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Components of a bioflocculant prepared with bacillus subtilis for the treatment of tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 4 (07-08/2015)
[article]
Titre : Components of a bioflocculant prepared with bacillus subtilis for the treatment of tannery wastewater Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Zhao Xingxiu, Auteur ; Mu Shengdong, Auteur ; Gu Haibin, Auteur ; Zhang Jing, Auteur ; Wei Zou, Auteur ; Yang Qinhuan, Auteur Année de publication : 2015 Article en page(s) : p. 172-175 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bacillus subtilis
Eaux usées -- Analyse
Eaux usées -- Décontamination
Floculant
Fourier, Spectroscopie infrarouge à transformée de
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A bioflocculant prepared with Bacillus subtilis was used to treat tannery wastewater, followed by component analysis of the bioflocculant. The restes demonstrated that the bioflocculant prepared with Bacillus subtilis was able to treat total nitrogen, chemical oxygen demand (COD) and colour, successfully removing the compounds from tannery wastewater. Component analysis revealed that the bioflocculant contained saccharides, proteins, glycoproteins, osamines, and fats ; the bioflocculant did not contain nucleic acid. It is expected that these results will contribute to future research into the application and the mechanism by which bioflocculants remove contaminants from tannery wastewater. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials
- PREPARATION OF BIOFLOCULANT
- TREATMENT OF TANNERY WASTEWATER BY FLOCCULANT : Component analysis of the bioflocculant - Observation of the bioflocculant by FT-IR
- RESULTS AND DISCUSSION : Treatment of tannery wastewater by bioflocculant (analysis of saccharide, protein, glycoprotein, osamine, fat and nucleic acid in the bioflocculant, analysis by FT-IR)En ligne : https://drive.google.com/file/d/1AiXp7mBGBH-6gBpWhSj0M5ldj-PLsEak/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24558
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 4 (07-08/2015) . - p. 172-175[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17358 - Périodique Bibliothèque principale Documentaires Disponible Control of microorganisms on tanned leather : from fungicide to antimicrobial function leather / Haibin Gu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 2 (02/2016)
[article]
Titre : Control of microorganisms on tanned leather : from fungicide to antimicrobial function leather Type de document : texte imprimé Auteurs : Haibin Gu, Auteur ; Li Zhao, Auteur ; Jun Ma, Auteur ; Yingjie Yang, Auteur ; Changqing Zhao, Auteur ; Wuyong Chen, Auteur Année de publication : 2016 Article en page(s) : p. 69-87 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antifongiques
Antimicrobiens
Argent
ChitosaneLe chitosane ou chitosan est un polyoside composé de la distribution aléatoire de D-glucosamine liée en ß-(1-4) (unité désacétylée) et de N-acétyl-D-glucosamine (unité acétylée). Il est produit par désacétylation chimique (en milieu alcalin) ou enzymatique de la chitine, le composant de l'exosquelette des arthropodes (crustacés) ou de l'endosquelette des céphalopodes (calmars...) ou encore de la paroi des champignons. Cette matière première est déminéralisée par traitement à l'acide chlorhydrique, puis déprotéinée en présence de soude ou de potasse et enfin décolorée grâce à un agent oxydant. Le degré d'acétylation (DA) est le pourcentage d'unités acétylées par rapport au nombre d'unités totales, il peut être déterminé par spectroscopie infrarouge à transformée de Fourier (IR-TF) ou par un titrage par une base forte. La frontière entre chitosane et chitine correspond à un DA de 50 % : en deçà le composé est nommé chitosane, au-delà , chitine. Le chitosane est soluble en milieu acide contrairement à la chitine qui est insoluble. Il est important de faire la distinction entre le degré d'acétylation (DA) et le degré de déacétylation (DD). L'un étant l'inverse de l'autre c'est-à -dire que du chitosane ayant un DD de 85 %, possède 15 % de groupements acétyles et 85 % de groupements amines sur ses chaînes.
Le chitosane est biodégradable et biocompatible (notamment hémocompatible). Il est également bactériostatique et fongistatique.
Le chitosane est également utilisé pour le traitement des eaux usées par filtration ainsi que dans divers domaines comme la cosmétique, la diététique et la médecine.
Cuirs et peaux -- Conservation
Dioxyde de silicium
Dioxyde de titane
Huiles essentielles
Nanoparticules
Oxyde de zinc
Polymères
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To inhibit the microbial growth on tanned leathers including wetblue, crust leathers, finished leathers and their goods (shoes, garments, bags, etc.), fungicides are usually applied during various leather-making processes. Under the situation of increasingly strict environmental legislation, all kinds of ecofriendly fungicides were explored recently to replace the currently used noxious ones in leather industry. Meanwhile, a nontraditional new type of leather, called antimicrobial function leather, attracted more and more attention from leather chemists and technologists, because of its tempting antimicrobial protection provided and wide application prospects in many fields such as medical materials, health products, daily products, public transport vehicles, and so on. Based on the literatures published in the past decade, especially in the past five years, this review systematically and comprehensively summarizes current status and development trend about leather fungicides and antimicrobial function leather. The discussed antimicrobials contain traditional organic synthetic fungicides with small molecular weight, natural essential oils, macromolecular polymers and chitosan derivatives, and nano-inorganic antimicrobials (nanosilver, nano-ZnO, nano-TiO2, nano-SiO2, etc.). Finally, several proposals are addressed for the development of new leather fungicides and antimicrobial function leather, and especially, a new viewpoint, in which the antimicrobial leather is prepared based on various tanning mechanisms, is demonstrably presented to solve the problem of loose combination between antimicrobial substances and leather fibers. Note de contenu : - SYNTHETIC ORGANIC MICROMOLECULAR ANTIMICROBIALS
- NATURAL ESSENTIAL OILS :
- MACROMOLECULAR ANTIMICROBIALS : Antimicrobial polymers - Chitosan derivatives
- NANO-INORGANIC ANTIMICROBIALS : Nanosilver - Nano-ZnO - Nano-TiO2 - Nano-SiO2 - Nano-Copper
- TABLE : Essential oils studied in leather industryEn ligne : https://drive.google.com/file/d/1fkvFTnvzo8svNSC10e8R7d9v-WSDMLSi/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25428
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 2 (02/2016) . - p. 69-87[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17831 - Périodique Bibliothèque principale Documentaires Disponible Culture conditions optimisation of bacillus subtilis for producing bioflocculant / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 3 (05-06/2020)
[article]
Titre : Culture conditions optimisation of bacillus subtilis for producing bioflocculant Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Zhang Yizhuo, Auteur ; Yang Qinhuan, Auteur ; Yang Yang, Auteur Année de publication : 2020 Article en page(s) : p. 151-155 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bacillus subtilis
Bactéries -- Culture et milieux de culture
Biofloculant
Eaux usées -- Décontamination
Eaux usées -- EpurationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A bioflocculant seen as an environmentally friendly flocculant with potential for development, with the capacity to improve its activity and yield has become a hot topic of research among scholars in various countries. This study found that a bioflocculant produced by Bacillus subtils is able to treat leather wastewater, but the flocculation activity of the bioflocculant needs to be improved. In this paper, the culture conditions of Bacillus subtilis were optimised by single-factor and orthogonal tests. The results showed that the bioflocculant produced by Bacillus subtilis through optimising the culture conditions had good flocculation efficiency. The optimal culture temperature after optimisation was 36°C, the inoculum dose was 5% (v/v), at pH7.5, the culture time was 48 hours, the flocculation efficiency increased from 46.12% to 73.71%, an increase of 59.82%, and the production of flocculant increased from 0.45g/L to 0.61g/L, an increase of 35.56%. Through optimising the culture conditiops of Bacillus subtilis the flocculation efficiency of the bioflocculant, was improved and both the cost of flocculation and secondary pollution were reduced. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Activation of Bacillus subtilis species - Initial culture of Bacillus subtilis - Collection of bioflocculant
- SINGLE FACTOR OPTIMISATION OF CULTURE CONDITIONS : Determination of culture temperature - Determination of inoculum dose - Determination of culture pH - Determination of culture time
- ORTHOGONAL OPTIMISATION OF CULTURE CONDITIONS
- RESULTS AND DISCUSSION : Effect of culture temperature - Determination of optimum inoculum dose - Determination of optimal pH - Determination of optimum culture time - Orthogonal test of culture conditions - Comparison of effects before and after optimisation of culture conditionsEn ligne : https://drive.google.com/file/d/1ypFkJYJntpsnfPxiGliF-VWD9zQ9BMcj/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34245
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 3 (05-06/2020) . - p. 151-155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21767 - Périodique Bibliothèque principale Documentaires Disponible Determination active ingredients in bioflocculants for treatment of tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 3 (05-06/2016)
[article]
Titre : Determination active ingredients in bioflocculants for treatment of tannery wastewater Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Zhao Xingxiu, Auteur ; Gao Hongxia, Auteur ; Gu Haibin, Auteur ; Zhang Jing, Auteur ; Wei Zou, Auteur ; Yang Qinhuan, Auteur Année de publication : 2016 Article en page(s) : p. 122-126 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique
Eaux usées -- Recyclage
Floculant
Glucides
Glycoprotéines
Huiles et graisses
Osamines
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the present study, three bioflocculants were extracted from Bacillus cereus, Bacillus subtilis and Bacillus fusiformis, and their active components, including saccharides, proteins, glycoproteins, osamines, and fats, were analyzed. The results showed that saccharides were associated with flocculation. However, proteins had a weak effect on flocculation, and fats, osamines and glycoproteins had no effect. The findings elucidated the role of each ingredient in the removal of contaminants from tannery wastewater, providing a basic for understanding the mechanism of action of bioflocculants in the treatment of tannery wastewater. Note de contenu : - PREPARATION OF BIOFLOCCULANTS : Analysis of the active component of bioflocculants
- RESULTS AND DISCUSSION : Activity analysis of saccharides - Activity analysis of glycoproteins - Activity analysis of fats - Activity analysis of osaminesEn ligne : https://drive.google.com/file/d/1RwesX_GqAxnHEF8av1Wi3TZz7VsA4fPm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26444
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 3 (05-06/2016) . - p. 122-126[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18140 - Périodique Bibliothèque principale Documentaires Disponible Dynamics of removal of nitrogen from tannery wastewater using a bioflocculant / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 5 (09-10/2016)
[article]
Titre : Dynamics of removal of nitrogen from tannery wastewater using a bioflocculant Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Wuyong Chen, Auteur ; Yang Qinhuan, Auteur ; Gu Haibin, Auteur Année de publication : 2016 Article en page(s) : p. 252-256 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Azote
Eaux usées -- Epuration
Floculant
Simulation par ordinateurIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, a single bioflocculant was used to treat nitrogen in tannery wastewater. At different processing time points, the nitrogen concentrations for the total nitrogen, ammonia, Kjeldahl nitrogen, nitrate, and nitrite were determined. Furthermore, a computer simulation was performed to derive the experience dynamic equations.
The established dynamic equations can be used to predict the removal capacity of the total nitrogen, ammonia, Kjeldahl nitrogen, nitrate, and nitrite in the tannery wastewater treated with the biofloccufant, calculate the optimum processing time, and cut costs. In addition, these equations establish a foundation for studying the mechanism underlying this bioflocculant treatment for tannery wastewater.Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Strain - Media preparation - Bioflocculant preparation - Tannery wastewater treatment by the bioflocculant
- RESULTS AND DISCUSSION
- REMOVAL DYNAMICS OF VARIOUS FORMS OF NITROGEN
Appendix : Simulated tannery wastewaterEn ligne : https://drive.google.com/file/d/1zBlaXri0wqyjEvwsOPFe1aiD1WDZx-Et/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27090
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Code-barres Cote Support Localisation Section Disponibilité 18411 - Périodique Bibliothèque principale Documentaires Disponible Evaluating combinations of leather fungicides by inhibition zone / Gu Haibin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 2 (03-04/2007)
PermalinkExploring the mechanisms of the interaction between a specific bioflocculant and tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
PermalinkFlocculation mechanism of modified bioflocculant for leather wastewater treatment / Zhang Yizhuo in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 4 (07-08/2020)
PermalinkIsolation and identification of bacteria and yeast in leather shoes worn by diabetics / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)
PermalinkIsothiazolinone as a fungicide for leather and shoe lining / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkMedium optimisation for bioflocculant produced from bacillus cereus / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 3 (05-06/2017)
PermalinkNew antimicrobial complex of copper (II) with benzothiazole derivative : synthesis and application in leather industry / Haibin Gu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 3 (03/2008)
PermalinkOptimisation for preparation conditions of modified bioflocculant based on the tannery wastewater treatment / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 3 (05-06/2022)
PermalinkOptimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater / Guangyu Ran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
PermalinkRemoval of chromium(VI) from tannery wastewater by immobilized bacillus fusiformis / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 1 (01-02/2010)
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