Removal of solid waste through the sewer system, for a cleaner hospital; removal of medicinal residues from wastewater for a cleaner environment. This, in short, is what the Pharmafilter-system promises. Shredders are used in the hospital in place of the traditional bedpan cleaners and at places where waste is generated. An installation is set up outside the hospital, which digests and decontaminates the solid waste. All wastewater is purified and cleaned of medicinal residues. The Pharmafilter-system makes it feasible to address processes in the hospital through the introduction of biodegradable, disposable products instead of products that need to be sterilized after each use, such as bedpans, urinals and cutlery.