Coagulation of the marrow in bones

A method of treating a meat-substance containing a bone structure comprising bone marrow in an apparatus, the method comprising:

• coagulating the bone marrow with microwaves generated by a plurality of solid-state RF energy sources, wherein the apparatus comprises a housing, a conveyor for conveying the meat-substance through the housing, the meat-substance is configured to be arranged on the conveyor in rows, the plurality of solid-state RF energy sources are arranged in rows on the apparatus, the rows of the plurality of solid-state RF sources are configured to be aligned with the rows of the meat-substance on the conveyor such that one or more of the rows of the meat-substance arranged on the conveyor pass under a respective one of the rows of the plurality of solid-state RF sources, wherein the apparatus comprises a cooling chamber comprising a cooling agent, the cooling chamber is located in between the housing and the conveyor, the cooling chamber surrounds the conveyor, wherein the method comprises measuring a temperature of one of more of the plurality of solid-state RF energy sources, and then based on the measuring step, the method comprises controlling a fluid flow of the cooling agent and/or a temperature of the cooling agent to cool the plurality of solid-state RF energy sources.