Function of the EGSB Reactor
EGSB” stands for “Expanded Granular Sludge Bed”. The ANAFIT®.AC reactor works as an anaerobic reactor with a high content of granules. Its performance makes it particularly ideal for larger amounts of wastewater with high COD loads.
The EGSB methane gas reactor used by H+E operates in two stages. The two buffer stages create a controlled flow throughout the reactor area that is supported by an external recirculation. To set the desired reaction in motion, methane bacteria in the form of pellets are used in the reactor.
The wastewater is evenly distributed over the bottom of the reactor through an inlet system and then flows through a bed of granular anaerobic biomass. The pellets, with a diameter of two to four millimeters, subsequently develop by themselves. The anaerobic bacteria in the pellets convert the dissolved carbon in the wastewater into biogas, and the reactor quickly reaches its full capacity. The multistage reactor design is specifically adapted to a high content of pellets. This allows for stable removal performance even at peak times. Unpleasant odour emissions are prevented by a closed construction.
The high efficiency of the entire process technology results in an abundant discharge of valuable biogas that can be used for energy. In addition, consistently only a small amount of excess sludge accrues – mostly in the form of pellets, which can be sold.