SYSTEMS AND METHODS FOR SEPARATING AND/OR REMOVING WATER SOLUBLE ORGANICS FROM AQUEOUS STREAMS
Systems and methods for removing water soluble organics from an aqueous stream is provided. In one embodiments a system comprises an electro-oxidation unit comprising a titanium anode comprising a mixed metal oxide (MMO) coating, a titanium cathode, a channel between the anode and the cathode, and a power source configured to apply electricity across the channel.
1 . A system for removing water soluble organics from an aqueous stream, comprising:
an electro-oxidation (EO) unit comprising:
a titanium anode comprising a mixed metal oxide (MMO) coating;
a titanium cathode;
a channel between the anode and the cathode; and
a power source configured to apply electricity across the channel.
2 . The system of claim 1 , an electrode array comprising a plurality of anodes and a plurality of cathodes.
3 . The system of claim 2 , wherein the system is formed into a cartridge.
4 . The system of claim 1 , wherein the MMO coating is iridium oxide.
5 . The system of claim 1 , wherein the MMO coating comprises iridium oxide, ruthenium oxide, tantalum oxide, and platinum oxide.
6 . The system of claim 1 , wherein the titanium cathode comprises an MMO coating.
7 . The system of claim 6 , wherein the MMO coating is iridium oxide.
8 . The system of claim 6 , wherein the MMO comprises iridium oxide, ruthenium oxide, tantalum oxide, and platinum oxide.
9 . The system of claim 1 , wherein a voltage of 5-10 V is applied across the channel.
10 . The system of claim 1 , wherein a current of 10-25 amps is applied across the channel.
11 . The system of claim 1 , wherein a polarity of the anode and the cathode can be switched.
12 . The system of claim 1 , wherein 10-70 mA/cm 2 is applied to the anode and cathode.
13 . The system of claim 1 , wherein a gap between the anode and the cathode is from about 2 mm to about 60 mm.
14 . The system of claim 2 , wherein the electrode array comprises 2 to 100 anodes and cathodes.
15 . The system of claim 1 , wherein a residence time in the electro-oxidation unit is between about 30 seconds to about 4 minutes.
16 . The system of claim 1 , further comprising a hydrocavitation unit.
17 . The system of claim 1 , further comprising a plurality of EO units.
18 . The system of claim 17 , wherein a portion of the plurality of EO units have a reversed polarity.
19 . The system of claim 1 , wherein the cathode is one of Ti, MMO coated Ti, and/or Boron doped diamond film coated TI and the anode is one of Ti, MMO coated Ti, and/or Boron doped diamond film coated Ti.
20 . A method for removing water soluble organics from an aqueous stream, comprising:
contacting a system of claim 1 with an aqueous stream or a portion of an aqueous stream from another process, wherein the aqueous stream comprises WSOs; and
removing at least a portion of the WSOs from the aqueous stream.