| 摘要 |
The present invention is to provide means by which energy required for treating sewage sludge can be saved. The present invention provides a treatment system for a watery material that includes a dewatering tank in which liquefied matter of a material that is gaseous at a normal temperature and a normal pressure is contacted with the watery material and the watery material is separated into the resultant watery material and a liquid phase that contains an aqueous component from the watery material, an evaporator that vaporizes the material that is gaseous at a normal temperature and a normal pressure from the liquid phase, a separator that separates a gas of the material thus vaporized from effluent water, a condenser that condenses the gas into liquefied matter, a condenser that condenses the gas into liquefied matter, two or more external heat sources selected from the group consisting of atmosphere, sewage, warm effluent water, and ground water, an external heat temperature detector that detects temperatures of external heats of the external heat sources, and an external heat supply destination controlling unit that identifies external heat sources A and B on the basis of the temperatures of the external heats detected by the external heat temperature detector and controls the external heat from the external heat source A to be supplied to the evaporator and the external heat from the external heat source B to be supplied to the condenser.
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