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White mustard (Sinapis alba L.) seed oil is used for cooking, food preservation, body and hair revitalization, biodiesel production, and as a diesel fuel additive and alternative biofuel. This review focuses on biodiesel production from white mustard seed oil as a feedstock. The review starts by outlining the botany and cultivation of white mustard plants, seed harvest, drying and storage, and seed oil composition and properties. This is followed by white mustard seed pretreatments (shelling, preheating, and grinding) and processing techniques for oil recovery (pressing, solvent extraction, and steam distillation) from whole seeds, ground seed or kernels, and press cake. Novel technologies, such as aqueous, enzyme-assisted aqueous, supercritical CO 2 , and ultrasound-assisted solvent extraction, are also discussed. The main part of the review considers biodiesel production from white mustard seed oil, including fuel properties and performance. The economic, environmental, social, and human health risk/toxicological impacts of white mustard-based biodiesel production and use are also discussed.

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Food production is a top priority issue, as the lack of food for the continuously growing population is becoming an increasing problem in the world and in Serbia as well. Increase of food production for humans and animals can be achieved by use of new technologies in biotechnology, i.e. in bioindustry. Nowadays, there are many different ways for thermal processing of cereals: toasting, extrusion, hydrothermal processing, micronization, microwave treatment, while in Serbia, the most frequently used processes are extrusion and hydrothermal processing. The baking industry is highly developed in Serbia. Bread consumption per capita in Serbia is far above average consumption in the EU. According to the survey conducted, there is a significant amount of leftover bread in Serbia. Leftover bread represents an environmental problem, but also a potentially valuable raw material for human food and animal feed. Key words: leftover bread, quality food, environmental protection.Bread is the most frequent product made of grains and also a basic food in many countries. It is made by mixing flour and water and certain secondary materials, which after fermentation, shaping and baking gives the final product. After being taken out of the oven, loaves have to be cooled down, and over time they become drier and their quality changes [1].One of the habits of the population in Serbia is to discard bread which is not consumed in one single day. This raises the question of quantity and quality of leftover bread and its safety for further use. The baking industry is characterized with a variety of different products that find their place on the market daily. Their quality estimate all possible generations of consumers. Stable quality of production, from a long-term point of view, is not easy to preserve. Positions on the market are hard to gain, but very easy to lose. In the case of sensitive production such as in the baking industry, in order to keep the existing positions, it is inevitable to make all possible efforts to keep the achieved levels of competence. Competence is commonly expressed over three basic factors: the quality, the time and the price. These factors commonly represent basic main criteria that determine the consumer's preferences for definite products [1].

The present paper reviews the environmental aspects of the production and use of corn oil-based biodiesel. The environmental aspects are analyzed by considering the used-corn oily feedstocks and production technology. Besides that, the possibilities for the improvement of the biodiesel production process are emphasized. The most valuable corn-oil feedstocks are waste corn oil and corn distillers oil obtained primarily from dried distillers grains with solubles (DDGS). The use of DDGS, a by-product of ethanol production, for biodiesel production and glycerol, a by-product of biodiesel production, as a substrate for ethanol production, allows the development of an integrated ethanol/biodiesel production and contributes to the elimination or minimization of wastes and the production of the added-value products. Biodiesel is a degradable, less-toxic, safe, and generally, clean-burning fuel with exception of NOx emission that can be reduced by the appropriate methods but further investigations are desirable. Key words: corn oil, biodiesel, environmental aspect, ghd emission, pollution