BAUER GRU™

Product Description

BAUER GRU™: Biogas Recovery Compressors For Injection Into PSA or Membrane Gas Conditioning Systems

The BAUER GRU™ Biogas Recovery Compressor range has been specifically designed for methane recovery and conditioning in biogas applications. The function of the biogas recovery compressor is to elevate the pressure of the incoming biogas from 1-7 PSIG (typical) to 90 – 230 PSIG which is the operating pressure requirement for most PSA/Membrane type gas conditioning systems. BAUER offers a complete GRU™ system size range from 10 HP to 750 HP (7.5-560KW).

At the heart of every GRU™ vapor recovery system is the legendary BAUER Rotorcomp® rotary screw compressor which is world-renowned for exceptional durability and reliability. The GRU™’s sophisticated control system senses pressure upstream of the unit and automatically adjusts compressor speed to modulate compressor output based on the availability of methane gas from the source (landfill or digester).

If there is an insufficient amount of gas available upstream for compression, the system automatically goes into standby mode for instantaneous compression capability when upstream gas pressure suddenly increases. This significantly reduces the occurrences of venting gas into the atmosphere because the compressor is ready to operate instantaneously vs. ramping up through normal start-up sequences after being completely shut down.

The most comprehensive size and performance range in the industry

BAUER offers 8 different sizes and models of biogas recovery compressors ranging from 10 – 750 HP (7.5 – 560 KW). This allows BAUER to size the compressor system specific to the performance needs of each project.

Inlet pressure range: 0.1 – 36 PSIG (0.007 – 2.5 BAR)
Horsepower range: 10 – 750 HP (7.5 – 560 kW)
Biogas Flow Rate: 15 – 2333 SCFM (24 to 3756 Nm3/h)
Final Pressure: 90 – 230 PSIG (6.2 – 15.58 BAR)

Standard scope of supply

Heavy-duty rotary screw compressor manufactured by BAUER’s Rotorcomp® division at the heart of the system
Variable speed control of compressor to modulate the flow of biogas based on the incoming supply of gas (VF drive located remote from skid as defined by Class 1, Div 2 code requirements per NEC NFPA70
Heavy-duty TEFC electric motor
Stainless steel construction of piping and major P&ID components
PLC control of all major system components
BAUER CONNECT® remote telemetry IoT with Modbus TCP/IP or Profinet connection capability
Fully integrated system built on a heavy-duty steel skid designed for plug and play installation

Available options include

Gas inlet particulate filter
Gas aftercooler (air-cooled)
Heavy-duty weatherproof enclosure
Sound attenuation
Passivation of piping
Ultrasonic testing of piping welds 100% material NDE traceability for process components)