WATER PURIFICATION DEVICE

摘要

PURPOSE:To dispense with periodical water exchange and provide fish or aquatic plant with the best suited water using a domestic or a commercial water purification device which purifies water for swimming pool, an aquarium and a fish culture pond. CONSTITUTION:A nitrification module 5 consisting of nitrification bacteria and a mineral substance, an ejector 2 arranged in the forward stream of the nitrification module, a denitrification module 6 comprising polymer beads in which nitrogen-fixing bacteria are collectively fixed and an ultraviolet emission device 7 are arranged in a tank water forced circulation flow path. It is possible to prevent nitric acid from accumulating or the pH value from deteriorating using polymer beads in which nitrogen-fixing bacteria are collectively fixed which removes nitric acid from water be to a nitric acid fixing action. Thus the accumulation of nitric acid and the deterioration of the pH value no longer occur.