En este trabajo se presenta el estudio hidrodinámico de un biorreactor de leche escurrido (BLE) en función del flujo másico superficial del líquido y de la disminución de la fracción vacía del lecho debido al crecimiento de biopelícula, utilizando isopropanol como sustrato modelo. Se obtuvo una capacidad de eliminación del...
Megasphaera elsu’enii is the main lactate-utilizing species in the rumen and has been considered one of the most important ruminal microorganisms. It is able to ferment up to 97% of the rumen lactate. Lactate removal is important in rumen ecology, because its accumulation causes dysfbnction such as reduced salivation, redistribution...
The purpose of the present study was to compare the productivity of a fungal enzyme, invertase (sucrase o 13 fructo-furanosidase EC3.2.1.26) of Aspergillus niger grown in solid state fermentation (SSF) and submerged fermentation (SmF). Poliurethane foam was used as inert support in SSF experiments. One of the objectives was to...
La producción de enzimas por microorganisrnos ha tomado en los últimos dos una gran importancia debido a la facultad de algunas bacterias y hongos filamentosos de producir mimas de importancia industrial. La enzima invertasa ha sido estudiada principalmente en levaduras y en algunas especies de hongos filamentosos ( AspergiZlus nialarlmts...
En este trabajo se estudiaron los patrones de producción de ácido cítrico por Aspergillus niger 10 en fermentación en estado sólido (FES) utilizando espuma de poliuretano (PUF) como soporte. Los resultados obtenidos demuestran que la acumulación de ácido cítrico en FES no depende de la presencia del glicerol producido en...
The combined effect of sucrose concentration and support moisture content, and the increment in carbon dioxide atmosphere on the production of invertase (β fructo-furanoside EC 3.2.1.26) was evaluated. The Aspergillus niger C28B25 strain and polyurethane foam as inert support were used in this study. The effect of sucrose concentration as...
Se han observado buenos resultados de producción de cefalosporina C (CPC) en fermentación sólida (FS) de una fase soporte-substrato (como salvado de trigo) utilizando Acremonium chrysogenum C10 como microorganismo productor. En esta tesis se presenta el trabajo realizado para establecer condiciones de producción de CPC en FS de dos fases...
Nowadays an environmental problem is the contamination of the water that is given by the limitless population growth, an intensive agricultural practice and a high industrial activity. A feasible proposal for the treatment of the wastewater that contain nitrogen in nitrate form and organic matter of different kinds is the...
In this study, the effect of inoculation (bioaugmentation), nutrients (biostimulation), and oxygen releasing materials (ORM) were evaluated on hydrocarbons biodegradation of drilling and mud cuts, using soil columns or lysimeters as study model. The use of CaO2, 0.1% (w/w) like chemical oxygenante was determined by microcosm experiment test. Inoculums of...
In the present work was evaluated the capacity of Aspergillus terreus, Aspergillus niger and Phanerochaete chrysosporium to biodegrade high concentrations of benzo(a)pyrene (BaP) in solid culture on polyurethane foam as matrix. The three filamentous fungi studied were able to biodegrade 0.5 mg BaP (g dry matrix)-1. The presence of glucose...