Sewage treatment method
AssigneeEvocra Pty Limited
InventorMichael DICKSON
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Abstract
Disclosed herein is a method for remediating sewage that contains persistent contaminants. The method comprises ozofractionating the sewage under conditions whereby a foam fractionate comprising persistent contaminants is produced and separated from an ozofractionated wastewater, quiescing the ozofractionated wastewater, whereby a residual ozone content of the ozofractionated wastewater is reduced, and contacting the quiesced ozofractionated wastewater with a microorganism population under conditions effective to biologically remediate the ozofractionated wastewater.
Claims20
A method for remediating sewage that contains persistent contaminants, the method comprising:
- ozofractionating the sewage under conditions whereby a foam fractionate comprising persistent contaminants is produced and separated from an ozofractionated wastewater;
- quiescing the ozofractionated wastewater, whereby a residual ozone content of the ozofractionated wastewater is reduced to produce quiesced ozofractionated wastewater;
- and
- contacting the quiesced ozofractionated wastewater with a microorganism population under conditions effective to biologically remediate the ozofractionated wastewater.
The method of 9, wherein an activated sludge which settles during the primary biological digestion is recycled back into a wastewater pre-ozofractionation.
A method for co-remediating sewage that contains persistent contaminants and a trade wastewater that contains the persistent contaminants, the method comprising:
- ozofractionating the trade wastewater under conditions whereby a foam fractionate comprising persistent contaminants is produced and separated from an ozofractionated trade wastewater which contains an amount of the persistent contaminants that is about the same as or less than an amount of the persistent contaminants contained in the sewage;
- mixing the ozofractionated trade wastewater into the sewage to produce a combined wastewater;
- ozofractionating the combined wastewater under conditions whereby a foam fractionate comprising persistent contaminants in the combined wastewater is produced and separated from an ozofractionated combined wastewater;
- quiescing the ozofractionated combined wastewater, whereby a residual ozone content of the ozofractionated combined wastewater is reduced to produce a quiesced ozofractionated combined wastewater;
- and
- contacting the quiesced ozofractionated combined wastewater with a microorganism population under conditions effective to biologically remediate the quiesced ozofractionated combined wastewater.
The method of 16, wherein the ozofractionation(s) are carried out until the amount of the persistent contaminants contained in the ozofractionated trade wastewater is about half of the amount of the persistent contaminants contained in the sewage.
Dependencies are inferred from the claim text.