In the media
2026-01-26 I BIOENERGI
New waste criteria strengthen C-Green’s work with HTC biochar as an industrial product
The new national waste criteria are expected to improve regulatory clarity and strengthen C-Green’s ability to classify HTC biocoal as an industrial product, supporting further validation and commercial development.
2026-01-22 I Impact Loop
REVIEW: The impact companies raising capital right now
Interview with Monika Schildknecht, CEO at C-Green
2026-01-13 I Dagens industri
New national criteria strengthen C-Green’s work with HTC biochar as an industrial product
At a press briefing on 11 December, the Swedish Government emphasized the need to adapt waste legislation to new technologies in order to increase material recycling. In the subsequent legislative proposal submitted to the Council on Legislation, national criteria are proposed for when waste ceases to be classified as waste.
2025-11-10 I Process Nordic
Interview with Karl Wejke, Head of Communications at C-Green
PFAS are a class of chemicals that have received considerable attention in recent years and are commonly referred to as “forever chemicals” due to their persistence in the environment. The aim of this study is to investigate the behavior of PFAS during hydrothermal carbonization (HTC) in order to optimize and further develop the technology, enabling controlled management of these substances.
“Our objective is not merely to determine the presence of PFAS, but also to quantify how much is retained in the biocoal, how much remains in the aqueous phase, and how the compounds behave throughout the HTC process.”
2025-11-03 I Ny Teknik
C-Green takes the next step in PFAS mapping during the conversion of sludge into biochar
C-Green AB is now moving forward with the next phase of testing to monitor PFAS – so-called “forever chemicals” – during the conversion of sludge into biochar through the company’s hydrothermal carbonization (HTC) process. The initiative is part of C-Green’s proactive efforts in preparation for upcoming EU legislation on PFAS and aims to increase understanding of where these substances end up in the process and to what extent they are destroyed during treatment.
2025-08-28 I Impact Loop
Interview with Monika Schildknecht, CEO at C-Green
“We have based both the design and the choice of components on the experience we have gained from operating the facility over a period of two years. It has been invaluable to acquire that knowledge."
2025-08-26 I Dagens industri
C-Green develops AI tool for sludge and HTC biochar analysis
C-Green takes the next step in its mission to contribute to future sustainable environmental technology solutions. The company is now developing an AI-based analysis tool that makes it possible to predict the outcomes of hydrothermal carbonization (HTC) even before tests are carried out.
2025-05-13 I Cirkulation
C-Green launches updated HTC technology for sludge drying
C-Green’s updated HTC technology builds on our proven solution, but now offers higher energy efficiency, lower operating costs, and a more robust process. The streamlined operation is designed to increase stability and reduce the need for operator intervention.
2025-04-02 I Ny Teknik
C-Green is testing pelletized hydrochar as a sustainable alternative to fossil-based forest fertilizer
A pelletized mix of hydrochar and ash is now being tested for application in growing forests. The aim is to evaluate the potential of the pellets as a replacement for today’s fossil-based forest fertilizers.
2024-11-19 I Dagens industri
C-Green registers the BioBooster Trademark
Previous studies have demonstrated that biocoal can significantly enhance biogas production when used as an additive in digestion processes. At C-Green, we’ve coined the term BioBooster to highlight biocoal's potential to boost biogas production in digesters.