The central mixer (agitator) is used on biogas plants for mixing substrates with low-viscosity media with a dry matter content of up to 12%. One of its main features is that feeding taking place at the center of the reactor’s roof. The mixer construction consists of a geared motor installed outside the tank and a long shaft attached to it inside the tank. The blades are mounted on the shaft. The mixer design allows the possibility of servicing the motor without stopping the processes in the biogas reactor, low energy consumption and the fact that it creates an optimal heat and mass exchange in the reactor.

The central mixer (agitator) PG 180 VS is suitable for steel tanks with volume range from 1000 and up to 10000 m³. The range of motor power can be selected depending on the requirements from 7.5 kW to 75 kW. The mixer is isolated from the atmosphere through a water seal with integrated level control. The mixer is designed to work in the aggressive environment of a biogas reactor and has ATEX certificates. It refers to low-speed mixers and has rotation speed range from 14 to 19 rpm.