Solids separator and method of treatment for biowaste

A method for separating solid material from a biowaste suspension comprising solid material in liquid, and subsequently sterilizing said solid material, comprising the steps of:

• conducting a suspension of biowaste into a chamber;
• conducting the suspension out of the chamber through a mechanical separation device, separating solid particles from the suspension;
• essentially draining the liquid part of the suspension from the chamber;
• monitoring and raising the temperature of the solid material remaining in the chamber by means of direct steam injection to a predetermined sterilization temperature;
• maintaining said sterilization temperature for a predetermined period of time, and
• removing the sterilized solid material from the chamber.