By Dick Laan, Ultrasonic Flow Product Manager, and Rick Lowrie, Water & Wastewater Industry Manager, KROHNE, Inc.
As interest in biogas grows, more attention is being paid to measuring biogas flow, which has long been a problem area in process measuring technology. High water and carbon dioxide (CO2) content make biogas a demanding medium and a difficult measuring task, but a new generation of ultrasonic flowmeters makes biogas measurements stable and manageable. Among them is the OPTISONIC 7300, developed by KROHNE, Inc., which uses the time transit differential method to guarantees flow measurement with a high degree of long term stability regardless of the gas composition.
Biogas energy sources on the rise
According to the US Biogas Council, the US has about 2,000 sites producing biogas, with another 12,000 called ripe for development. Biogas is being promoted in the US as an alternative to conventional fuels as it increases energy security and produces fewer greenhouse gas emissions, in addition to other environmental and economic benefits.