Patent ID: 11939249
Assignee: PROTOTECH AS
Field: Environmental technology (Chemistry)
Classification: CPC C  F  H  Y | IPC C  F  H

Claim 0:
1. A method for continuous large scale converting an aqueous salt containing sludge from a marine fish farm into gases and a solid residue, comprising the steps of:
dewatering the aqueous salt containing sludge to a water content of 20-60% (weight/weight);
heating the dewatered sludge to a temperature of 500° C. to 700° C. by microwave radiation, thereby generating heat and steam;
partially or completely pyrolyzing the heated dewatered sludge to produce pyrolysis products, wherein the pyrolysis products comprise CO gas, CH4 gas and H2 gas, CHO oil and solid C;
gasifying the pyrolysis products, wherein the solid C, H2 gas and CHO oil are gasified to CO gas and H2 gas, wherein
the steps of pyrolysis and gasification takes place simultaneously in one reactor, and
the microwave radiation generates the steam for the gasification reaction by heating the water in the salt containing aqueous sludge.