Bacterial Culture in Anaerobic Medium

The terms anaerobic fermentation, anaerobic digestion, or methanization refer to the transformation of organic compounds into methane and carbon dioxide under the action of microorganisms. The apparatus essentially consists of a methanization reactor mounted on a chassis, along with its storage, control, and measurement components. Educational Objectives: Hydrodynamic study of a liquid-solid fluidized bed, study of anaerobic fermentation in a fluidized bed, study of COD elimination efficiency as a function of volumetric load and residence time, study of biogas composition as a function of organic load, pressure drop study. Learn about Bacterial Culture in Anaerobic Medium specifications for optimal educational outcomes..

This transformation of organic matter into biogas is carried out by complex bacterial populations under specific environmental conditions (strictly anaerobic medium, redox potential around -250 mV, pH near neutrality). Anaerobic fermentation is primarily applied to the treatment of activated sludge from aerobic treatment of urban wastewater, and to the treatment of industrial wastewater containing high concentrations of easily biodegradable compounds (food industries).

Wastewater feed tank
PVC wastewater feed piping to the reactor
PVC reagent feed piping to the reactor
316L stainless steel cylindrical column methanization reactor comprising: lower dome for wastewater and reagent feed (stainless steel), perforated PVC packing support grid, granular packing for bacterial bed support, stainless steel packing to prevent mechanical entrainment, PVC upper compartment separation grid, upper dome (stainless steel) for liquid-gas separation and sampling, secondary decanter for sludge recycling, 316L stainless steel effluent overflow weir, biogas withdrawal piping, sludge recycling piping with ball valves
Decanter
304L stainless steel square-tube support structure with aluminum clamping nuts
Temperature probe
Variable-speed wastewater feed pump
Variable-speed reagent feed pump
Variable-speed liquid recycling pump
Temperature regulator with measurement and setpoint display
Timers for reagent feed, recycling, and wastewater feed cycles
Reactor heating cable and thermal insulation
pH measurement probe with transmitter
Redox potential measurement probe with transmitter