Los microorganismos tienen una amplia versatilidad bioquímica; juegan un papel importante en el ambiente debido a que reciclan la materia a través de los ciclos biogeoquímicos. Esta capacidad ha sido explotada en el manejo del impacto ambiental desde hace varios años, gracias a las tecnologías de biorremediación, las cuales se han perfilado en todo el mundo como una alternativa muy atractiva para la limpieza de suelos y ambientes acuíferos contaminados.La ventaja más importante de la biorremediación es que los contaminantes orgánicos pueden ser realmente transformados y algunos de ellos completamente mineralizados. Comparada con otras tecnologías, la biorremediación es segura y económica, ya que después del tratamiento los suelos pueden ser reutilizados para el crecimiento de plantas.Un gran número de tecnologías de biorremediación y productos microbianos que han sido ap...

Industrial effluent treatment requires highly polluting alternatives designed to lower costs and greater feasibility for adoption by the respective industrial sector. Enzymatic bioconversion of lignocellulosic waste constitutes a promising alternative for the decontamination of such effluents on behalf of our ecosystems. The immobilization of microorganisms in industrial biotechnological production of enzymes is an increase in production, ease of unit operations and reduced costs. The search for new culture media for biotechnology products desired as cellulase is also vital to raise the level of production of these compounds. The objectives were immobilized spores and assessing the production of cellulases in different culture media based on sugarcane bagasse. Agar was used to immobilize the 2, 4 and 6% as carriers. The addition of the microorganism was carried out in the form of spores ...

Industrial effluent treatment requires highly polluting alternatives designed to lower costs and greater feasibility for adoption by the respective industrial sector. Enzymatic bioconversion of lignocellulosic waste constitutes a promising alternative for the decontamination of such effluents on behalf of our ecosystems. The immobilization of microorganisms in industrial biotechnological production of enzymes is an increase in production, ease of unit operations and reduced costs. The search for new culture media for biotechnology products desired as cellulase is also vital to raise the level of production of these compounds. The objectives were immobilized spores and assessing the production of cellulases in different culture media based on sugarcane bagasse. Agar was used to immobilize the 2, 4 and 6% as carriers. The addition of the microorganism was carried out in the form of spores ...

The correlactionship of bacterial population and oxidation-reduction potential in the bioleaching of sulfuric minerals by bacterial strain of Aciditiobacilus Ferrooxidans isolated from acid mine effluent was studied. The solubilization of copper and gold release from a mineral with sulphides exceeding 80% was evaluated. The experimental variables were: Pulp density at 1, 2 and 6% (W/V), concentration of ferrous sulfate as part of the 9k medium of 0, 3, 6, 9 and 15 gr/L.; maintaining constant temperature and pH. The tests were carried out in three consecutive stages, starting with inoculum containing 7.05x107 Cell/mL and then the one obtained in each previous stage, observing the variation in the periods of adaptation and growth. In the first stage the maximum bacterial density reached in 24 days was 4.75x107 Cell/mL with 6 g/L of ferrous sulfate. In the second stage a maximum density of ...

The study was carried out with isolated strains of acid drainage and consisted of processing of highly mineralized copper sulphides that mainly contained 45.30% pyrite and 13.12% arsenopyrite. Bioleaching was carried out in 500 ml flasks, where 300 ml of 9k medium, 30 ml of bacterial inoculum (10% V / V) of 7.05x107 Cell / ml and various amounts of FeSO4.7H2O were added. The pH was regulated to 1.8 and they were subjected to platform agitation with 150 RPM at ambient temperature of 20 ° C on average. The tests were carried out in three successive stages at different concentrations of ferrous salt. In the first stage, 72.64% copper was obtained with 6 g / l of FeSO4.7H2O in 22 days. In the second stage, 85.6% of copper was achieved in the absence of the ferrous salt. Greater bacterial growth was also achieved with 15 g / l FeSO4.7H2O and 25.62% copper recovery in 24 days of leaching; In ...

The study was carried out with isolated strains of acid drainage and consisted of processing of highly mineralized copper sulphides that mainly contained 45.30% pyrite and 13.12% arsenopyrite. Bioleaching was carried out in 500 ml flasks, where 300 ml of 9k medium, 30 ml of bacterial inoculum (10% V / V) of 7.05x107 Cell / ml and various amounts of FeSO4.7H2O were added. The pH was regulated to 1.8 and they were subjected to platform agitation with 150 RPM at ambient temperature of 20 ° C on average. The tests were carried out in three successive stages at different concentrations of ferrous salt. In the first stage, 72.64% copper was obtained with 6 g / l of FeSO4.7H2O in 22 days. In the second stage, 85.6% of copper was achieved in the absence of the ferrous salt. Greater bacterial growth was also achieved with 15 g / l FeSO4.7H2O and 25.62% copper recovery in 24 days of leaching; In ...