| 摘要 |
An aquarium capable of automatically collecting, precipitating and draining sewage includes water intake ducts on two sides of the top and sloped surfaces on the bottom of the aquarium. The sloped surfaces direct towards a sewage collection duct in the center. The two water intake ducts direct water evenly to move dung and undesired substances to the sewage collection duct to be discharged to a precipitation tank. The precipitation tank has sewage collecting effect. A solenoid valve is provided and opened regularly (while a water pump stops operation) to automatically drain water and the sewage in the precipitation tank. After being precipitated and purified by the precipitation tank for the first time, a physical purification through a sponge is performed for the second time. Then a third purification via a bio-ball tank is done. When the solenoid valve is closed, the water pump resumes operation, and water level drops. A water replenishing valve automatically replenishes the water. |
