Renewable resources – Biogas substrate
The operator of a biogas plant was looking for a reliable pump for transferring highly abrasive biogas substrate from a fermenter to a secondary fermenter. The rotary lobe pump previously used increasingly suffered from extreme wear on the rotor. It was essential for the operator of the biogas plant to have a pump on-site with a long service life, low wear and be easy to maintain in the case of repairs. Owing to the design of the pipe line system, the pump had to be able to cope with pressure of -0.4 bar.
The customer chose a Boerger Rotary Lobe Pump. The speed of the Boerger pump is controlled by a frequency converter depending on the negative pressure. An electronic pressure gage measures the pressure.
Renewable resources – Biogas substrate
| Pump Type |
Börger Rotary Lobe Pump |
| Medium |
Renewable resources – biogas substrate |
| Rated capacity |
32 – 80 m³/h (140.8 – 352 usgpm/h) |
| Pressure |
max. 4 bar (58 psi) |
Renewable resources – Biogas substrate
Börger Rotary Lobe Pumps are self-priming , valveless, positive displacement pumps. The even rotation of the rotor pair creates a vacuum on the priming side of the pump, which can be defined by the direction of rotation of the drive. This vacuum draws the liquid into the pump chamber. With further rotation, the pumped medium is conveyed past the pump wall into the pressure area. Up to six chamber charges are displaced with each drive rotation– depending on the rotor type. When the rotor is at a standstill, the pump seals off almost completely.
To view the Börger Rotary Lobe Pumps on Thomson Process Equipment and Engineering website click here: https://www.thomsonprocess.ie/pumps/boerger-lobe-pumps/
