BIOGAS
Biomethane plant in Berlin-Wisconsin upgrades biogas with 4000 ppm hydrogen sulfide to biomethane without pre- desulfurization .
UGS installs biogas upgrading system
Text and images by Unconventional
Gas Solutions ( UGS )
Biomethane plant in Berlin-Wisconsin
Unconventional Gas Solutions ( UGS ), announces the successful commissioning of two innovative biogas upgrading plants in the US states of Michigan and Wisconsin . The two plants , which together feed 800 Nm3 / h of biomethane into the local gas grid , are the first UGS systems of their kind . The projects were particularly challenging due to the change in operating procedures and the high grid requirements . The first commissioning , the Three Petals RNG plant in Berlin , Wisconsin , was followed by the second : the Red Leaf RNG plant at the Maple Row Dairy Farm in Saranac , Michigan . UGS , working with Novilla RNG , developed a new approach for treating biogas with high H2S concentrations . Unlike traditional methods that require costly pre-treatment or external desulfurization systems , which can introduce excess oxygen and affect gas quality , UGS ’ s system bypasses these complex processes at the Berlin and Saranac sites .
Decision in favor of UGS
Both plants process H2S concentrations of more than 4,000 ppm , which are sent directly into the compressor of the gas treatment plant and then directly through the first membrane stage . Instead of focusing on protecting the membrane treatment system , Novilla and UGS opted for an unconventional approach : the system uses a multi-stage , membrane-based treatment process that tolerates very high H2S concentrations of up to 30,000 ppm .
Strict grid requirements in Michigan
Michigan ’ s strict grid requirements limit O2 content to 5 ppm . To meet this , UGS installed
The membrane used by UGS separates up to 95 % of the 6000 ppm H2S without upstream desulphurisation , thus reducing the oxygen content in the biomethane product gas .
46 Valve World November 2024 www . valve-world . net