Circulating water utilization system salt concentration adjustment device, circulating water utilization system

摘要

The salt concentration adjustment device (10) of this recirculated water use system (1), which is constructed for a specific region as a subject, is provided with: a salt concentration measurement means (32) that measures the salt concentration of recirculated water; a recirculated water discharge tube (26) for discharging recirculated water to outside the recirculated water use system (1); a discharge valve (28) that opens/closes the recirculated water discharge tube (26); and a control device (20) that controls the discharge valve (28) in a manner so as to open when the salt concentration of the recirculated water as measured by the salt concentration measurement means (32) exceeds a first stipulated value.