0016-2361/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.fuel.2012.03.031 ⇑ Corresponding author. Tel.: +60 16 590 3110; fax E-mail address: [email protected] (H.C. Ong). Increased biodiesel production is being proposed as one solution to the need to ease the impact of increased demand for crude oil and to reduce emissions of greenhouse gases. Despite this, biodiesel has ye...

The production of biodiesel from waste vegetable oil offers a triple-facet solution: economic, environmental and waste management. The new process technologies developed during the last years made it possible to produce biodiesel from recycled frying oils comparable in quality to that of virgin vegetable oil biodiesel with an added attractive advantage of being lower in price. Thus, biodiesel p...

The utilization of fermentation media derived from waste and by-product streams from biodiesel and confectionery industries could lead to highly efficient production of bacterial cellulose. Batch fermentations with the bacterial strain Komagataeibacter sucrofermentans DSM (Deutsche Sammlung von Mikroorganismen) 15973 were initially carried out in synthetic media using commercial sugars and crud...

Biodiesel consists of monoalkyl esters of long chain fatty acids. It is produced from vegetable oils or fats either by chemical transesterification with methanol or ethanol. The cost of lipases and the relatively slower reaction rate remain as the major obstacles for enzymatic production of biodiesel as opposed to the conventional chemical processes. The enzymatic process offers several advanta...

Biodiesel as a promising alternative energy resource has been a hot spot in chemical engineering nowadays, but there is also an argument about the sustainability of biodiesel. In order to analyze the sustainability of biodiesel production systems and select the most sustainable scenario, various kinds of crop-based biodiesel including soybean-, rapeseed-, sunflower-, jatropha- and palm-based bi...

Microalgae-derived biodiesel has been regarded as a promising alternative for fossil diesel. However, the commercial production of microalgal biodiesel was halted due to its high cost. Here, we presented a pilot study on the industrial production of algal biodiesel. We began with the heterotrophic cultivation of Auxenochlorella protothecoides in a 60-m(3) fermentor that produced biomass at 3.81...

Biodiesel or fatty acids alkyl esters (FAAE) of long chain are an alternative fuel produced by a transesterification process. The potential production of biodiesel from rapeseed oil in Chile is associated to the solution of economic, environmental and social problems. Experiences from other countries have demonstrated that biodiesel prices are higher than diesel, due to the high costs of the ra...

BACKGROUND Wax ester synthases (WSs) can synthesize wax esters from alcohols and fatty acyl coenzyme A thioesters. The knowledge of the preferred substrates for each WS allows the use of yeast cells for the production of wax esters that are high-value materials and can be used in a variety of industrial applications. The products of WSs include fatty acid ethyl esters, which can be directly use...

Biodiesel production may provide a sustainable route to reduce environmental pollution caused by fossil fuel consumption. In order to minimize environmental impacts of biodiesel production, the chemical process should be optimized to minimize waste generation and energy consumption. Therefore, it is important to design biodiesel chemical reactions and processes using green chemistry and green e...

This paper presents emergy assessment of biodiesel production in Brazil using conventional, organic and agroecological grown soybean. For the conventional soybean biodiesel the indicators are: Transformity: 5.05E+05 seJ J; Renewability: 24.1%; Emergy yield ratio: 1.40; Environmental loading ratio: 3.15. These values indicate high demand of non renewable resources and low sustainability degree, ...