Figure 5. Fluidized bed digester (a) upflow, (b) downflow, (c) reverse turbulent bed

From

State of the Art of Bioreactor Technology and Mathematical Dimensioning Equations for Biogas Production

Haroun Ali Adannou, Barka Ibrahim Mahamat

American Journal of Materials Science and Engineering. 2025, 13(1), 1-8 doi:10.12691/ajmse-13-1-1