Measuring Methane-Based Digester Gas Flow In Wastewater Treatment Plants

Wastewater treatment digester gas systems, as well as other biogas applications such as landfills, are challenged by wide flow variations, dirty and wet gas, and a potentially explosive gas. Flow rates can vary from low production in start-up phases to much higher flows as the process matures and with seasonal and population changes. These dynamic process variables make accurate and repeatable gas flow measurement a challenge that can be met using thermal dispersion type mass flowmeters.