Medium 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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 3 (05-06/2017) . - p. 129-134 Titre : Medium optimisation for bioflocculant produced from bacillus cereus Type de document : texte imprimé Auteurs : Changqing Zhao, Auteur ; Che Chun, Auteur ; Yang Qinhuan, Auteur Année de publication : 2017 Article en page(s) : p. 129-134 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biomatériaux Eaux usées -- Epuration Floculant Floculation Sels Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper further investigated a previous study that discovered a strain of Bacillus camus with a flocculation effect. Based on the initial medium, single-factor experiments were carried out to optimise the carbon and nitrogen sources and their concentrations. Inorganic salts with differing concentrations were successively tested through single factor, orthogonal, and composite experiments, from which an optimal medium recipe was determined with the highest flocculation activity. Next, the flocculation activity and yield of the bioflocculant were compared between the optimal medium and the initial medium. The results showed that 40g/L mannitol was the optimal carbon source, and 4g/1._ peptone was the optimal nitrogen source, white 0.75g/L l<21-1PO4 was the highest amongst the inorganic salts. Considering the carbon sources, nitrogen sources, and inorganic salts, the optimal medium with the highest flocculation activity was 40g/L mannitol, 4g/L peptone, and 0.75g/L K2HPO4. It was found that the optimal medium increased the yiefd of the bioflocculant produced by Bacillus cereus by 189.70% and the flocculation activity by 58.87%, which was a significant improvement. These experimental results are of great importance in increasing the efficiency of wastewater treatment and reducing the cost of bioflocculant. Note de contenu : - MATERIALS AND METHODS : Experimental strains and media - Strain inoculation - Determination of flocculation - Single factor optimisation of carbon source - Single factor optimisation of the nitrogen source - Optimisation of inorganic salts - Comparison of the effects of the optimised and the initial medium - RESULTS AND DISCUSSION : Optimisation of carbon source - Optimisation of nitrogen source - Optimisation of inorganic salts - Comparison of the effects of the initial medium and the optimised medium En ligne : https://drive.google.com/file/d/1IYo2vy4BMYcJJGVtu2m_ZLhW1jwDa0yH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28797 [article]

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