Tecno Project Industriale (TPI), the Italian leader in CO2 recovery plants, has signed a contract to supply a biogas upgrading plant in North Africa.

Moroccan company Sotrameg asked TPI to supply a system that, starting from 500 Nm3/h of biogas, is able to produce 300 Nm3/h of biomethane and 400 kg/h of CO2.

Integration of a second stream of 600 kg/h of CO2, a by-product of alcohol and sugar production, will result in a production rate of 1000 kg/h of CO2.

The system is equipped with a standard CO2 recovery unit, designed and configured for the production of food grade quality CO2.

“The most interesting aspect of the new plant,” said Ugo Moretti, Head of TPI, “is that it combines biogas upgrading and CO2 recovery, a solution which TPI is able to provide thanks to his deep know-how in both fields.”

In-house production of biomethane is an eco-friendly and cost-effective resource that offers opportunities for cost saving. Turning waste of sugar production into biogas allows Sotrameg to produce biomethane (for its own consumption or to inject into the national grid) and food grade CO2 (for beverage applications) on behalf of other companies of Delta Holding Group.

Delta Holding’s already owns a TPI plant producing CO2 for pharmaceutical use, gasworld understands.


TPI’s upgrading technology allows users to obtain a marketable and valuable biogas with parameters suitable for grid injection, vehicle fuelling, production of heat/energy with standard equipment, and high efficiencies (higher calorific value compared to poorly performing raw biogas).

Chemical absorption guarantees an easily tunable production (large turndown ratio, up to 1:4) and a constant performance in purification. All apparatus works in low pressure (no certification or special permissions required to the users), the equipment requires low maintenance (no multi-stage pumps installed, all sulfur compounds removed before compression, and standard compressors used), and there is low energy consumption, negligible methane losses, and no need for frequent cleaning of equipment.

The system is completely automated and monitored by a dedicated PLC control panel, while the plant itself is pre-fabricated in the TPI workshop on skid units to minimise erection time.