Bright Biomethane - Membrane Biogas Upgrading System

In the membrane unit, the gas is separated by means of an imposed pressure difference over the membrane. Two gas streams will be obtained from the plant; a product gas, with a high methane value, and a CO2-rich gas. As a result of highly selective membranes and the recuperation of methane, the highest possible methane yield can be achieved. Depending on the application, the gas can be upgraded to the preferred methane value.

Having constructed the world’s fi rst commercial plant for upgrading biogas using a 3-stage membrane system, Bright Biomethane successfully uses this proven design in its systems operating today.

The advanced design and patented control system makes it possible to inject specifi cation compliant biomethane to grid within a few minutes of start-up. Another option is to use the gas as transport fuel (CNG). Other technologies can take much longer to start up with resultant methane losses and operational inconvenience. Bright Biomethane plant operators have the option to stop and start the facility at their convenience with minimal methane loss and no wasted energy consumption.

99.5% methane recovery, more than any other system. The lowest electricity consumption (0,22 kWh/Nm3 biogas). No heat required for the biogas upgrading process. Heat recovery (> 0,25 kWt/Nm3 biogas) covering the main energy consumption of the biogas facility. Competitive price level.

A Bright Biomethane CO2 recovery unit can also be integrated with the standard 3 or 2 stage membrane upgrading systems. The high separation effi ciency of the membranes means that the energy consumption of CO2 liquifi cation is much lower than conventional systems.
No water or chemicals are needed in the Bright Biomethane process which means that there are no disposal problems, such as acid water or chemicals that can be an unforeseen cost with other technologies.

Bright Biomethane is experienced in managing biogas produced from most forms of biomass feedstock, including municipal sludges and wastes. Based on this experience, reliable biogas pre-treatment solutions can be offered to ensure the correct biogas specifi cation is achieved before upgrading.

One of the applications is to inject the obtained gas into the national gas grid. It can also be used as transportation fuel (CNG/LNG) for vehicles. In both applications the patented 3 stage separation process ensures that the gas meets the requirements for a specifi c application. The residual heat and the CO2 can also be utilised. A special heat recovery system can be installed to produce high temperature water and CO2
may be recovered and liquefi ed to provide an additional value stream.