Analysis of the implementation of biogas plants: pluses and minuses of the thermophilic digestion

Abstract

Analysis of world practices in the implementation of biogas plants is presented for the growth energy efficiency in Russia. The object of study is biogas technologies used for the disposal of animal waste products. The subject of the study is a biogas plant for processing animal waste products, implemented in Russia. The purpose of the study is to develop a technological scheme for producing biogas for farms. The advantages of the thermophilic mode of fermentation include: an increased rate of decomposition of raw materials and, therefore, a higher biogas yield, as well as the almost complete destruction of pathogenic bacteria contained in the substrate. The disadvantages of thermophilic digestion include are the need to supply a significant amount of energy to heat the raw material in the digester and maintain its temperature, the increased sensitivity of the process to minimal temperature fluctuations and a slightly lower quality of the obtained fertilizers compared to the mesophilic regime, which maintains a higher amino acid composition of the fertilizer.