| 摘要 |
<p>A water clarification treatment system through denitrification reduction by facultative anaerobic bacteria, characterized in that an aerobic water stream recycling route for a reduction treatment by an aerobic filter using aerobic bacteria and an anaerobic water stream recycling route for a reduction treatment by a sealed anaerobic filter device (10) using anaerobic bacteria are provided separately, a nitrate generated in the aerobic water stream recycling route is rendered to ooze out to the inside of the anaerobic water stream recycling route via a powdery sand (5) and is decomposed in the anaerobic water stream recycling route, and preferably the nitrogen gas formed in the anaerobic water stream recycling route during the decomposition of the nitrate is discharged while being separated from the water in the aerobic water stream recycling route. The system allows the decomposition and the denitrification reduction in a short time of a nitrate which adversely affects the rearing of living beings such as a tropical fish for admiration and a fish or shellfish for food.</p> |
