Analyses of nitrogen metabolism functional microbial community in aerobic tanks of hydrolysis acidification and multistage aerobic process for tannery wastewater / Ding Shaolan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 12 (12/2018) . - p. 409-417 Titre : Analyses of nitrogen metabolism functional microbial community in aerobic tanks of hydrolysis acidification and multistage aerobic process for tannery wastewater Type de document : texte imprimé Auteurs : Ding Shaolan, Auteur ; Tian Qianqian, Auteur ; Cao Kai ; Li Hua ; Yang Jianjun Année de publication : 2018 Article en page(s) : p. 409-417 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eaux usées -- Analyse Eaux usées -- Décontamination Hydrolyse Microbiologie industrielle Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The actual tannery wastewater was treated by hydrolysis acidification and multistage aerobic process (A/O3). The growth status of microorganisms in three aerobic tanks was measured with the Biolog microplate method to reflect the ability of metabolizing nitrogen source. In the three aerobic tanks, the functional differences between different nitrogen source metabolism microbial communities in three aerobic tanks were compared and analyzed. The results of the present study have shown that when the concentrations of ammonium chloride and potassium nitrate were low, the metabolic activity of nitrifying bacteria was higher than that of denitrifying bacteria in aerobic tanks. With the increase of concentration of ammonium chloride and potassium nitrate, the metabolic activity of denitrifying bacteria was gradually increased, and gradually higher than that of the nitrifying bacteria metabolism. When the concentrations of ammonium chloride and potassium nitrate were 100 mg/L and 20 mg/L, and the concentrations of ammonium chloride and potassium nitrate were 150 mg/L and 30 mg/L, O1 has the best denitrification effect. However, when the concentrations of ammonium chloride and potassium nitrate were increased, nitrogen load was increased, the denitrification effects of nitrification and denitrifying microorganisms were fluctuated. And the diversity index analyses by five indexes showed that the metabolic capacity of microorganisms to carbon sources is good. Note de contenu : - MATERIALS AND METHODS : Chemicals - Experimental equipment - BIOLOG experimental method - Data analyses - RESULTS AND DISCUSSION : Community analyses of nitrogen metabolism microorganisms in O3 - Functional microbial community analyses based on carbon source metabolism in activated sludge - Analyses of carbon metabolism characteristics of microorganisms in O3 En ligne : https://drive.google.com/file/d/1hwGiqo4g-BvZYsppBVMikxxE57zXlOF7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31401 [article]

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A reliable method to determine sulfide in tannery effluent / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 1 (01-02/2007) . - p. 21-24 Titre : A reliable method to determine sulfide in tannery effluent Type de document : texte imprimé Auteurs : Xie Yonghong, Auteur ; Zhang Xinshen, Auteur ; Wang Wenxian, Auteur ; Li Hua, Auteur ; Yuan Dong, Auteur ; Huang Jin, Auteur Année de publication : 2007 Article en page(s) : p. 21-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse par injection en flux continu L’analyse par injection en flux continu (Flow Injection Analysis FIA) consiste, dans son principe le plus simple, en l’injection d’un petit volume (µL) d’une solution échantillon dans un fluide en mouvement ; ce liquide transporteur, qui se déplace de façon continue, n’est pas segmenté, et la zone formée par l’injection répétée de l’échantillon est ainsi transportée vers un détecteur afin d’enregistrer les variations d’un paramètre physique ou physico-chimique caractéristique de l’échantillon ou, le plus souvent, de l’un de ses éléments constitutifs. Chimie -- Essais et réactifs Eaux usées -- Analyse Eaux usées -- Teneur en sulfures Solutions (chimie) Spectrophotométrie Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A rapid, reliable and sensitive online method was proposed to determine sulfide ion in tannery effluent based on the combination of methylene blue spectrophotometry and automatic reference Flow Injection Analysis. In acidic media with Fe3+, without any process of H2S absorption or sample pre-distillation, sulfide could be determined directly by the automatic reference FIA function of an automatic metallic elements analyzer using p-aminodimethylaniline dimethylaniline (C6H4•NH2•N (CH3)2•2HCl) as colour developing reagent. Under the optimal conditions, the linear ranges of this method were 0.01 - 0.25 and 0.20 - 2.16µg/ml; the detection limit was 4.642ng/ml, and relative standard deviations were 2.5% (n = 8) for a 3 x diluted tannery effluent. Asatisfied result was achieved with the proposed method to determine the sulfide in tannery effluent, and then the range of recovery percentages was 96.0 - 104.0%. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemical reagents - Apparatus - Preparation of solutions - ANALYTICAL PROCEDURE : Preparation of the samples - RESULTS AND DISCUSSION : Choice of the detection wavelength - Choice of pump tubes - Choice of the reaction coil - Choice of the flow path - Choice of sampling volume - Optimizing of Reagent solution - Test of linearity, precision and detection limit - Effects of foreign ions - Analysis of the samples - Table 1 : Linearity and detection limit of the method En ligne : https://drive.google.com/file/d/1eGz7yIy-5m839V4Is2EOmzfbnLrledKb/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39043 [article]

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