دانلود رایگان مقاله انگلیسی تولید بیوسورفکتانت از ضایعات صنعتی با حذف بالقوه رنگ نامحلول - نشریه الزویر

ABSTRACT

Biosurfactants are amphipathic compounds formed by a hydrophilic and hydrophobic component, this characteristic confers to these compounds the possibility of several applications. The aim of this study was to produce biosurfactants from different industrials wastes using Corynebacterium aquaticum and Corynebacterium spp. CCT 1968 and study the application in paint removal. The production of biosurfactants was evaluated through surface tension, emulsifying activity and character ionic. The analyses were carried out at 0, 24, 48 h. The biosurfactants that presented lower surface tension and higher emulsifying activity were applied in insoluble paint. The microorganism Corynebacterium aquaticum showed efficient biosurfactant production when using fish and bagasse residues as carbon source. The surface tension obtained for these treatments was 27.8 and 33.9 mN/ m and emulsifying capacity was 87.6 and 61.6%, respectively. The Corynebacterium spp. CCT 1968 produced biosurfactants only in the medium containing fish waste (28.5 mN/m). The biosurfactants produced by both microorganisms showed anionic character. The applied biosurfactants showed potential use in solubilization and paint removal. Therefore, the residues of fish and sugarcane bagasse showed efficient as carbon sources to obtain biosurfactants. In addition, the preliminary paint removal application presented great results that can be explored in the future.

4. Conclusion

The microorganisms Corynebacterium aquaticum and Corynebacterium spp. CTT 1968 showed efficient production of biosurfactants. Among the industrial wastes used, the fish waste and sugarcane bagasse were more efficient as carbon source for the bioproducts produced. The biosurfactants produced with these carbon sources showed surface tension reduction to values below 40 mN/m. They were also able to maintain the emulsifying activity above 50%. The petroleum sludge and glycerol were not effective in biosurfactant production. Biosurfactant extracts studied were considered with anionic character. The biosurfactants produced from sugarcane bagasse showed promising in the solubilization and paint removal.