Development of a method for calculating a anaerobic digester with bubbling mixing

Abstract

Currently, there is a development of biogas technologies designed to obtain an alternative source of biogas energy and utilize organic waste. When developing and designing biogas plants, an important task is to determine the design and technological parameters of the anaerobic digester in order to obtain the maximum biogas yield. For the research, an anaerobic digester equipped with a bubbling mixing system was used. The bubble tube is made in the form of a spiral and forms a cone with the base downward. A calculation method has been developed that makes it possible to determine the physical and chemical properties of the biomass, the geometric parameters of the digester, the specific and total volume of biogas produced, the design parameters of the digester heating system, the design and technological parameters of the bubbling-type mixing system. With the help of the developed methodology, the design and technological parameters of the anaerobic digester of the biogas station for the disposal of organic waste from a pig breeding enterprise and a meat processing plant were determined. As a result of calculations, it was established that the station contains 3 anaerobic digester tanks with a volume of 200 m3 each, utilizes 40 m3 of waste per day and produces 1600 m3 of biogas per day.