| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus for purifying ground water wherein the section for iron removal is separated from the section for manganese removal so as to provide a dissolved oxygen content suitable for microorganism activity. <P>SOLUTION: The inside of a tubular filter column 1 is so partitioned as to form a first channel 4 for an ascending flow and a second channel 5 for a descending flow which communicates with the first channel 4 at the top thereof. The first channel 4 is filled with a filter material for the iron removal 2, while the second channel 5 with a filter material for the manganese removal 3. The first channel 4 has an inlet for raw water 6 and an inlet for oxygen or water to which oxygen is dissolved 7 below the filter material for the iron removal 2, and has an inlet for minute bubbles and oxygen or water to which oxygen is dissolved 8 above the filter material for the iron removal 2. A floss outlet 9 for discharging the floss is disposed above the portion where the first channel 4 communicates with the second channel 5, which has an outlet for treated water 10 below the filter material for the manganese removal 3. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
