Are indexes characterizing the efficiency of biological treatment of wastewater reliable criterIa for the assessment of the impact of chromium compounds on activated sludge ? / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 4 (07-08/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 4 (07-08/2009) . - p. 152-157 Titre : Are indexes characterizing the efficiency of biological treatment of wastewater reliable criterIa for the assessment of the impact of chromium compounds on activated sludge ? Type de document : texte imprimé Auteurs : Barbara Felicjaniak, Auteur Année de publication : 2009 Article en page(s) : p. 152-157 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The essay presents the research on the impact of chromium compounds on the effectiveness of biological treatment of effluents by activated sludge, the structure of activated, sludge, the composition of microfauna and sedimentation characteristics of activated sludge. The determinations of the indexes of pollution of wastewater have been carried out according to Polish standards, with the exception of CODCr of biologically has been developed, eliminating the impact of hexavalent chromium added to effluents. In the research it has been established that oxygen indicators were not a reliable criterion for the assessment of impact of chromium compounds on activated sludge. Their value did not reflect the level of activated sludge degradation. The effluents treated with strongly degraded activated sludge, with a completely fibrous structure and very little of microfauna had low values of oxygen indictors, testifying to effective treatment. With the increase of chromium concentration in the effluents undergoing treatment there was an increase in the count of filiform bacteria, most probably that is why ; notwithstanding the high concentrations of chromium compounds, activated sludge, due to the fact that it was impossible to establish which part of organic substances was metabolized by heterotrophic bacteria characteristic of activated sludge, and which part by filiform bacteria. It was also misleading to analyze the sedimentation characteristics of activated sludge on the basis of sludge volume index (SVI). Strongly degraded sludges with completely fibrous structure were characterized by low values of volume indexes testifying to good sedimentation characteristics. In fact, such fibrous sludge sedimented very well, but the reasons for this were adsorbed chromium compounds. In the research it has been established that oxygen indicators were not a reliable criterion for the assessment of the impact of chromium compounds on activated sludge. the microscopic structure research and microfauna composition examination of the activated sludge proved necessary. En ligne : https://drive.google.com/file/d/1e5NRTJIfJUgy7ANATNAyk9z8otbZjlzf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6106 [article]

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Bating of furrier sheepskins in recycled liquors after analytical standardisation of proteolytic activity / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 78, N° 1 (01-02/1994)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 78, N° 1 (01-02/1994) . - p. 16-22 Titre : Bating of furrier sheepskins in recycled liquors after analytical standardisation of proteolytic activity Type de document : texte imprimé Auteurs : Barbara Felicjaniak, Auteur Année de publication : 1994 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The bating of fur, sheep skins in recycled enzyme-pickle liquors was the subject of intensive investigation. The method for analytical standardisation of proteolytic activity in spent liquors was developed in order to allow us to control standard bating conditions. The technology has been applied on a commercial scale in the industry since 1990 and gives good results being an effective process giving good quality and a high area yield of leather. En ligne : https://drive.google.com/file/d/1M9iVlQ-x8R2wiW1KQyEE8QubjCkN5a9S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8395 [article]

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Clean technology - supernatant recirculation after separation of chromium / K. Kosinska in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 4 (07-08/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 4 (07-08/2009) . - p. 145-147 Titre : Clean technology - supernatant recirculation after separation of chromium Type de document : texte imprimé Auteurs : K. Kosinska, Auteur ; Barbara Felicjaniak, Auteur ; B. Zaczek, Auteur ; M. Urbaniak, Auteur Année de publication : 2009 Article en page(s) : p. 145-147 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The research was aimed at the decrease of sewage salinity. The aim was to be achieved by means of recirculation, i.e., technological reuse of chromium-free pickling/tanning baths (supernatant). Supernatant was used inpickling/tanning process of hides. Before the subsequent use chlorides were supplemented. In the paper the number of technological cycles that can be carried out without any damage to the quality of hides has been determined. The resutls have been compared with results achieved in traditional technology, without the use of recirculation. After subsequent recirculation cycles, the supernatant was assessed by the following factors : chlorides, sulphates, general chromium, Kiejdahl general nitrogen, organic nitrogen, chemical oxygen demand (COD), 5- day biological oxygen demand (BOD5). The quality of hides was assessed in wet blue and crust semi-finished products. It has been found that supernatant recirculation in chromium pickling/tanning of hides is fully possible and it does not lower the quality of hides. After eight recirculations the general consumption of sodium chloride decreased by about 45 % compared with the amound used in traditional hide pickling process. En ligne : https://drive.google.com/file/d/18jFtJl8Pbh2brOLWYWHmPjAzV19Se0xp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6104 [article]

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Studies on enzymatic dehairing : Part III. Enzymatic depilation of pigskins modified by alkalisation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 70 (Année 1986) . - p. 14-17 Titre : Studies on enzymatic dehairing : Part III. Enzymatic depilation of pigskins modified by alkalisation Type de document : texte imprimé Auteurs : Barbara Felicjaniak, Auteur Année de publication : 1986 Article en page(s) : p. 14-17 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The pancreatic enzymes and the bacterial enzymatic preparation, proteopol BP, are characterized by their vigorous activity against the grain of pigskins in the depilation process. The tests described in parts I and II of this work showed that there is possibility of limiting grain destruction through alkaline preparation of the skin substrate. The effectiveness of the method developed required industrial checking which, with complementary testings of the enzymatic process, is the subject of the present part of the work. En ligne : https://drive.google.com/file/d/1Aa8IoxOOmg9iHQTq7A9S-v1P2TWldcYQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9193 [article]

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Studies on enzymatic dehairing : Part IV. Methods of preparing calfskins for enzymatic depilation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 70 (Année 1986)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 70 (Année 1986) . - p. 17-18 Titre : Studies on enzymatic dehairing : Part IV. Methods of preparing calfskins for enzymatic depilation Type de document : texte imprimé Auteurs : Barbara Felicjaniak, Auteur Année de publication : 1986 Article en page(s) : p. 17-18 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Quantitative differences in the composition and structure of animal skin are significant. Even collagen, considered to be its most consistent component, shows characteristic chemical differences. Therefore, it is necessary to check the usefulness of the tanning methods for one type of skin before using them for others. The purpose of the work discussed below was to check whether the method for enzymatic dehairing, elaborated and successfully used for pigskins on a commercial scale, may be used also for other kinds of skins. Calfskins were chosen as a subject to compare. Calfskins from animals about one month old were sujbected to testing. The tests had a practical aspect in respect of environmental protection and the reclamation of hair which is valuable for felt production. En ligne : https://drive.google.com/file/d/1WUi-QHgL37qim9fF0lBbk48IJ8oHil5u/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9194 [article]

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Studies on enzymatic unhairing : Part I. The influence of pigskin alkalisation on destruction of skin grain during depilation with pancreatic enzymes / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)  

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Studies on enzymatic unhairing : Part II. The influence of alkalisation on the destruction of the grain of pigskins depilated with a bacterial enzymatic preparation / Barbara Felicjaniak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)  

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