Many methods have been reported for the extraction of oils from microalgae, either for food, medicinal purposes and recently as feedstock to produce biofuels. For the production of biofuels such as biodiesel generally are used oilseeds which have shown to have many limitations due to the availability of land and water for cultivation, low crop yields and more so that seeds are used to food. For this reason in recent years have been studying the feasibility of the use of microalgae to produce biodiesel which can overcome the above limitations. Several authors have methodologies for extracting of different microalgae oil whose ranges of extraction are on the order of 11.2% to 22.9%.This work presents a modified (improved) oil extraction method from the microalgae Nannocloropsis oculata previously lyophilized using ultrasound treatment in a mix oforganic solvents cyclohexane-iso...

Refined vegetable oils are nowadays used not only in food but also as a raw material in the production of biodiesel, this use has generated some controversy by different factors among which also have social environmental. On the other hand, large amounts of vegetable oils are discarded after use in food and fried foods such as pollutants considered waste which can be better utilized for the production of biodiesel but has disadvantages in lower costs and yields . Therefore, was made a comparative study for the production of Biodiesel from refined vegetable oil (canola), unrefined (linseed) and recycling (canola) with ultrasound equipment. The parameters evaluated for the production of Biodiesel were yield, acid value, and refractive index. Ultrasound is a methodology considered clean for environmental sustainability. In this work, this method was compared with the traditional method for ...

Los aceites vegetales refinados son hoy en día utilizados no solo en alimentación, sino también como materia prima en la producción de biodiésel. Este uso ha generado cierta controversia por diferentes factores, entre los cuales se cuentan, además de los sociales, los ambientales. Por otro lado, se desechan grandes cantidades de aceites vegetales después de ser usados en alimentación, como en frituras, considerándose estos como residuos contaminantes que pueden ser mejor aprovechados para la producción del biodiésel, pero tienen la desventaja de que los costos y rendimientos son menores. Por lo tanto, se hizo un estudio comparativo para la producción del biodiesel a partir de aceite vegetal refinado (canola), no refinado (linaza) y reciclado (canola) con un equipo de ultrasonido. Los parámetros evaluados para la producción del biodiésel fueron rendimiento, índice de acide...