Method and apparatus for treating organic waste water
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United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Oct 15, 1998
filing date -
Jun 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus are disclosed for treating an organic waste water which are capable of utilizing compact equipment by reducing the quantity of a sludge to be treated. Organic waste water (A) is subjected to an aerobic biological treatment in a biological treatment tank (3). Then, solution (B) obtained by the treatment in the biological treatment tank (3) is solid-liquid separated into treated water (C) and sludge (D) in precipitation tank (5). A portion of the sludge (D) separated in the precipitation tank (5) is returned to the biological treatment tank (3) through a route (6). A portion (E) of the sludge separated in the precipitation tank (5)is concentrated by a concentration device (8). Thereafter, the concentrated sludge (E) is solubilized by thermophilic bacteria in a solubilizing tank (10).
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