of treating soak liquor containing sodium chloride, an alternative curing technique for hides and skins using phenol-borax mixture is discussed. The characterization of spent liquor, first soak liquor and second soak liquor is reported. Anaerobic treatment of phenolic waste liquor does not yield the desired results, but treatment with hydrogen peroxide and a catalyst produced good results. The optimum conditions like pH, phenol : H2O ratio, the catalyst (FeSO4, 7 H2O) and phenol concentrations have been arrived at for the maximum removal of phenol. The residual phenol, after treatment with hydrogen peroxide, can be successfully removed using lime under agitation. En ligne : https://drive.google.com/file/d/1dKytCY4aG987tzUEexlb7b0AWZ21oxCx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8839 [article]

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Treatment of slaughterhouse wastewater by integrated anaerobic/aerobic bioreactors loaded with immobilized nanoporous activated carbon / P. Maharaja in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 9 (09/2021)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 9 (09/2021) . - p. 303-311 Titre : Treatment of slaughterhouse wastewater by integrated anaerobic/aerobic bioreactors loaded with immobilized nanoporous activated carbon Type de document : texte imprimé Auteurs : P. Maharaja, Auteur ; M. Mahesh, Auteur ; N. Prabhakaran, Auteur ; K. Patchaimurugan, Auteur ; S. Swarnalatha, Auteur ; G. Sekaran, Auteur Année de publication : 2021 Article en page(s) : p. 303-311 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Abattoirs Bioréacteurs Charbon actif Eaux usées -- Epuration Matériaux nanoporeux Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Slaughterhouse wastewater consists of moderate to high strength complex wastewater comprising about 45% soluble and 55% coarse suspended organics exhibiting high COD and BOD levels. Conventional wastewater treatment methods cannot effectively treat slaughterhouse wastewater. Thus, a four-stage sequential anaerobic/aerobic immobilized bio reactor system comprising a two stage Fluidized Anaerobic immobilized Reactor (FAIR – I and FAIR – II), a Fluidized Immobilized Cell Carbon Oxidation (FICCO) reactor and a Chemo Autotrophic Activated Carbon Oxidation (CAACO) reactor was tested in a slaughterhouse treating wastewater between 3 m3 /day to 17 m3 /day. Nanoporous activated carbon (NPAC) was used for the immobilization of microorganisms in all of the reactors. The NPAC BET surface area was found to be 291 m2/g with the average pore diameter of 28 Ã…. Spin density (free electrons) in the NPAC, was calculated to be 16 x 1018 spins/g using ESR spectroscopy. The overall NH3-N, TKN, COD and BOD removal efficiency was 64%, 71%, 82% and 85% respectively. Multivariate analysis (PCA and cluster analysis) found that the COD removal by the FICCO and CAACO reactors is more efficient than the FAIR reactors. The treatment was confirmed through UV-visible and UV-fluorescence spectroscopic analysis. Note de contenu : - MATERIALS AND METHODS : Materials - Source and collection of slaughterhouse wastewater - NPAC preparation - NPAC characterization - Treatment scheme for slaughterhouse wastewater - DESCRIPTION OF THE REACTORS : FAIR reactor details - FICCO reactor details - CAACO reactor details - Chemical analysis and instrumental methods - Statistical analysis - RESULTS AND DISCUSSION : Characteristics of NPAC - Performance evaluation of the four stage reactors - Multivariate statistical analysis (PCA and cluster analysis) - Catalyst NPAC organic cleavage mechanistic view - Instrumental evidence - Table 1 : Surface areas, pore volume and pore dimension of ECS - Table 2 : Slaughterhouse wastewater treatment efficacy at the various stages DOI : https://doi.org/10.34314/jalca.v116i9.4400 En ligne : https://drive.google.com/file/d/17WP86tWoKrfQvU6YcYVVQWHlFJ6UsbU4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36401 [article]

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