Assessment of properties and effect of heterogeneous cultures of aerobic micro-organisms in the bio technology of tannery wastewater / J. Kupec in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 4 (07-08/2001)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 4 (07-08/2001) . - p. 137-139 Titre : Assessment of properties and effect of heterogeneous cultures of aerobic micro-organisms in the bio technology of tannery wastewater Type de document : texte imprimé Auteurs : J. Kupec, Auteur Année de publication : 2001 Article en page(s) : p. 137-139 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Biodégradation Biopolymères Biotechnologie Boues résiduaires -- Analyse Cuirs et peaux -- Déchets Déchets industriels -- Elimination Microorganismes Tannage -- Déchets Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The article presents a review of results we obtained during recent years in the field of assessing the properties and effect of activated sludge produced during treatment of tannery wastewaters by activation. The first part primarily mentions works concerning this biornass itself (composition. activity, sorption properties and others). The second then summarises results obtained when evaluating processes under way during the removal of specific substrates produced by tanning manufacture (e.g. proteins, tanning agents). The results can serve to choose alternatives capable of use in disposing of the significant pollution that tanning emits into the environment. Note de contenu : - Survey results : Elementary analysis - Biopolymers - Adsorbance - Buffer ability - Treatment of tanning materials - Enzyme activity - Respiration activity - Biodegradation of proteins and polyphenols En ligne : https://drive.google.com/file/d/1wX_JgFPpBR5LXe7ouWq9uvYSuevSrClg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40245 [article]

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Effect of co-combustion of tannery sludge and coal on the migration of Cr in the bottom ash / Jianfei Zhou in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 1 (01-02/2014)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 1 (01-02/2014) . - p. 35-41 Titre : Effect of co-combustion of tannery sludge and coal on the migration of Cr in the bottom ash Type de document : texte imprimé Auteurs : Jianfei Zhou, Auteur ; Ya-Nan Wang, Auteur ; Xuepin Liao, Auteur ; Wenhua Zhang, Auteur ; Bi Shi, Auteur Année de publication : 2014 Article en page(s) : p. 35-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Boues résiduaires -- Analyse Chrome Combustion Déchets industriels -- Elimination Tannage -- Déchets Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The feasibility of co-combustion of tannery sludge and coal as well as mono-combustion of the sludge was analyzed by tracking the migration of Cr in the sludge and its bottom ash. Most of the Cr was found to be fixed in the bottom ash during combustion when the temperature was not over 600°C. For further analysis of the migration behaviour of Cr after combustion, speciation of Cr in bottom ash was determined by BCR (Community Bureau of Reference) method. It was found that a great deal of Cr was converted from oxidizable fraction in sludge to exchangeable fraction in bottom ash. Moreover, acid leaching test indicated Cr stabilized in the original sludge became easier to leach from the bottom ash. These facts suggest the environmental risk of Cr in the ash is much higher than in the original sludge. Therefore, co-combustion of sludge and coal without any further treatment is not a feasible way to dispose of Cr enriched tannery sludge. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Sample preparation - Characteristics of tannery sludge - Co-combustion of tannery sludge and coal - Analytical methods - RESULTS AND DISCUSSION : Characteristics of tannery sludge - Contents of Cr in bottom ashes - Speciation of Cr in bottom ashes En ligne : https://drive.google.com/file/d/1Pjkbk-U_COgMr5D--vf1eALaOW3_ItQE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21017 [article]

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Evaluation of environmental impact of typical leather chemicals. Part 2 : Biodegradability of organic tanning agents by activated sludge / Danhong Sun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 2 (03-04/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 2 (03-04/2008) . - p. 59-64 Titre : Evaluation of environmental impact of typical leather chemicals. Part 2 : Biodegradability of organic tanning agents by activated sludge Type de document : texte imprimé Auteurs : Danhong Sun, Auteur ; Qiang He, Auteur ; Zhang Wenjun, Auteur ; Yulu Wang, Auteur ; Bi Shi, Auteur Année de publication : 2008 Article en page(s) : p. 59-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylique Agents de tannage Aldéhydes Un aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle. L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse. Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde. Biodégradation Boues résiduaires -- Analyse Composés aromatiques Composés organiques Cuirs et peaux -- Industrie -- Aspect de l'environnement Environnement -- Etudes d'impact Evaluation Syntans Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The biodegradability of typical organic tanning agents, including aromatic syntans, aldehydic tanning agents and acrylic tanning agents, were investigated. The results showed that the biodegradation behaviours of these leather chemicals are closely associated with their chemical structures, molecular weights and compositions. Therefore, different organic tanning agents might result in different environmental impacts even though they belong to the same type of tanning agent. The four aromatic syntans tested exhibited low biodegradability in general. Among them, a phenol-based syntan was not biodegradable and the phenol-sulphone based syntan produced a strong inhibitory effect on respiration of activated sludge. Comparatively, the naphthalene-based syntan was somewhat easier to biodegrade than other aromatic syntans. In the cases of aldehydic tanning agents, both formaldehyde and glutaraldehyde were not biodegradable and were toxic to organisms in activated sludge. Thus, they are potential inhibitors to biodegradation of other organic compounds in wastewater. However, an aliphatic aldehydic tanning agent was biodegradable and showed no toxicity to microorganisms in activated sludge. As for acrylic tanning agents, results indicated that commercial anionic products do not have any negative effect on biodegradation activity of activated sludge but they themselves were hardly biodegraded. Whereas, cationic acrylic tanning agents have the potential to inhibit the activated sludge process when presented at a high concentration. Note de contenu : - Biodegradability of aromatic syntans - Biodegradability of aldehydic tanning agents - Biodegradability of acrylic tanning agents - Table 1 : The types and main properties of organic tanning agents used in experiments - Table 2 : BOD5 /COD values of aromatic syntans - Table 3 : BOD5 /COD values of aldehydic tanning agents En ligne : https://drive.google.com/file/d/1O2b7myavpoCSbVBi0--SckW-RKh98-ca/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38931 [article]

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Evaluation of environmental impact of typical leather chemicals. Part 3 : Biodegradability of vegetable tannin extracts by activated sludge / Qiang He in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 103-106 Titre : Evaluation of environmental impact of typical leather chemicals. Part 3 : Biodegradability of vegetable tannin extracts by activated sludge Type de document : texte imprimé Auteurs : Qiang He, Auteur ; Danhong Sun, Auteur ; Xin Liu, Auteur ; Lin Wei, Auteur ; Bi Shi, Auteur Année de publication : 2008 Article en page(s) : p. 103-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biodégradation Boues résiduaires -- Analyse Cuirs et peaux -- Industrie -- Aspect de l'environnement Déchets industriels -- Elimination Environnement -- Etudes d'impact Tanins végétaux Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The short-term (5 day) and long-term (30 day) biodegradation behaviours of black wattle, bayberry, valonia and chestnut tannin extracts were systematically investigated in this paper. The results indicated that all of these four vegetable tannin extracts are biodegradable although they might retard the biodegradation process to some extent owing to the inhibitory effect of tannins on the activated sludge process. Short-term biodegradabilities of the four tannin extracts were concentration-dependent. These tannin extracts could be effectively biodegraded in 5 days at concentrations of 0.25g/L, but the biodegradation process was retarded remarkably when the concentrations were increased to 5.00g/L. In general, short-term biodegradabilities of the four tannin extracts follow the sequence of valonia tannin>chestnut tannin>bayberry tannin>wattle tannin, implying that the hydrolysable tannins are easier to biodegrade than the condensed tannins. The results of long-term biodegradation showed that all of the four vegetable tannin extracts can be completely biodegraded by prolonging the activated sludge process, even if they are present at high concentration. Therefore, the encouraging findings in this research suggest that vegetable tannin extracts are environmentally friendly leather chemicals. Note de contenu : - BOD5/COD values of vegetable tannin extracts - Respiration of activatedslud ge in the presence of vegetable tannin extracts - COD removals of vegetable tannin extracts by the activatedslud ge process - COD removals (%) of vegetable tannin extracts at different concentrations - Table 1 : Type andtannin content of vegetable tannin extracts tested in experiments - Table 2 : BOD5 /COD values of vegetable tannin extracts at different concentrations En ligne : https://drive.google.com/file/d/1rkdcAB3YoMjEm3urqqTf-HjnXnzkK-x3/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38954 [article]

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The effect of enzyme pre-treatment for tannery sludge / Li Xiaoxing in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 5 (09-10/2015)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 5 (09-10/2015) . - p. 255-258 Titre : The effect of enzyme pre-treatment for tannery sludge Type de document : texte imprimé Auteurs : Li Xiaoxing, Auteur ; Chen Jie, Auteur ; Jia Jizhang, Auteur Année de publication : 2015 Article en page(s) : p. 255-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Boues résiduaires Boues résiduaires -- Analyse Déchets industriels -- Elimination Décomposition (chimie) Peptidases Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Some of the basic properties of tannery sludge were examined by using GC-MS, atomic absorption spectrophotometry and other methods. The effect of enzyme pre-treatment for tannery sludge was studied. The results showed that the alkaline protease 2709 and neutral protease As.1398 can effectively prompte the soluble chemical oxygen demand of tannery sludge. Alkaline protease 2709 enzymatic pre-treatment can promote anaerobic digestion of tannery sludge. It can increase the rate of decomposition of organic matter by 23.01 %, and increase methane gas production by 144.89 %. Used together with ultrasound pre-treatment alkaline protease 2709 and can promote anaerobic digestion and increase the rate of decomposition of organic matter by 65.63 % and gas production by 425 %. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Experimental methods - Testing and characterization - RESULTS AND DISCUSSION : The concentration of heavy metals in tannery sludge - The effect of enzyme pre-treatment to soluble cod (SCOD) of tannery sludge - The effect of alkaline protease 2709 pretreatment on the anaerobic digestion of tannery sludge - The effect of alkaline protease 2709 and ultrasound pre-treatment on the anaerobic digestion of tannery sludge En ligne : https://drive.google.com/file/d/1x-SFCWxyWz-JnU3hjdJZisAI7JwBiyHv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24657 [article]

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