Drainage treatment system and drainage treatment method

A drainage treatment system, comprising:

• a storage tank configured to store drainage from a plurality of factories;
• a water treatment device configured to purify the drainage from the storage tank using a combination of a solid detergent and a liquid regenerant;
• and
• a drainage treatment facility control device configured to control the water treatment device,
• wherein the water treatment device includes a solid detergent filtering device that performs a purification operation in which the drainage from the storage tank is transformed into purified water and a regeneration device that performs a regeneration operation in which impurities adsorbed by the solid detergent filtering device are desorbed, and
• wherein the drainage treatment facility control device acquires operating plan information from each of the plurality of factories to predict an amount of discharged drainage from each factory, predicts a transition of a physical quantity at each of various locations of the storage tank and the water treatment device at a time of the predicted discharged amount, and controls timing of an operation by the water treatment device in accordance with a result of the prediction of the transition of a physical quantity at each of various locations of the storage tank and the water treatment device at the time of the predicted discharged amount.