Multi-phase flow assessment for the fermentation process in mono-substrate reactor with skeleton bed

Abstract

The selected techniques were reviewed and their technological aspects were characterized in the context of multi-phase flow for biogas production. The conditions of anaerobic fermentation for pig slurry in a mono-substrate reactor with skeleton bed were analysed. The required technical and technological criteria for producing raw biogas were indicated. Design and construction of the mono-substrate model, biogas flow reactor, developed for cooperation with livestock buildings of various sizes and power from 2.5 kW to 40 kW. The installation has the form of a sealed fermentation tank filled with a skeletal deposit constituting a peculiar spatial system with regular shapes and a rough surface. Incorporating a plant in such a production cycle that enables the entire slurry stream to be directed from the cowshed or pig house underrun channels to the reactor operating in the flow mode, where anaerobic digestion will take place, allows to obtain a biogas. The paper presents preliminary results of experimental investigations in the field of hydrodynamic substrate mixing system for biogas flow assessment by the adhesive bed in the context of biogas production. The aim of the study was to assessment and shows the influence of the Reynolds number on the biogas resistance factor for the fermentation process in mono-substrate reactor with adhesive deposit. The measurement results indicate a clear effect of the Reynolds number in relation to the descending flow resistance coefficient for the adhesive bed.

Biomass Energy Technologies from Innovative Dairy Farming Systems

“…Biogas plants for a substrate of agricultural origin, including monosubstrate-based plants for animal slurry or with the prevailing slurry content, have recently been developing dynamically [27][28][29][30]. The potential for producing biogas and energy from natural fertilizers is very high [12,[31][32][33][34].…”

The Analysis of a Prototype Installation for Biogas Production from Chosen Agricultural Substrates

“…During the methane production by fermentation, biogas is produced which is discharged into the biogas tank via a pipe. Biogas is also produced when the manure ( 3) is stored in the chamber (7). Biogas is discharged from each sector via pipe (8).…”

“…The biogas production equipment includes a silo-leaching chamber (7), divided into hermetically closed sectors, in which containers (5) are filled with manure (3) and hermetically closed for a period of about 30 d. The floors in the containers (5) are openwork. An outflow ( 9) is made in the floor of each of the sectors of the chamber (7). The outflow is connected by the discharge pipe (10) directed to the organic fraction tank (11).…”

“…The outflow is connected by the discharge pipe (10) directed to the organic fraction tank (11). In this tank, the organic fraction is collected after rinsing the manure (3) contained in the containers (5) in the chamber (7).…”

“…As a result of biochemical changes in the process of anaerobic decomposition, some of this matter is mineralized to simple chemical compounds. The remaining parts, which are difficult to break down, e.g., cellulose and lignins, remain unchanged and are removed from the fermentation chamber in their original form [5][6][7][8][9][10][11][12].…”