Anaerobic treatment of tannery wastewater with sulfide removal and recovery of sulfur from wastewater and biogas / R. Suthanthararajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 2 (02/2004)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCIX, N° 2 (02/2004) . - p. 67-72 Titre : Anaerobic treatment of tannery wastewater with sulfide removal and recovery of sulfur from wastewater and biogas Type de document : texte imprimé Auteurs : R. Suthanthararajan, Auteur ; T. Ramesh, Auteur ; S. Rajamani, Auteur ; B. Umamaheswari, Auteur ; E. Ravindranath, Auteur ; K. Chitra, Auteur Année de publication : 2004 Article en page(s) : p. 67-72 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Tannery wastewater contains high concentrations of sulfur compounds. Feasibility studies of pilot plant Sulfur Recovery Unit (SRU) integrated with Upflow Anaerobic Sludge Blanket (UASB) reactor, which is first of its kindin India, were carried out to study the sulfide removal efficiency for tannery wastewater. SRU consists of a stripper column, absorber column, regeneration unit and sulfur separator. Stripper efficiency of about 80-95 percentage in terms of sulfide removal was achieved for a sulfide load of 1-4 kg/d at a influent pH between 7.5-8.5. At sulfide load of 10 kg/d sulfide removal efficiency of about 65 percent was observed in the stripper unit. The absorber efficiency was more than 99.8 percent throughout the study period. The presence of SRU improved the COD removal efficiency in the UASB reactor. Elemental sulfur was obtained as a useful byproduct. Sulfate present in the wastewater is converted to sulfide in the UASB reactor. The sulfide in the dissolved form is stripped, absorbed and converted to elemental sulfur in the SRU. By this process, total dissolved solids (TDS) due to sulfate 'in the wastewater is also reduced. Biogas generated can be used as a fuel after scrubbing the hydrogen sulfide from it in the sulfur recovery system. En ligne : https://drive.google.com/file/d/1joezX_rhT0mjJzNbvvCRtb4uG4RWmoxu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4181 [article]

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Evaluation of sludge behavior in upflow anaerobic sludge blanket reactor for tannery wastewater treatment / R. Suthanthararajan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CI, N° 1 (01/2006)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CI, N° 1 (01/2006) . - p. 18-22 Titre : Evaluation of sludge behavior in upflow anaerobic sludge blanket reactor for tannery wastewater treatment Type de document : texte imprimé Auteurs : R. Suthanthararajan, Auteur ; E. Ravindranath, Auteur ; T. Ramesh, Auteur ; K. Chitra, Auteur ; B. Umamaheswari, Auteur ; S. Rajamani, Auteur Année de publication : 2006 Article en page(s) : p. 18-22 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery wastewater containing high concentrations of organic and inorganic pollutants and suspended and dissolved solids was treated by anaerobic digestion in a 12.5 m3 capacity pilot scale Upflow Anaerobic Sludge Blanket (UASB) reactor. Tannery wastewater used for treatment was not diluted with domestic wastewater. The performance of the UASB system in terms of Chemical Oxygen Demand (COD) and sulfate removal, gas production, methanogenic activity and the amount of solids present in the reactor was studied at different organic loading rates. The average COD removal efficiency of about 65 % was achieved and the sulfate removal was consistently above 80 %. The organic loading rate was varied between 0.2 kg/m3/d to about 7 kg/m3/d. The average gas production in the reactor was 0.3 m3/kg of COD removed. Specific methane production and methanogenic activity in the reactor increased with the increase in organic load. Sludge profile was estimated by collecting sludge samples from different heights along the reactor. The Volatile Suspended Solids (VSS) concentration in the reactor was about 200 kgs. The average VSS concentration varied between 30-60 % of the Suspended Solids (SS) concentration. Applying a modified Monad equation, the kinetic coefficients of the anaerobic digestion were determined. The calculated amount of non-biodegradable material was about 500 mg/L, which is in agreement with the experimental value. The values for yield and decay coefficients were found to be 0.16 and 0.01, respectively. En ligne : https://drive.google.com/file/d/1MDxn8_-30OjgQF2QcYRBJ7GYk7i_yuI4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4045 [article]

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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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