WATER PURIFICATION DEVICE, AQUACULTURE WATER PURIFICATION SYSTEM, WATER PURIFICATION METHOD, AND PRODUCTION METHOD FOR AQUATIC ORGANISM

摘要

This water purification device is provided with: at least one base material supporting denitrifying bacteria; a holding part that holds the base material; a watering-sprinkling mechanism that sprinkles, onto the base material, water to be treated; and a water-draining mechanism that is provided to the holding part, and drains the treated water so that at least a portion of the base material is constantly not covered with the water to be treated.