By turning wastewater sludge into biocoal and green hydrogen, EU-funded researchers are helping reduce the steel industry’s environmental impact.
By Tom Cassauwers
What comes out of our wastewater treatment plants may not be very appealing, but the real problem is what is left behind after water treatment. Wastewater plants produce a liquid sludge that is usually dried and then burnt or dumped. This is costly, polluting, and has long been
