WASTEWATER FILTERING APPARATUS
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United States of America Patent
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Issued Date -
Oct 9, 2008
app pub date -
Apr 4, 2008
filing date -
Apr 5, 2007
priority date (Note) -
Abandoned
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Abstract
A filtration apparatus including a tubular element (17) for purifying wastewater that flows from outside to inside, and a spray tube (21) for spraying cleaning water onto the external peripheral surface of the tubular element. In the first step, the external peripheral surface of the tubular element is cleaned and most of solid matter is removed. In the second step, compressed air is fed to the tubular element, and fine solid matter that is embedded in the filter is removed by backwashing.
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