Treatment of nutrient-rich water
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United States of America Patent
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Sep 23, 1997
Grant Date -
N/A
app pub date -
Oct 30, 1995
filing date -
Sep 28, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multistage treatment system for treating nutrient-rich water containing nitrogen compounds, phosphorous compounds, and other minerals. Three or more vessels or stages typically constitute the multistage treatment system. Each stage of the system is a reaction vessel having a first zone containing a substantially insoluble salt for precipitating phosphorous compounds and other minerals, a second zone containing a microorganism retained on an inert substrate for converting nitrogen compounds, and a separation device for removing precipitates from the water. The effluent from the multistage system may be further treated in ponds cultivated with aquatic grass or in a packaged algae filter having a medium for supporting algae growth and an artificial light source.
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