Method for controlling aeration systems of biological tanks treating waste water
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United States of America Patent
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Sep 18, 2001
Grant Date -
N/A
app pub date -
Jun 2, 2000
filing date -
Oct 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method of monitoring the efficiency of the aeration systems of biological basins of a wastewater treatment plant, characterized in that it consists in: i) measuring the throughput (Qt) of the plant and the rate (Qr) of recirculation of the mixed liquor from the clarifier to the aeration basin; and ii) measuring the concentration of dissolved oxygen in the aeration basin so as: a) to establish, during an aeration period, the material balance between oxygen supplied, oxygen consumed and oxygen discharged with the effluent; b) to establish, during a non-aeration period, the material balance between oxygen consumed and oxygen discharged with the effluent; c) to determine the amount of oxygen consumed by the biomass based on the two material balances established above; and d) to determine, from the data obtained at a), b) and c) , the value of the transfer coefficient .alpha.k.sub.L a under the conditions of the measurement.
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