We make wet waste valuable!
Converting wet biowaste into solid
biocoal with OxyPower HTC™
“With this technology, we can save both the environment and costs.”
— Mikael Sillfors, Development Manager, Heinola Fluting Mill, Stora Enso, Finland
Mobile pilot in Rotterdam, The Netherlands
HTC-laboratory in Stockholm, Sweden
Circular sludge handling
Our OxyPower HTC™ facility can convert up to 30,000 tons of wet biowaste into sterile, dry biocoal, solving both disposal and environmental challenges in one go.
Visit our OxyPower HTC™ plant
C-Green’s OxyPower HTC™ plant at Stora Enso’s packaging paper mill in Heinola, Finland, is the world’s first hydrothermal carbonization (HTC) facility using the innovative OxyPower process. At an operating capacity of about 16.000 tons of biomass sludge annually, the biocoal produced will generate energy for the mill and the municipality of Heinola.
See the new film with Stora Enso’s perspective on the cooperation with C-Green and how our technology could become part of their strategy to become climate-positive.
What is the problem?
Sludge is dripping wet | Sludge can contain up to 90% water, making it voluminous, heavy, and expensive to transport and burn.
Expensive to dewater | Drying sludge with conventional methods is energy-intensive.
High pathogen content | Can create a hazardous work environment and cause environmental contamination.
Foul smell | The ever-present, noxious smell of sludge can be very unpleasant for workers and the surrounding community.
If sludge is not handled responsibly there is risk for:
Health and the environment | Leakage from and exposure to untreated sludge can be hazardous for both people and the environment.
The climate | Storing and composting sludge emits large amounts of methane and nitrous oxide, greenhouse gases that are much more potent than carbon dioxide.
Turn sludge into climate-smart, sterile and dry biocoal
Biocoal is useful
Biocoal is a solid, carbon-rich product with many applications: carbon sink, biofuel, or as soil improvement.
Climate-smart
Greenhouse gas emissions from sludge are effectively and immediately eliminated. Sludge is converted into solid biofuel and biogas, which can replace fossil fuels.
Increases nutrient recovery
Nitrogen can be recovered in the process and, when biocoal is incinerated, phosphorus can easily be recovered from the ash.
Saves money
Compared to conventional sludge handling, OxyPower HTC™ reduces costs. The process is almost completely self-sufficient—making it the most energy-efficient sludge handling method available.
Kills pathogens
Completely destroys all viruses, bacteria, and parasites, producing a sterile biocoal.
Renewable energy
The conversion of sludge into solid biofuel and biogas offers new sources of sustainable fuel.
Modular plant design for fast assembly and start-up
OxyPower HTC™ plants are constructed as easily transportable prefabricated modules, each individual module the size of 20-foot or 40-foot ISO container, making on-site assembly very easy. A standard OxyPower HTC™ main building, with a capacity of 30,000 tons dewatered sludge per year, requires an area of approximately 200 m2 with a height of 7 m.
