Chemical inhibition of the contaminant Lactobacillus fermentum from distilleries producing fuel bioethanol
AUTOR(ES)
Oliva Neto, Pedro de, Lima, Fabíola Aliaga de, Silva, Ketrin Cristina da, Silva, Douglas Fernandes da, Carvalho, Ana Flavia Azevedo, Santos, Catarina dos
FONTE
Braz. arch. biol. technol.
DATA DE PUBLICAÇÃO
2014-06
RESUMO
The purpose of this study was to determine the Minimum Inhibitory Concentration (MIC) of pure or mixed chemicals for Saccharomyces cerevisiae and Lactobacillus fermentum in the samples isolated from distilleries with serious bacterial contamination problems. The biocides, which showed the best results were: 3,4,4' trichlorocarbanilide (TCC), tested at pH 4.0 (MIC = 3.12 mg/l), TCC with benzethonium chloride (CBe) at pH 6.0 (MIC = 3.12 mg/l) and TCC mixed with benzalkonium chloride (CBa) at pH 6.0 (MIC = 1.53 mg /l). If CBa was used in sugar cane milling in 1:1 ratio with TCC, a 8 times reduction of CBa was possible. This formulation also should be tested in fermentation steps since it was more difficult for the bacterium to develop resistance to biocide. There was no inhibition of S. cerevisiae and there were only antibiotics as an option to bacterial control of fuel ethanol fermentation by S. cerevisiae.
Documentos Relacionados
- Lysis of modified walls from Lactobacillus fermentum.
- Identification of Lactobacillus plantarum, Lactobacillus pentosus and Lactobacillus fermentum from honey stomach of honeybee
- Protoplast fusion of Lactobacillus fermentum.
- Characteristics of the adhesive determinants of Lactobacillus fermentum 104.
- Synthesis of nitric oxide from the two equivalent guanidino nitrogens of L-arginine by Lactobacillus fermentum.