| 摘要 |
<p>PURPOSE:To improve performance of treatment and life of active carbon by bringing water to be treated into contact with powdery biotic active carbon so as to remove impurities and then by separating the powder biotic active carbon from the water so as to return the active carbon for reuse and also to take out the water as a highly treated water. CONSTITUTION:Water to be treated is first introduced into an ozone treatment tank 7, wherein it undergoes oxidation treatment through gas-liquid contact with ozone. Next the ozone-treated water is mixed with a returned powdery biotic active carbon slurry from a return line 20 and introduced into a biotic active carbon tank 17, wherein biotic film formed on the surface of biotically active carbon is brought into contact with the water to which dissolved oxygen is added so as to nitrify and decompose ammonia in the water. On the other hand, the powdery biotic active carbon adsorbs and removes dissolved organic materials. The water to be treated is sent into a solid-liquid separation tank 19. The separated powdery biotic active carbon is taken out as a slurry from the bottom, returned to the biotic active carbon tank 17 by a slurry pump 31 and recycled.</p> |
