| 摘要 |
PURPOSE:To enhance the purification degree of water by using a filter, formed of coarse aggregate, bone charcoal, fine aggregate and cement, as the filter of a contact aerator, and decoloring-sterilizing treated water by ozonization in a decoloring-sterilizing drum. CONSTITUTION:Wastes to be treated W0 from a water closet 1 is separated into solid wastes and sewage water W1 in a separative precipitator 3, and the sewage water W1 is transferred into a first aerator 4a. The sewage water W1 is subjected to aeration treatment for many hours in the aerator 4a so as to decompose included organic substance and the like by aerobic microorganisms bred being stuck to a filler 13. Treated water W2 from the aerator 4a is then transferred into a second aerator 4b with bone charcoal as a filler 14 for the concentrated removal of remaining color components. Treated water W3 is then subjected to the separation of sludge and the like in a precipitator 5 and sent into a decoloring-sterilizing drum 6 so as to be subjected to decoloring-sterilizing treatment by ozonization, thus obtaining purified water W close to fresh water. The water W is further transferred into a low tank 2 by a circulating pump 11. The treated water can be thereby purified to a high degree. |
