Aquifer storage and recovery system using natural coagulant

An aquifer storage and recovery system using a natural coagulant, comprising:

• a coagulation reactor which mixes and agitates a natural coagulant and raw water to induce formation of flocs, and deposits the flocs to remove assimilable organic carbon (AOC) and organic matter included in the raw water;
• an aquifer storage and recovery tank which comprises a permeable layer and an underground aquifer, is supplied with supernatant of the coagulation reactor and stores reclaimed water through an aquifer storage and recovery process;
• and
• a coagulant condenser and separator which separates the reclaimed water of the underground aquifer into treated water and the natural coagulant,
• wherein a fine metal particle present in the permeable layer is dissolved in the supernatant in a form of a metal ion while the supernatant of the coagulation reactor passes through the permeable layer of the aquifer storage and recovery tank, and
• the metal ion included in the reclaimed water is separated as the natural coagulant by the coagulant condenser and separator, and the natural coagulant separated by the coagulant condenser and separator is fed into the coagulation reactor.