Production and characteristics of a bioflocculant produced by Bacillus sp. F19

Studies on Bioflocculant Production by Bacillus sp. AEMREG7

“…Our findings were in accordance with many previous studies that reported several bacterial strains closely related to the genus Bacillus that have been explored in bioflocculant production [1,12,27,29,[33][34][35]. However, no report in literature has explored the location of Bacillus sp.…”

“…Similar trends were observed by Gong et al [21], Elkady et al [29], and Ugbenyen et al [59], with bioflocculants produced by Serratia ficaria, Bacillus mojavensis strain 32A, and Cobetia sp., which attained maximum flocculating activity at 72 h, after which flocculating activity declined with cultivation time. Contrary to the above, Zheng et al [35] found that the production of bioflocculant by Bacillus sp. F19 increases with an increase in cultivation time with the maximum flocculating activity reached after 36 h. In the findings of Gao et al [13], the flocculating activity of the bioflocculant produced by Vagococcus sp.…”

“…3 shows that pH 6 and 7 were more favourable for MBF-UFH production with the highest flocculating activity observed at pH 6. It has been well established in several studies that the initial pH of the production medium greatly influences bioflocculant production as it determines the electric charge of the cells and redox potential, which affects nutrient absorption as well as influencing the rate of enzymatic reaction [35,48]. Similarly, Noghabi et al [36] found that the production of extracellular biopolymer by Pseudomonas fluorescens BM07 was favourable between pH 6-8.…”

Assessment of Bacillus pumilus Isolated from Fresh Water Milieu for Bioflocculant Production

“…The divalent cation Mn 2+ demonstrated the highest flocculating activity (96.5%) for the purified bioflocculant when compared with all the other cations tested (Figure 12). The synergistic effect of cations was optimal with Mn 2+ , which showed that it helps to neutralize negative charges on the bioflocculant and the suspended kaolin particles, shortening the distance between them, increasing the initial adsorption of the bioflocculant onto the kaolin particle and thus leading to floc formation and sedimentation [57,71]. Increasing the number of valence ions in suspension increases the ionic strength, which in turn decreases the electrostatic repulsive forces among bioflocculant charged groups.…”

Production and characteristics of bioflocculant TPT-1 from a consortium of Bacillus pumilus JX860616 and Alcaligenes faecalis HCB2

“…The revealed functional groups were the major adsorptive forces of TPT -1 and were perceived to have been involved in flocculating activity of the bioflocculant (Wang et al, 2011). The results also suggest that the functional groups were the binding sites for Ba 2+ , permitting an enhanced flocculation process (Zheng et al, 2008).…”