Method and device for the treatment of organic matter, involving recirculation of digested sludge

A device for treatment of organic matter, the device comprising:

• A feed line for fresh organic matter;
• A thickener provided upstream of the feed line;
• A disintegration system provided downstream of the feed line and configured to carry out thermal hydrolysis on the organic matter to form disintegrated matter;
• A digester arranged downstream of the disintegration system and configured to at least partially digest the disintegrated matter;
• and
• A recirculation line for at least partially digested disintegrated matter from the digester, wherein the recirculation line extends from a point downstream of the digester to a point upstream of the disintegration system and downstream of the feed line.

A method for treatment of organic matter, the method comprising:

• feeding the organic matter to a disintegration system,
• subjecting the organic matter to thermal hydrolysis in the disintegration system to form disintegrated matter,
• feeding the totality of the disintegrated matter having a solids component and a liquid component to a digester in which the disintegrated matter is at least partially digested such that digested sludge is formed, and
• recirculating at least part of the obtained digested sludge to a point upstream of the disintegration system via a recirculation line.