Method for treating an effluent using simultaneous nitrification/denitrification in a biological filter
First Claim
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1. A method of simultaneously performing nitrification and denitrification of a wastewater effluent, comprising:
- a. directing the wastewater through a biological filter with cultures fixed to at least one bed of granular material;
b. continuously aerating and supplying oxygen to substantially the entirety of said bed of granular material;
c. measuring at least one parameter representing the oxygen consumption of said fixed cultures;
d. adjusting the supply of oxygen to the bed of granular material in relation to the results of measuring said parameter and of a set-value thereof; and
e. wherein the wastewater passing through the biological filter and the granular material is simultaneously nitrified and denitrified.
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Abstract
The invention concerns a method and installation for the treatment of excess sludge derived from biological wastewater treatment plants. The method is characterized in that it consists of associating at least one digestion step (4) and at least one wet oxidation step (2) of said sludge, said wet oxidation step being conducted at a temperature of between 50° C. and 180° C. and at a pressure of between 2 and 40 bar.
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20 Claims
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1. A method of simultaneously performing nitrification and denitrification of a wastewater effluent, comprising:
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a. directing the wastewater through a biological filter with cultures fixed to at least one bed of granular material;
b. continuously aerating and supplying oxygen to substantially the entirety of said bed of granular material;
c. measuring at least one parameter representing the oxygen consumption of said fixed cultures;
d. adjusting the supply of oxygen to the bed of granular material in relation to the results of measuring said parameter and of a set-value thereof; and
e. wherein the wastewater passing through the biological filter and the granular material is simultaneously nitrified and denitrified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification