(JP6509986-W)      The matter is aq. suspension or soln. is alternately and cyclically digested in mesophilic and thermophilic stages.    In the mesophilic stage the matter and any thermophilic organisms present are at least partly digested.    In the thermophilic stage the organic matter and mesophilic organisms are at least partly digested.    The cyclic treatment is continued until the organic material is converted into gaseous prods..    The appts. comprises first-stage tank(s) and the outlet is connected to the inlet of second-stage tank. The outlet of the second-stage tank(s) is connected to the inlet of the first-stage tank(s).    Each tank has a material recycler from its outlet to its inlet and an independent temp. controller.    Pref. appts. comprises a reaction tank and tanks for separate maintenance of mesophilic and thermophilic organisms.    The appts. has organisms deliverer to the reaction tank and temp. alternator in the reaction tank from one pref. for growth of mesophilic organisms and inactiviation of thermophilic organisms to a temp. pref. for growth of thermophilic organisms and inactivation of mesophilic organisms.    USE/ADVANTAGE -   Prod. of organic sludge is avoided, leaving only mineral residues. Recovery of chemical energy as heat is obtd.    (JP2594751-B2)      The matter is aq. suspension or soln. is alternately and cyclically digested in mesophilic and thermophilic stages.    In the mesophilic stage the matter and any thermophilic organisms present are at least partly digested.    In the thermophilic stage the organic matter and mesophilic organisms are at least partly digested.    The cyclic treatment is continued until the organic material is converted into gaseous prods..    The appts. comprises first-stage tank(s) and the outlet is connected to the inlet of second-stage tank. The outlet of the second-stage tank(s) is connected to the inlet of the first-stage tank(s).    Each tank has a material recycler from its outlet to its inlet and an independent temp. controller.    Pref. appts. comprises a reaction tank and tanks for separate maintenance of mesophilic and thermophilic organisms.    The appts. has organisms deliverer to the reaction tank and temp. alternator in the reaction tank from one pref. for growth of mesophilic organisms and inactiviation of thermophilic organisms to a temp. pref. for growth of thermophilic organisms and inactivation of mesophilic organisms.    USE/ADVANTAGE -   Prod. of organic sludge is avoided, leaving only mineral residues. Recovery of chemical energy as heat is obtd.    (EP641296-B1)      The matter is aq. suspension or soln. is alternately and cyclically digested in mesophilic and thermophilic stages.    In the mesophilic stage the matter and any thermophilic organisms present are at least partly digested.    In the thermophilic stage the organic matter and mesophilic organisms are at least partly digested.    The cyclic treatment is continued until the organic material is converted into gaseous prods..    The appts. comprises first-stage tank(s) and the outlet is connected to the inlet of second-stage tank. The outlet of the second-stage tank(s) is connected to the inlet of the first-stage tank(s).    Each tank has a material recycler from its outlet to its inlet and an independent temp. controller.    Pref. appts. comprises a reaction tank and tanks for separate maintenance of mesophilic and thermophilic organisms.    The appts. has organisms deliverer to the reaction tank and temp. alternator in the reaction tank from one pref. for growth of mesophilic organisms and inactiviation of thermophilic organisms to a temp. pref. for growth of thermophilic organisms and inactivation of mesophilic organisms.    USE/ADVANTAGE -   Prod. of organic sludge is avoided, leaving only mineral residues. Recovery of chemical energy as heat is obtd.