[article]
| 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 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 158-163
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Optimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)
