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Auteur Bi Shi
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Sichuan University - Chengdu - China
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Efficient removal of ammonia-nitrogen from deliming effluent by using magnesium ammonium phosphate precipitation method / Hao Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 3 (03/2022)
[article]
Titre : Efficient removal of ammonia-nitrogen from deliming effluent by using magnesium ammonium phosphate precipitation method Type de document : texte imprimé Auteurs : Hao Wang, Auteur ; Chao Lei, Auteur ; Yunhang Zeng, Auteur ; Hongguang Guo, Auteur ; Bi Shi, Auteur Année de publication : 2022 Article en page(s) : p. 104-112 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Azote ammoniacal
Caractérisation
Cuirs et peaux
Déchets industriels -- Elimination
Eaux usées -- Epuration
pH
Phosphate d'ammonium
Phosphate de magnésiumLe terme phosphate de magnésium est le nom générique pour les sels inorganiques de magnésium issus de l'acide phosphorique. Leur formule est :
- le dihydrogénophosphate de magnésium (Mg(H2PO4)2) ;
- l'hydrogénophosphate de magnésium (MgHPO4) ;
- le phosphate de magnésium (proprement dit) ou phosphate de trimagnésium (Mg3(PO4)2
Ils incorporent éventuellement des molécules d'eau de cristallisation ; par exemple, le phosphate de magnésium tribasique (Mg3(PO4)2⋅nH2O) peut contenir 4, 5 ou 8 molécules d'eau. La bobierrite (it) est la forme minérale naturelle du phosphate de magnésium octahydraté.
L'hydrogénophosphate de magnésium trihydraté se présente sous la forme d'une poudre blanche cristalline. La newbéryite est sa forme minérale naturelle.
Les phosphates de magnésium entrent dans la composition du tissu osseux. (Wikipedia)
Précipitation (chimie)
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ammonia nitrogen (NH 3 -N) pollutant has received much attention in the leather industry. An efficient strategy for removal of NH 3 -N from tannery wastewater was proposed by using a magnesium ammonium phosphate (MAP) precipitation method to remove NH 3 -N from deliming effluent with the highest NH 3 -N concentration among all leather-making effluents. Results showed that approximately 80% of NH 3 -N was removed from deliming effluent when reacting at P/Mg/N mole ratio of 1.2:1.2:1.0 and pH 9.5 for 20 min. The NH 3 -N and total nitrogen concentrations of tannery wastewater (a composite wastewater of all leather-making effluents) sharply decreased by treating deliming effluent with MAP precipitation, which greatly improved the biological treatment efficiency of tannery wastewater. The residual concentration of NH 3 -N in the treated tannery wastewater was less than 2 mg/L. The total phosphorus concentration of tannery wastewater increased by less than 0.4 mg/L, indicating that secondary pollution of phosphorus did not occur after MAP precipitation treatment. Note de contenu : - EXPERIMENTAL : Materials - Effect of pH adjustment method on NH3-N removal efficency - Optimization of MAP precipitation method for removal of NH3-N from deliming effluent - Effect of P/N - Effect of Mg/N - Effect of reaction pH - Effect of reaction time - X-ray diffraction analysis of precipitate - Aerobic bological treatment of simulated tannery wastewater
- RESULTS AND DISCUSSION : Effect of pH adjustment method on NH3-H removal efficiency - Effects of reaction conditions on the removal of NH3-N from deliming effluent byusing MAP precipitation method - Characterization of precipitation - Effect of MAP precipitation method on the biological treatment of tannery wastewater
- Table 1 : Wastewater sampling from leather-making procedures
- Table 2 : Effect of pH adjustment method on nH3-N removal efficiency
- Table 3 : Concentrations of NH3-N, TOC, TN, and TP in simulated tannery wastewater before and after aerobic biological treatmentEn ligne : https://drive.google.com/file/d/1x6437XHaUBXbfG44KKIBz68wrvyhOs4J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37601
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 3 (03/2022) . - p. 104-112[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23402 - Périodique Bibliothèque principale Documentaires Disponible Efficient removal of total nitrogen from tannery wastewater by promoting denitrification with sodium acetate / Ma Xiaojian in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
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Titre : Efficient removal of total nitrogen from tannery wastewater by promoting denitrification with sodium acetate Type de document : texte imprimé Auteurs : Ma Xiaojian, Auteur ; Zhou Jianfei, Auteur ; Zeng Yunhang, Auteur ; Bi Shi, Auteur Année de publication : 2019 Article en page(s) : p. 323-327 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acétate de sodium
Chlorures
Dénitrification
Eaux usées -- Analyse
Eaux usées -- Epuration
Eaux usées -- Teneur en azote totalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Total nitrogen (TN) in tannery wastewater is difficult to remove completely, because the low C/N ratio of the wastewater leads to inadequate denitrification. Sodium acetate was used as an extra carbon source to improve the denitrification efficiency and the TN removal. The appropriate COD/TN ratio for denitrification using sodium acetate was 5.1, at which the TN concentration of tannery wastewater decreased by 95%. A much faster removal of TN was obtained by adding sodium acetate in denitrification than by adding common glucose. These results showed that sodium acetate was a high-quality carbon source for a complete and rapid denitrification of tannery wastewater. The denitrification efficiency decreased with decreasing temperature and increasing chloride concentration. However, when the carbon source was made sufficient by adding sodium acetate, complete denitrification was stil) obtained even at 15°C or 10000mg/L of chloride concentration. Note de contenu : - MATERIALS AND METHODS : Materials - Effect of temperature on anaerobic denitrification of wastewater - Effect of chloride concentration on anaerobic denitrification of wastewater - Analytical methods of pollution loads in wastewater
- RESULTS AND DISCUSSION : Effect of addition of sodium acetate on anaerobic denitrification of tannery wastewater - Effect of temperature on anaerobic denitrification of tannery wastewater - Effect of chloride concentration on anaerobic denitrification of tannery wastewaterEn ligne : https://drive.google.com/file/d/1FUylPZ3JvBdPyCNZe4mIZkDmr_wPe0I3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33211
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 6 (11-12/2019) . - p. 323-327[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21314 - Périodique Bibliothèque principale Documentaires Disponible Environment-friendly lime-free liming / Yuansen Liu in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 2 (03-04/2009)
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Titre : Environment-friendly lime-free liming Type de document : texte imprimé Auteurs : Yuansen Liu, Auteur ; Chen Yi, Auteur ; Haojun Fan, Auteur ; Hu Zhou, Auteur ; Zhaoyang Luo, Auteur ; Bi Shi, Auteur Année de publication : 2009 Article en page(s) : p. 56-60 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : As a substitute for lime, a novel liming agent based on sodium silicate and enzyme was applied in a lime-free liming process. This innovative process achieved an equivalent effect on fibre opening, shrinkage temperature (Ts) and mechanical properties of crust leather compared with a conventational liming process. The environmental factors, including total solids (TS), chemical oxygen demand (COD), sludge concentration and biodegradability of waste water were all superior to the conventional liming process, showing environmental-friendly characteristics. Another interesting phenomenon was that the traditional deliming process based on ammonium salt could be omitted. As a result, the NH3-N concentration in wastewater was greatly reduced and there is a large water saving. En ligne : https://drive.google.com/file/d/1LZW55hLQGazJK2UuDdozPe2_SpvRrfM4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5093
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 2 (03-04/2009) . - p. 56-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011279 - Périodique Bibliothèque principale Documentaires Disponible Environmental impact evaluation of typical beamhouse processes in leather manufacture based on wastewater settleability / Qiang He in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 12 (12/2005)
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Titre : Environmental impact evaluation of typical beamhouse processes in leather manufacture based on wastewater settleability Type de document : texte imprimé Auteurs : Qiang He, Auteur ; Bi Shi, Auteur ; Danhong Sun, Auteur ; Kai Yao, Auteur Année de publication : 2005 Article en page(s) : p. 473-480 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The traditional leather industry is far from sustainable. Therefore, many new leather-making processes, so called 'cleaner technologies', have been proposed to reduce the levels of pollutant emission. The objective of this study is to make an environmental impact evaluation of such processes not only based on the quantity of wastes generated but also on the wastewater treatability. This paper is mainly concerned with the settleability of wastewater. Such an evaluation might be of great significance due to the enormous amount of wastewater and increased treatment costs. The research is typified by enzyme assisted soaking and unhairing (ESU) processes that are encouraged in beamhouse processes for protecting the environment. The chemical sedimentation behavior of ESU wastewater and the wastewater generated by conventional soaking and unhairing (CSU) processes are described and compared with each other. It was found that ESU wastewater showed better sedimentation property than CSU wastewater, indicating that the enzyme assisted soaking and unhairing processes have environmental friendliness in terms of wastewater settleability. En ligne : https://drive.google.com/file/d/1_0dJjyfAM62grW4AZU5geeIACbJLIbEa/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4048
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Code-barres Cote Support Localisation Section Disponibilité 003749 - Périodique Bibliothèque principale Documentaires Disponible Enzymatic hydrolysis of skin shavings for preparation of collagen hydrolysates with specified molecular weight distribution / Chi Yuanlong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 1 (01-02/2012)
[article]
Titre : Enzymatic hydrolysis of skin shavings for preparation of collagen hydrolysates with specified molecular weight distribution Type de document : texte imprimé Auteurs : Chi Yuanlong, Auteur ; Cui Min, Auteur ; Cui Xiaoju, Auteur ; Wenhua Zhang, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2012 Article en page(s) : p. 16-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène
Cuirs et peaux -- Déchets
Hydrolysats de protéines
Hydrolyse enzymatiqueTags : 'Copeaux tannerie' 'Protéase 1398' 2709' Alcalase Papaïne Pepsine 537' Trypsine 'Titration formaldehyde' Electrophorèse 'Ges dodécyl sulfate-polyacrylamide sodium' 'Ultrafiltration centrifuge' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Collagen hydrolysates were extracted from tannery skin shavings through enzymatic hydrolysis by using protease 1398, protease 2709, alcalase, papain, pepsin, protease 537 and trypsin, respectively. The hydrolytic degree and molecular weight distribution (MWD) of the hydrolysages were evaluated by the formaldehyde titration method, sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), tricine-SDS-PAGE and centrifugal ultrafiltration. It was found that the MWD of the as prepared collagen hydrolysates has a close correlation with the hydrolytic degree, and greatly depends on the enzyme employed. The low molecular weight (MW) collagen hydrolysates, with relatively high hydrolytic degree, were obtained by enzymatic hydrolysis using protease 1398, protease 2709, papain and alcalase. More than 60% (mass ratio) of the fractions in these four hydrolysates were in the molecular weight range of <10kDa. The use of protease 537 produced medium-MW collagen hydrolysages where 40% of the fractionswere of 10-30kDa. The high-MW collagen hydrolysages that include about 66% fractions with molecular weights higher than 20kDa were obtained by using pepsin, accompanied by the lowest hydrolytic degree. This research provides a potential approache for molecular weight and molecular weight distribution control collagen hydrolysates by enzymatic hydrolysis ot tannery skin wastes. Note de contenu : - MATERIALS AND METHODS : Materials - Methods - Determination of hydrolytic degree of collagen - SDS-PAGE and tricine-SDS-PAGE determination - Centrifugal ultrafiltration analysis
- RESULTS AND DISCUSSION : Hydrolytic degree analysis
- SDS-PAGE and tricine-SDS-PAGE patterns - Centrifugal ultrafiltration analysis on MWDEn ligne : https://drive.google.com/file/d/1NEe4OCKiTxbrMEX3emn2sQFAzagsFJQc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13549
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 1 (01-02/2012) . - p. 16-20[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13659 - Périodique Bibliothèque principale Documentaires Disponible Equilibrium and kinetics of vegetable tanning process / Xuepin Liao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCIX, N° 5 (05/2004)
PermalinkEvaluation 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)
PermalinkEvaluation 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)
PermalinkExperimental and computational fluid dynamics investigation on tanning process in a rotating drum / Yirui Lin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 11 (11/2023)
PermalinkFabrication, characterization and tanning performances investigation of a novel epoxide / Xiaoyan Pang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
PermalinkFabrication of highly hydrophobic paper by coating with modified collagen hydrolysate / Yaohui You in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 2 (03-04/2014)
PermalinkFactors affecting mass transfer of protease in pelt during enzymatic bating process / Ying Song in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 1 (Année 2019)
PermalinkFibre-forming properties of collagen and gelatin derived from bovine limed-split waste / Wei Xiangyi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
PermalinkFlocculation behaviors of collagen protein-Al(III) composite flocculant / Ruiqin Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 2 (02/2014)
PermalinkFluorine-containing aqueous copolymer emulsion for waterproof leather / Zhaoyang Luo in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)
PermalinkFurther investigations of oxidative unhairing using hydrogen peroxide / Bi Shi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 5 (05/2003)
PermalinkGelatin - polyphenol interaction / Bi Shi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 4 (04/1994)
PermalinkHigh stability organic tanning using plant polyphenols. Part 1 / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 82, N° 2 (03-04/1998)
PermalinkHigh stability organic tanning using plant polyphenols. Part 2 / Bi Shi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)
PermalinkImprovement in leather surface hydrophobicity through low-pressure cold plasma polymerization / Ya-E Feng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 3 (03/2014)
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