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HZI BioMethan to supply biogas upgrading plant to Swiss paper mill

Hitachi Zosen Inova BioMethan (HZI BioMethan) has revealed that it has be given a contract by Swiss energy services provider Energie 360° to supply a biogas upgrading unit. This will be installed at the Model AG paper mill in Niedergösgen, Switzerland.

Germany-based Hitachi Zosen Inova BioMethan (HZI BioMethan), a subsidiary of Switzerland-headed engineering, procurement and construction (EPC) contractor  HZI Group has revealed that it has been awarded a contract by Swiss energy services provider Energie 360° to install a biogas upgrading unit at the Model AG paper mill in Niedergösgen, Switzerland where it will be used to upgrade the biogas from the Model AG paper mill into biomethane.

Combined concept

Biogas from the wastewater treatment unit at the paper mill will be upgraded to biomethane to provide heat and mobility. The technology for this process will be supplied by HZI BioMethan, a leading providers of flue gas treatment, gas upgrading and CO2 separation systems and is currently being manufactured at the HZI BioMethan facility in Zeven, Germany.

The order to develop and construct the upgrading plant was placed by Energie 360° against the backdrop of a “flourishing” biomethane market. In addition to CO2 separation, the project also features sophisticated technology for capturing hydrogen sulfide (H2S). HZI BioMethan was able to come up with an economical combined concept plant proposal that won the contract.

A membrane-based gas permeation process will be used to separate the CO2 contained in the biogas from the methane (photo courtesy HZI BioMethan).

A membrane-based gas permeation process will be used to separate the CO2 contained in the biogas from the methane (photo courtesy HZI BioMethan).

The project is designed with an external chemical-biological desulphurization process for undried biogas using pellet-based filtering material. A membrane-based gas permeation process will then be used to separate the CO2 contained in the biogas from the methane. Both the membrane module and desulphurization system have long lifetimes.

Cross-process experience

With many years’ experience covering digester systems through to grid feed-in, HZI BioMethan also has a wealth of expertise with regard to process interfaces, which will be a significant advantage for the client when it comes to implementing this project.

– We will be taking the adjacent facets into account from the outset, said Karsten Wünsche, CEO of HZI BioMethan.

The raw gas production is upstream. The gas characteristics of the input streams vary considerably depending on whether it is a classic digester system, a wastewater treatment unit or landfill. This is also significant with regard to the downstream connection to the natural gas grid.

– The corresponding design of the upgrading technology to ensure maximum methane yield requires sound engineering knowledge. Given that we manufacture both upgrading and feed-in technology, we also have the relevant knowhow here. This means that specific features can already be incorporated in our gas upgrading projects when drawing up proposals, explained Wünsche.

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