Optimisation 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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 158-163 Titre : Optimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater Type de document : texte imprimé Auteurs : Guangyu Ran, Auteur ; Zihan Zhao, Auteur ; Jinpin Dai, Auteur ; Jinwei Hu, Auteur ; Peng Yang, Auteur ; Huilin He, Auteur ; Changqing Zhao, Auteur Année de publication : 2023 Article en page(s) : p. 158-163 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidon cationique Biofloculant Eau -- Épuration -- Élimination des composés organiques Eaux usées -- Epuration Eaux usées -- Teneur en azote total Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery wastewater contains a high concentration of total nitrogen, and its direct discharge will lead to eutrophication of water bodies, thus the treatment of total nitrogen in tannery wastewater has become the focus of environmental protection. In this paper, total nitrogen removal rate in tannery wastewater was investigated as an index, and sm-A3 cationic starch was used as an initiator to optimise the modification process of flocculant produced by Bacillus cereus CZ1001. In the modification optimisation process, single-factor optimisation experiments and orthogonal optimisation experiments were conducted on the dosage of cationic starch, bioflocculant, initiator, reaction time, reaction temperature, pH and rotational speed of the reaction system. The results showed that with cationic starch (2mL) 0.3 g/L, bioflocculant (25mL) 4.5g/L, initiator (0.02mol/L) dosage 2mL, reaction time in the first stage 7.5min, reaction temperature 55°C and the reaction system pH7.0, the highest total nitrogen removal rate of 89.22% was achieved for the tannery wastewater, and finally, we produced a cationic starch modified bioflocculant with high nitrogen removal rate. This research result reduced the environmental impact of tannery wastewater and broadened the treatment pathway of tannery wastewater. Note de contenu : - EXPERIMENTAL PROCEDURE : Material and method - RESULTS AND DISCUSSION : Single-factor optimisation of modified conditions - Orthogonal optimisation of modified conditions - Table 1 : ANOVA test for second stage reaction time - Table 2 : Factor level table for preparation of cationic starch modified bioflocculant - Table 3 : Experimental design and range analysis of cationic starch modified bioflocculant - Table 4 : Analysis of variance for cationic starch modified bioflocculants En ligne : https://drive.google.com/file/d/1Ukunt4ZZUNREcNbMjL24hIny7DOLMTkU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39690 [article]

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