title: Novel bioflocculant produced by salt-tolerant, alkaliphilic strain Oceanobacillus polygoni HG6 and its application in tannery wastewater treatment.
abstract: The optimized production of MBF-HG6, which is a novel salt-tolerant alkaliphilic bioflocculant produced by Oceanobacillus polygoni with its application in tannery wastewater treatment was investigated in this study. It was found the optimal carbon source, nitrogen source, cation, and initial pH of the medium for bioflocculant production were starch, urea, Fe2+, and pH 9.0, respectively. The best stability in the temperature range was from 0 to 80°C and the purified MBF-HG6 contained polysaccharides of 81.53% and proteins of 9.98%. The carboxyl, hydroxyl, and amino groups were determined in bioflocculants, while the optimized bioflocculating activity was observed as 90.25% for the dosages of 6.96mL MBF-HG6, 4.77mL CaCl2(1%, m/v), and 19.24g/L NaCl using response surface methodology. In addition, SS and turbidity removal rates of the tannery wastewater (4g/L MBF-HG6) could, respectively, reach 46.49% and 91.08%, indicating that the great potential was emerged in enhancement of tannery wastewater treatment by MBF-HG6.
authors.affiliation: a School of Civil Engineering , Inner Mongolia University of Technology , Hohhot , China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: a School of Civil Engineering , Inner Mongolia University of Technology , Hohhot , China.
authors.forename: Yue-Qing
authors.initials: YQ
authors.lastname: Yun
authors.affiliation: a School of Civil Engineering , Inner Mongolia University of Technology , Hohhot , China.
authors.forename: Li
authors.initials: L
authors.lastname: Xing
authors.affiliation: a School of Civil Engineering , Inner Mongolia University of Technology , Hohhot , China.
authors.forename: Lei
authors.initials: L
authors.lastname: Song
mesh_terms: D000468:Alkalies / Q000494:pharmacology*; D001406:Bacillaceae / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism*; D002244:Carbon / Q000378:metabolism; D005285:Fermentation; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D009584:Nitrogen / Q000378:metabolism; D012492:Salts / Q000494:pharmacology*; D013696:Temperature; D018505:Waste Management / Q000379:methods*; D062065:Wastewater / Q000382:microbiology*
chemical_list: D000468:Alkalies; D002244:Carbon; D007220:Industrial Waste; D009584:Nitrogen; D012492:Salts; D062065:Wastewater
keywords: Oceanobacillus polygoni; RSM; bioflocculant; flocculating activity; tannery wastewater