NOVELTY - Sludge is forcedly pushed into an organic heat carrier device, stirred and heated. Carbonic oxide and carbon dioxide, are continuously injected and mixed with steam and other gases, and sludge is pyrolyzed. The sludge contains organic substance, protein, fiber and Zoogloea. The product is dissolved, condensed, thermally formed, cooled and hardened. The flammable gas is transformed to solid, fiber is converted to charcoal, and organic charcoal with low molecular weight is changed to organic charcoal with high molecular weight. Fuel with heat value of 4000 kcal/kg, is obtained.    USE - Manufacture of charcoal.    ADVANTAGE - The charcoal is manufactured with high productivity.    DETAILED DESCRIPTION - Sludge is forcedly pushed into an organic heat carrier device, stirred and heated at 170-250 degrees C. The device is fully closed for heat preservation. Gases, such as carbonic oxide and carbon dioxide, are continuously injected into the space of device and mixed with steam and other gases, such that sludge generating chemical reaction is performed. The sludge is pyrolyzed such that bubbles are broken and steam is generated. The sludge contains organic substance, protein, fiber and Zoogloea. The product is mixed, dissolved and condensed to transform from paste into colloid, and thermally formed into rod or ball when moisture content is 9% or less. The resulting product is cooled and hardened. The flammable gas is transformed to solid, fiber is converted to charcoal, and organic charcoal with low molecular weight is changed to organic charcoal with high molecular weight by polymerization reaction. Fuel with heat value of 4000 kcal/kg, is obtained. The fuel is returned to production of charcoal by thermochemical method. The on-off energy source fuel organic heat carrier furnace is replaced?and the fuel provides heat to hollow blade stirrer of organic heat carrier device for circular use of making charcoal by pyrolyzing sludge. Each ton of 80% of aquiferous sludge produces 170-200 kg of charcoal and 700000-800000 kcal of energy. During production of charcoal, 640000 kcal of energy are required by generating each ton of sludge. The production is maintained by considering heat loss, and 54-60 kg of slag are generated after burning charcoal, and ash bricks for building are produced by adding cement and sand.