Pentair Haffmans has launched a compact carbon dioxide (CO2) recovery system which it claims goes “one step further” by capturing 100% of impurities released during conventional biogas upgrading techniques.

The new enclosed skid method has been designed so it can be connected to any existing biogas upgrading plant to capture by-product CO2 created during the anaerobic digestion process. The Netherlands-based business also claims its technology captures all impurities released during the process, including the ‘methane slip.’

As a result, Pentair’s technology has reduced the portion of environmentally-damaging greenhouse gases released into the atmosphere to almost zero.

Biogas produced through conventional anaerobic digestion usually consists of around 55% methane and 45% CO2, of which all of the latter and some of the former is expelled into the air. Pentair’s recovery system allows operators to capture and recover the CO2 from the biogas stream which can then be used in other applications, including dry ice production and and as gaseous fertiliser in greenhouses.

Pentair haffmans co2 recovery system for biogas upgraders

Pentair Haffmans CO2 Recovery System for Biogas Upgraders

Standard configuration: Pentair Haffmans’ CO2 recovery system in enclosed housing with two CO2 tanks

The captured CO2 currently complies with European Industrial Gases Association (EIGA) specifications, which means liquefied versions can also be sold to third parties.

Pentair’s recovery system is delivered as a stand-alone unit and can handle capacities of up to 1,000kg/h. Although individually designed according to customer specifications, the delivery and system start-up can commence within 16 weeks.

The European corporation has installed more than 25 biogas upgrading facilities in the Netherlands, Germany, France and the UK, since entering the market in 2010, and has further projects to be completed in South Africa and the Philippines by the end of this year.


Pentair Haffmans, based in the The Netherlands, supplies quality control equipment, micro-filtration and CO2 systems for the brewing and beverage, bioethanol and biogas industries. It is considered to be a market leader in state-of-the-art technology and customised solutions for CO2 recovery and management.