A unit for biogas production in anaerobic digestion
The BIO-ROXX pump module accelerates the fermentation process and increases biogas yield by mixing solid and liquid phases to prepare the ideal inoculum, limiting air introduction to a minimum and removing solid bodies such as stones. Installed downstream of the dry substrate hopper and the liquid feeder and before the fermenter, the BIO-ROXX delivers a homogeneous substrate that increases the decomposition rate in anaerobic digestion plants and speeds up gas production. Ideal for plant sizes of 1-10 MW, the BIO-ROXX features a sealed mixing chamber combined with a discharge pump below the fill line, so no air can enter. The configuration of the mixing rods and blades inside the chamber ensures that organic solids are evenly suspended and diluted, enabling the anaerobic bacteria to convert the organic materials to biogas. The mixing process enhances the efficiency of the fermenter by reducing viscosity and preventing the formation of a ‘float’ layer, which occurs when larger, fibrous solids accumulate as a crust on top. BIO-ROXX can process organic materials from a wide variety of sources, including straw, maize stalks, whole-crop silage, manure and food waste. — Wangen Pumps, Wangen im Allgäu, Germany