NOVELTY - Performing continuous thermal hydrolysis of sludge involves continuously feeding organic material in tube reactor (106) to increase the pressure and allow a temperature above 100 degrees C without boiling of the organic material; feeding steam into the reactor in a steam feeding zone, so as to increase the temperature to above 100 degrees C; maintaining the pressure in the reactor for a predetermined period of time, feeding water into the reactor in a cooling zone (110) to decrease the temperature to below 100 degrees C and outputting organic material in outputting zone.    USE - For performing continuous thermal hydrolysis of sludge (claimed); for preparing biological material for the manufacture of a bio product such as biofuel, bio-chemicals or biopolymers.    ADVANTAGE - The method provides system for continuous thermal hydrolysis in which no heat exchanger is needed to cool down the sludge; cooling of the biological material causes no or little depositing of particles on the inner surfaces of the tube reactor; and prevents depositing of particles in supply lines such as steam supply lines, connected to a reactor for thermal hydrolysis. The dry solids content of the biological material fed into the system is higher, as the biological material is thinned at a point downstream sludge feeding inlet. Due to the higher level of dry solids content, the capacity of the system is large relative to known systems comprising a heat exchanger for cooling the biological material to a temperature suitable for processing in a subsequent digester. The high temperature and the increased pressure may lead to desired chemical reactions, such as enzymatic hydrolysis of long chain carbon molecules.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an apparatus for continuous hydrolysis of sludge comprising an organic material comprising a tube reactor with an inlet for feeding sludge into the reactor in a feeding zone, an inlet for feeding steam into the reactor in a steam feeding zone, an inlet for feeding cooling water into the reactor in a cooling zone, and an outlet for allowing processed sludge to exit the reactor.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of system for continuous thermal hydrolysis.    Sludge treatment system (100)    Reservoir (102)    Biological material supply system (104)    Tube reactor (106)    Digester (108)    Cooler (110)    Sludge outlet (114)