PROJECT INTRODUCTION

The upgrading plant is built and delivered in 2016 to a municipal wastewater treatment plant outside Stavanger in Norway. The wastewater treatment facility wishes to use food waste from the region and biomass from local farmers in addition to sludge; a large upgrading plant was bought to secure the future capacity.

At the same time the upgrading plant supports Norway’s goal carbon neutrality in 2050. The IVAR-plant is dimensioned for 1,500 Nm3/h of biogas and can deliver up to 1000 Nm3/h of biomethane to the local gas grid.

In Norway upgraded biogas is typically used for transport with CNG, where the gas is compressed to 200 bar, since there is no national gas grid, as in e.g. Denmark. Nord-Jæren is one of the few areas in Norway, where a local 4 bar gas grid has been constructed, which makes the IVAR-plant different from other Norwegian upgrading plants.  Because upgrading plants by Ammongas are operated pressureless on the upgrading, no unnecessary energy is used on compressing the gas. In addition to this, the plant is delivered with customised heat recuperation, which means that a large part of the heat consumption is returned to the customer and used as process heat in the biogas plant. In total the plant a low netto heat consumption in comparison to a traditional upgrading plant.

The upgrading plant is placed to the North Sea coast, and particularly weather exposed. To lengthen the lifetime of the plant Ammongas has customised and optimised the equipment to the harsh environment. Simultaneously the equipment has the same corrosion class normally used on ships. The equipment has been reinforced to withstand the wind load.

All in all, the plant that has been delivered to IVAR is tailored to the needs of the waste water facility, as well as the external factors in such a way that secures the best possible conditions for optimal operation and a long lifetime.