Experimental research concerning the possibility of the cow manure conversion into biogas

Abstract

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.