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The global increase of the population has generated more and more requirement of the animal-based food. In order to provide this requirement, it was necessary to increase considerably the actual numbers of animals. This has led to both numerous positive and negative effects brought both to people and animals. Creating agro-touristic farms, ensuring fresh food, creating workplaces are just a part of the factors which have beneficial effects on the human beings. Yet, a major problem, which should not be ignored and neglected, is represented by the wastes resulted from animal breeding. These superficially treated wastes can cause numerous negative effects on the whole ecosystem. The animal dejections, the water resulted from the meat processing, the animal corpses, and all represent biodegradable wastes, which might be used, by transforming their energy content into electrical and thermal energy. This can be possible, for example, by using these wastes as raw material for producing biogas. To prove their efficiency in producing the biogases there have been done thermal analysis. In this article are analysed, from a thermal point of view, 3 different samples. In the first part of the experiment were analysed the swine dejections, in the second part were analysed the poultry dejections, and the third experiment consisted in the analysis of the cow stable waste. The analysis of these samples was done with the help of the Netzsch 449 C Jupiter device. The results obtained from the analysis prove the fact that all the three raw materials can be used as raw materials in producing the biogas.

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Cow manure has been used since ancient times as an organic fertilizer in agriculture. Being rich in micronutrients, especially zinc, it is suitable to be used for all types of crops. The increase in the number of inhabitants generated the need for a larger amount of food and associated ever growing need of energy supply. Thus, an increase in the number of farms and cultivated agricultural areas was necessary, as well ever-growing secure energy sources. The strict laws on waste management, on reduction of greenhouse gases emission and in general addressing the decrease of the manmade pollution are some of the reasons that have led to the developing and application of alternative energy solutions. This paper aims to shed light on another much more beneficial feature of cow dung through its modern use, by production of biogas through anaerobic digestion. The experimental work is performed on an ultra-modern laboratory installation, capable to generate in 6 separate digesters of the biogas, according todivers receipts. In order to create a favourable environment for the growth of bacteria, the digestate was kept at a temperature of 37° C, thus creating mesophilic conditions. Throughout the experiment the pH value was monitored and recorded, as well the amount of generated methane.