WATER TREATMENT SYSTEM AND POWER GENERATION FACILITY

摘要

The water treatment system includes: an aluminate ion addition part for adding an aluminate ion additive to water to be treated containing at least salt content and silica; a first precipitation part provided on the downstream side of the aluminate ion addition part; a first pH adjustment part provided on the downstream side of the first precipitation part; a first solid/liquid separation part for separating the solid content in the water to be treated; a second pH adjustment part for adjusting the pH of the water to be treated from the first solid/liquid separation part to a second pH level; and a first separation membrane (desalination treatment) apparatus provided on the downstream side of the second pH adjustment part so as to separate the water to be treated into first permeated water and first non-permeated water by removing the salt content in the water to be treated.

主权项

1. A water treatment system comprising:
an aluminate ion addition part for adding an aluminate ion additive to water to be treated containing at least salt content and silica; a first precipitation part provided on a downstream side of the aluminate ion addition part so as to precipitate and separate solid content in the water to be treated; a first pH adjustment part provided on a downstream side of the first precipitation part so as to adjust a pH level of the water to be treated to a first pH level for precipitating residual aluminum in the water to be treated by supplying a first pH adjuster to the water to be treated from the first precipitation part; a first solid/liquid separation part provided on a downstream side of the first pH adjustment part so as to separate solid content in the water to be treated that has been adjusted to the first pH level; a second pH adjustment part provided on a downstream side of the first solid/liquid separation part so as to adjust a pH in the water to be treated to a second pH level of at most pH 5 by supplying a second pH adjusting agent to the water to be treated from the first solid/liquid separation part; and a first separation membrane apparatus provided on a downstream side of the second pH adjustment part so as to separate the water to be treated into first permeated water and first non-permeated water by removing salt content in the water to be treated.