Challenges and performance evaluation of livestock waste energy content

Abstract

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.

The Nutrient Potential of Organic Manure and Its Risk to the Environment

“…The main greenhouse gasses produced by livestock farming are: carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), and ammonia (NH3). Due to animal husbandry, the limit for carbon dioxide could be exceeded in the future, as animals naturally release CO2 (Halmaciu et al, 2022). Another problem in livestock production is the generation of manure.…”