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C-Green Technology sees green with first industrial "hydrochar" plant

Equipment for industrial-scale Hydrothermal Carbonization (HTC) is being manufactured in Örnsköldsvik, Sweden for implementation at Stora Enso's fluting mill in Heinola, Finland. The equipment is the first industrial plant based on C-Green Technology AB's proprietary technology that will transform wet bio-sludge into "hydrochar", a valuable biocoal fuel.

Samples of C-Green Technology’s biocoal (also called “hydrochar”) the end product of its proprietary hydrothermal carbonization (HTC) process for sludge. The process eliminates pathogens, and immediately stops greenhouse gas (GHG) emissions caused by the decomposition of organic sludges (photo courtesy C-Green).

Founded in 2015, C-Green Technology’s business concept is to convert wet industrial residual flows into an energy-rich material “hydrochar” or biocoal using an environmentally friendly energy-efficient hydrothermal carbonization (HTC) process.

In 2016, C-Green built an HTC pilot plant in n Domsjö development area of Örnsköldsvik, together with among others Processum, part of RISE Research Institutes of Sweden, an independent, state-owned research institute, which offers unique expertise and over 100 testbeds and demonstration environments for future-proof technologies, products, and services.

I was born in Domsjö and know what is in the form of, for example, engineering resources, pressure vessel manufacture, workshops for manufacturing and assembly, industrial painting, electrical and instrument assembly, and so on. It is not everywhere you find so many solid companies and people with the skills needed to fix such a project, said Fredrik Lundqvist, one of the founders of C-Green.

The pilot plant has been in operation since 2017 with Processum and Örnsköldsvik involved in its development.

The collaboration with Processum has been fantastic. We have helped each other in many different ways. One of several concrete examples is that Processum’s staff can now operate the pilot equipment completely themselves, which gives them opportunities to develop their own operations, said Fredrik Lundqvist.

Industrial-scale demo in Finland

In 2018, the Swedish Energy Agency granted C-Green Technology almost SEK 22.7 million (≈ EUR 2.2 million) to build a full-scale industrial demonstration plant in Heinola, Finland at Stora Enso’s Heinola fluting mill.

The Swedish Energy Agency has granted C-Green Technology AB almost SEK 22.7 million (≈ EUR 2.2 million) to build a full-scale industrial demonstration plant at Stora Enso Heinola Fluting Mill in Heinola Finland. Using a hydrothermal carbonisation (HTC) technology the plant will convert industrial biosludge into a biocoal fuel (photo courtesy Stora Enso).

In cooperation with ÖMV, Stora Enso, and RISE Processum, the project aims to convert residual biosludge from the Heinola mill’s wastewater treatment process into biocoal that will be used in the energy boiler.

Now we in 2019 and are in full swing to complete our first industrial facility for transport to Stora Enso’s plant in Heinola and also in that project, staff from Processum will participate, Fredrik Lundqvist said.

The equipment in Heinola will be able to process 16 000 tonnes of bio-sludge per annum, resulting in an estimated reduction of 2 500 tonnes of carbon dioxide (CO2) equivalents per year. It is expected to be operational by the end of 2019.

We’re delighted that C-Green has chosen us as an important partner when the technology is scaled up further. We will be present on-site at Heinola throughout the implementation of equipment and also contribute to the project with our expertise during the start-up. It is also very pleasing that the facility is being manufactured here in Örnsköldsvik, which is a clear acknowledgment of our region’s attractiveness and competence for new technologies, commented Gunnar Westin, Business Developer at Processum.

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