WATER TREATMENT METHOD AND WATER TREATMENT DEVICE

摘要

This water treatment method includes a first step of adding a calcium-containing inorganic substance that is insoluble in water to waste water in a reaction tank to convert fluoride ions included in the waste water to calcium fluoride, and a second step of enabling solid-liquid separation of the waste water that includes the calcium fluoride in a solid-liquid separation tank and removing the calcium fluoride from the waste water to obtain a first treated water. The method further includes a third step of adding a pH regulator to the first treated water in a pH regulating tank to regulate the acidity range of the pH in the first treated water, and a fourth step of passing the first treated water through a container filled with an aminopolyol-based chelate resin to remove by adsorption tetrafluoroborate ions from the first treated water to obtain a second treated water.