WATER TREATMENT APPARATUS, AND WATER TREATMENT UNIT, NUTRIENT-SOLUTION CULTURE APPARATUS, NUTRIENT-SOLUTION CULTURE METHOD, AND NUTRIENT-SOLUTION CULTURE PLANT THAT USE THE WATER TREATMENT APPARATUS

摘要

A water treatment apparatus is characterized in that it has a main body section capable of being installed along piping in which water flows, where the main body section has a small diameter section, an expanded-diameter section, and a large diameter section, formed in that order, along a direction in which the water flows, and an air inflow hole is formed in the expanded-diameter section so as to take in air from the outside.