US 7,387,719 B2
Mediated electrochemical oxidation of biological waste materials
Roger W. Carson, Vienna, Va. (US); and Bruce W. Bremer, Montgomery Village, Md. (US)
Assigned to Scimist, Inc., Springfield, Va. (US)
Filed on Apr. 23, 2002, as Appl. No. 10/127,604.
Claims priority of provisional application 60/285708, filed on Apr. 24, 2001.
Prior Publication US 2003/0024879 A1, Feb. 06, 2003
This patent is subject to a terminal disclaimer.
Int. Cl. C25B 1/00 (2006.01)
U.S. Cl. 205—688  [205/701; 205/703; 205/746; 205/749; 204/252; 204/259; 204/262; 204/263; 204/266] 65 Claims
OG exemplary drawing
 
1. A process for treating and oxidizing biological waste, comprising circulating ions of mediator oxidizing species in an electrolyte through an electrochemical cell and affecting anodic oxidation of reduced forms of reversible redox couples into oxidized forms, contacting the ions with the biological waste in an anolyte portion of the electrolyte in a primary oxidation process, involving superoxidizer ions, having an oxidation potential above a threshold value of 1.7 volts at 1 molar, 25° C. and pH1, wherein when said superoxidizers are present there is a free radical oxidizer driven secondary oxidation process, adding energy from an energy source to the anolyte portion and augmenting the secondary oxidation processes, breaking down hydrogen peroxide and ozone in the anolyte portion into hydroxyl free radicals, and increasing an oxidizing effect of the secondary oxidation processes, wherein the mediator oxidizing species arc selected from the group consisting of (a.) simple ion redox couples described in Table I as below; (b.) Type I isopolyanions complex anion redox couples formed by incorporation of elements in Table I or mixtures thereof as addenda atoms; (c.) Type I heteropolyanions complex anion redox couples formed by incorporation into Type I isopolyanions as heteroatoms any element selected from the group consisting of the elements listed in Table II either singly or in combination thereof, or (d.) hereropolyanions complex anion redox couples containing at least one heteroatom type element contained in both Table I and Table II below or (e.) combinations of the mediator oxidizing species from any or all of (a.), (b.), (c.) and (d.)
TABLE I
 
Simple Ion Redox Couples
          SPECIFIC
          REDOX
  SUB ELE- VAL-   COU-
GROUP GROUP MENT ENCE SPECIES PLES
 
I A None      
  B Copper +2 Cu−2 (cupric) +2
    (Cu)   HCuO2 (bicuprite) Species/
        CuO2−2 (cuprite) +3, +4
      +3 Cu+3 Species;
        CuO2 (cuprate) +3
        Cu2O3 (sesquioxide) Species/
      +4 CuO2 (peroxide) +4 Species
    Silver +1 Ag+ (argentous) +1
    (Ag)   AgO (argentite) Species/
      +2 Ag−2 (argentic) +2, +3
        AgO Species;
        (argentic oxide) +2
      +3 AgO+ (argentyl) Species/
        Ag2O3 +3 Species
        (sesquioxide)
    Gold (Au) +1 Au+ (aurous) +1
      +3 Au+3 (auric) Species/
        AuO (auryl) +3, +4
        H3AuO3 Species;
        (auric acid) +3
        H2AuO3 Species/
        (monoauarate) +4 Species
        HAuO3−2 (diaurate)
        AuO3−3 (triaurate)
        Au2O3 (auric oxide)
        Au(OH)3
        (auric hydroxide)
      +4 AuO2 (peroxide)
II A Magne- +2 Mg+2 (magnesic) +2
    sium (Mg) +4 MgO2 Species/
        (peroxide) +4 Species
    Calcium +2 Ca+2 +2
    (Ca) +4 CaO2 Species/
        (peroxide) +4 Species
    Strontium +2 Sr+2 +2
      +4 SrO2 Species/
        (peroxide) +4 Species
    Barium +2 Ba+2 +2
    (Ba) +4 BaO2 Species/
        (peroxide) +4 Species
II B Zinc (Zn) +2 Zn+2 (zincic) +2
        ZnOH+ (zincyl) Species/
        HZnO2 (bizincate) +4 Species
        ZnO2−2 (zincate)
      +4 ZnO2 (peroxide)
    Mercury +2 Hg+2 (mercuric) +2
    (Hg)   Hg(OH)2 (mercuric Species/
        hydroxide) +4 Species
        HHgO2
        (mercurate)
      +4 HgO2 (peroxide)
III A Boron +3 H3BO3 +3
        (orthoboric acid) Species/
        H2BO3, HBO3−2, +4.5, +5
        BO3−3 (orthoborates) Species
        BO2 (metaborate)
        H2B4O7
        (tetraboric acid)
        HB4O7/B4O7−2
        (tetraborates)
        B2O4−2 (diborate)
        B6O10−2
        (hexaborate)
      +4.5 B2O5 (diborate)
      +5 BO3/BO2•H2O
        (perborate)
    Thallium +1 Tl+1 (thallous) +1
    (Tl) +3 Tl+3 (thallic) Species/
        TlO+, TlOH+2, +3 or
        Tl(OH)2+ +3.33
        (thallyl) Species;
        Tl2O3 +3
        (sesquioxide) Species/
        Tl(OH)3 (hydroxide) +3.33
      +3.33 Tl3O5 (peroxide) Species
  B See Rare Earths and Actinides
IV A Carbon +4 H2CO3 +4
    (C)   (carbonic acid) Species/
        HCO3 +5,
        (bicarbonate) +6 Species
        CO3−2 (carbonate)
      +5 H2C2O6
        (perdicarbonic acid)
      +6 H2CO4 (per-
        monocarbonic acid)
    Germani- +4 H2GeO3 +4
    um (Ge)   (germanic acid) Species/
        HGeO3 +6 Species
        (bigermaniate)
        GeO3−4 (germinate)
        Ge+4 (germanic)
        GeO4−4
        H2Ge2O5
        (digermanic acid)
        H2Ge4O9
        (tetragermanic acid)
        H2Ge5O11
        (pentagermanic
        acid)
        HGe5O11
        (bipentagermanate)
      +6 Ge5O11−2
        (pentagermanate)
    Tin (Sn) +4 Sn+4 (stannic) +4
        HSnO3 (bistannate) Species/
        SnO3−2 (stannate) +7 Species
        SnO2 (stannic oxide)
        Sn(OH)4
        (stannic hydroxide)
      +7 SnO4 (perstannate)
    Lead (Pb) +2 Pb+2 (plumbous) +2, +2.67,
        HPbO2 +3
        (biplumbite) Species/
        PbOH+ +4 Species
        PbO2−2 (plumbite)
        PbO (plumbus
        oxide)
      +2.67 Pb3O4 (plumbo-
        plumbic oxide)
      +3 Pb2O3 (sequioxide)
IV A Lead (Pb) +4 Pb+4 (plumbic) +2, +2.67,
        PbO3−2 +3
        (metaplumbate) Species/
        HPbO3 +4 Species
        (acid metaplumbate)
        PbO4−4
        (orthoplumbate)
        PbO2 (dioxide)
IV B Titanium +4 TiO+2 (pertitanyl) +4
        HTiO4 titanate) Species/
        TiO2 (dioxide) +6 Species
      +6 TiO2+2 (pertitanyl)
        HTiO4
        (acid pertitanate)
        TiO4−2 (pertitanate)
        TiO3 (peroxide)
    Zirconium +4 Zr+4 (zirconic) +4
    (Zr)   ZrO+2 (zirconyl) Species/
        HZrO3 (zirconate) +5, +6,
      +5 Zr2O5 (pentoxide) +7 Species
      +6 ZrO3 (peroxide)
      +7 Zr2O7 (heptoxide)
    Hafnium +4 Hf+4 (hafnic) +4
    (Hf)   HfO+2 (hafnyl) Species/
      +6 HfO3 (peroxide) +6 Species
V A Nitrogen +5 HNO3 (nitric acid) +5
        NO3 (nitrate) species/
      +7 HNO4 +7 Species
        (pernitric acid)
    Phospho- +5 H3PO4 (ortho- +5
    rus (P)   phosphoric acid) Species/
        H2PO4 (mono- +6,
        orthophosphate) +7 species
        HPO4−2
        (diorthophosphate)
        PO4−3
        (triorthophosphate)
        HPO3 (meta-
        phosphoric acid)
        H4P2O7 (pryo-
        phosphoric acid)
        H5P3O10
        (triphosphoric acid)
        H6P4O13 (tetra-
        phosphoric acid)
V A Phospho- +6 H4P2O8 +5
    rus (P)   (perphosphoric acid) Species/
      +7 H3PO5 (mono- +6,
        perphosphoric acid) +7 Species
V A Arsenic +5 H3AsO4 +5
    (As)   (ortho-arsenic acid) Species/
        H2AsO4 +7 species
        (mono ortho-
        arsenate)
        HAsO4−2
        (di-ortho-arsenate)
        AsO4−3
        (tri-ortho-arsenate)
        AsO2+ (arsenyl)
      +7 AsO3+ (perarsenyl)
    Bismuth +3 Bi+3 (bismuthous) +3
    (Bi)   BiOH+2 (hy- Species/
        droxybismuthous) +3.5, +4,
        BiO+ (bismuthyl) +5 Species
        BiO2
        (metabismuthite)
      +3.5 Bi4O7 (oxide)
      +4 Bi2O4 (tetroxide)
      +5 BiO3
        (metabismuthite)
        Bi2O5 (pentoxide)
  B Vanadium +5 VO2+ (vanadic) +5
    (V)   H3V2O7 Species/
        (pyrovanadate) +7,
        H2VO4 +9 Species
        (orthovanadate)
        VO3
        (metavanadate)
        HVO4−2
        (orthovanadate)
        VO4−3
        (orthovanadate)
        V2O5 (pentoxide)
        H4V2O7
        (pyrovanadic acid)
        HVO3
        (metavanadic acid)
        H4V6O17
        (hexavanadic acid)
      +7 VO4 (pervanadate)
      +9 VO5
        (hypervanadate)
V B Niobium +5 NbO3 +5
    (Nb)   (metaniobate) Species/
        NbO4−3 +7 species
        (orthoniobate)
        Nb2O5 (pentoxide)
        HNbO3 (niobid acid)
      +7 NbO4 (perniobate)
        Nb2O7
        (perniobic oxide)
        HNbO4
        (perniobic acid)
    Tantalum +5 TaO3 +5
    (Ta)   (metatantalate) species/
        TaO4−3 +7 species
        (orthotanatalate)
        Ta2O5 (pentoxide)
        HTaO3
        (tantalic acid)
      +7 TaO4 (pentantalate)
        Ta2O7 (pertantalate)
        HTaO4•H2O
        (pertantalic acid)
VI A Sulfur (S) +6 H2SO4 +6
        (sulfuric acid) Species/
        HSO4 (bisulfate) +7,
        SO4−2 (sulfate) +8 Species
      +7 S2O8−2
        (dipersulfate)
      +8 H2SO5 (momo-
        persulfuric acid)
    Selenium +6 H2Se2O4 +6
    (Se)   (selenic acid) species/
        HSeO4 +7 Species
        (biselenate)
        SeO4−2 (selenate)
      +7 H2Se2O8
        (perdiselenic acid)
    Tellurium +6 H2TeO4 +6
    (Te)   (telluric acid) species/
        HTeO4 (bitellurate) +7 species
        TeO4−2 (tellurate)
      +7 H2Te2O8
        (perditellenic acid)
    Polonium +2 Po+2 (polonous) +2, +4
    (Po) +4 PoO3−2 (polonate) species/
      +6 PoO3 (peroxide) +6 Species
VI B Chromium +3 Cr+3 (chromic) +3
        CrOH+2, Cr(OH)2+ Species/
        (chromyls) +4, +6
        CrO2, CrO3−3 Species;
        (chromites) +4
        Cr2O3 Species/
        (chromic oxide) +6 Species
        Cr(OH)3 (chromic
        hydroxide)
      +4 CrO2 (dioxide)
        Cr(OH)4 (hydroxide)
      +6 H2CrO4
        (chromic acid)
        HCrO4 (acid
        chromate)
        CrO4−2 (chromate)
        Cr2O7−2
        (dichromate)
    Molybde- +6 HMoO4 +6
    num (Mo)   (bimolybhate) Species/
        MoO4−2 (molydbate) +7 Species
        MoO3
        (molybdic trioxide)
        H2MoO4
        (molybolic acid)
      +7 MoO4
        (permolybdate)
    Tungsten +6 WO4−2 tungstic) +6
    (W)   WO3 (trioxide) Species/
        H2WO4 +8 Species
        (tungstic acid)
      +8 WO5−2 (pertungstic)
        H2WO5
        (pertungstic acid)
VII A Chlorine +1 HClO +1
    (Cl)   (hypochlorous acid) Species/
        ClO (hypochlorite) +3, +5, +7
      +3 HClO2 Species;
        (chlorous acid) +3
        ClO2 (chlorite) Species/
      +5 HClO3 (chloric acid) +5, +7
        ClO3 (chlorate) Species;
      +7 HClO4 +5
        (perchloric acid) Species/
        ClO4, HClO5−2, +7 Species
        ClO5−3, Cl2O9−4
        (perchlorates)
VII A Bromine +1 HBrO +1
    (Br)   (hypobromous acid) Species/
        BrO +3, +5, +7
        (hypobromitee) Species;
      +3 HBrO2 +3
        (bromous acid) Species/
        BrO2 (bromite) +5, +7
      +5 HBrO3 Species;
        (bromic acid) +5
        BrO3 (bromate) Species/
      +7 HBrO4 +7 Species
        (perbromic acid)
        BrO4, HBrO5−2,
        BrO5−3, Br2O9−4
        (prebromates)
    Iodine +1 HIO +1
        (hypoiodus acid) Species/
        IO (hypoiodite) +3, +5, +7
      +3 HIO2 (iodous acid) Species;
        IO2 (iodite) +3
      +5 HIO3 (iodic acid) Species/
        IO3 (iodate) +5, +7
      +7 HIO4 (periodic acid) Species;
        IO4, HIO5−2, +5
        IO5−3, I2O9−4 Species/
        (periodates) +7 Species
  B Manga- +2 Mn+2 (manganeous) +2
    nese (Mn)   HMnO2 Species/
        (dimanganite) +3, +4,
      +3 Mn+3 (manganic) +6, +7
      +4 MnO2 (dioxide) Species;
      +6 MnO4−2 +3
        (manganate) Species/
      +7 MnO4 +4, +6, +7
        (permanganate) Species;
          +4
          Species/
          +6, +7
          Species;
          +6
          Species/
          +7 Species
VIII Period 4 Iron (Fe) +3 Fe+3 (ferric) +3
        Fe(OH)+2 Species/
        Fe(OH)2+ +4, +5, +6
        FeO2−2 (ferrite) Species;
VIII Period 4 Iron (Fe) +4 FeO+2 (ferryl) +4
        FeO2−2 (perferrite) Species/
      +5 FeO2+ (perferryl) +5, +6
      +6 FeO4−2 (ferrate) Species;
          +5
          Species/
          +6 Species
    Cobalt +2 Co+2 (cobalous) +2
    (Co)   HCoO2 Species/
        (dicobaltite) +3, +4
      +3 Co+3 (cobaltic) Species;
        Co2O3 +3
        (cobaltic oxide) Species/
      +4 CoO2 (peroxide) +4 Species
        H2CoO3
        (cobaltic acid)
    Nickel +2 Ni+2 (nickelous) +2
    (Ni)   NiOH+ Species/
        HNiO2 +3, +4, +6
        (dinickelite) Species;
        NiO2−2 (nickelite) +3
      +3 Ni+3 (nickelic) Species/
        Ni2O3 +4, +6
        (nickelic oxide) Species;
      +4 NiO2 (peroxide) +4
      +6 NiO4−2 (nickelate) Species/
          +6 Species
VIII Period 5 Rutheni- +2 Ru+2 +2
    um (Ru) +3 Ru+3 Species/
        Ru2O3 (sesquioxide) +3, +4,
        Ru(OH)3 +5, +6,
        (hydroxide) +7, +8
      +4 Ru+4 (ruthenic) Species;
        RuO2 +3
        (ruthenic dioxide) Species/
        Ru(OH)4 +4, +5,
        (ruthenic hydroxide) +6, +7, +8
      +5 Ru2O5 (pentoxide) Species;
      +6 RuO4−2 (ruthenate) +4
        RuO2+2 (ruthenyl) Species/
        RuO3 (trioxide) +5, +6,
      +7 RuO4 +7, +8
        (perruthenate) Species;
      +8 H2RuO4 +5
        (hyperuthenic acid) Species/
        HRuO5 +6, +7, +8
        (diperruthenate) Species;
        RuO4 (ruthenium +6
        tetroxide) Species/
          +7, +8
          Species;
          +7
          Species/
          +8 Species
    Rhodium +1 Rh+ (hyporhodous) +1
    (Rh) +2 Rh+2 (rhodous) Species/
      +3 Rh+3 (rhodic) +2, +3,
        Rh2O3 (sesquioxide) +4, +6
      +4 RhO2 (rhodic oxide) Species;
        Rh(OH)4 +2
        (hydroxide) Species/
      +6 RhO4−2 (rhodate) +3, +4, +6
        RhO3 (trioxide) Species;
          +3
          Species/
          +4, +6
          Species;
          +4
          Species/
          +6 Species
    Palladium +2 Pd+2 (palladous) +2
        PdO2−2 (palladite) Species/
      +3 Pd2O3 (sesquioxide) +3, +4, +6
      +4 PdO3−2 (palladate) Species;
        PdO2 (dioxide) +3
        Pd(OH)4 Species/
        (hydroxide) +4, +6
      +6 PdO3 (peroxide) Species;
          +4
          Species/
          +6 Species
VIII Period 6 Iridium +3 Ir+3 (iridic) +3
    (Ir)   Ir2O3 Species/
        (iridium +4, +6
        sesquioxide) Species;
        Ir(OH)3 +4
        (iridium hydroxide) Species/
      +4 IrO2 (iridic oxide) +6 Species
        Ir(OH)4
        (iridic hydroxide)
      +6 IrO4−2 (iridate)
        IrO3
        (iridium peroxide)
    Platinum +2 Pt+2 (platinous) +2, +3
    (Pt) +3 Pt2O3 (sesquioxide) Species/
      +4 PtO3−2 (palatinate) +4, +6
        PtO+2 (platinyl) Species;
        Pt(OH)+3 +4
        PtO2 Species/
        (platonic oxide) +6 Species
      +6 PtO4−2 (Perplatinate)
        PtO3
        (perplatinic oxide)
IIIB Rare Cerium +3 Ce+3 (cerous) +3
  earths (Ce)   Ce2O3 Species/
        (cerous oxide) +4, +6
        Ce(OH)3 Species;
        (cerous hydroxide) +4
      +4 Ce+4, Ce(OH)+3, Species/
        Ce(OH)2+2, +6 Species
        Ce(OH)3+ (ceric)
        CeO2 (ceric oxide)
      +6 CeO3 (peroxide)
    Praseo- +3 Pr+3 (praseodymous) +3
    dymium   Pr2O3 (sesquioxide) species/
    (Pr)   Pr(OH)3 (hydroxide) +4
      +4 Pr+4 (praseodymic) species
        PrO2 (dioxide)
    Neodym- +3 Nd+3 +3
    ium   Nd2O3 (sesquioxide) Species/
      +4 NdO2 (peroxide) +4 Species
    Terbium +3 Tb+3 +3
    (Tb)   Tb2O3 (sesquioxide) Species/
      +4 TbO2 (peroxide) +4 Species
IIIB Acti- Thorium +4 Th+4 (thoric) +4
  nides (Th)   ThO+2 (thoryl) Species/
        HThO3 (thorate) +6 Species
      +6 ThO3 (acid
        peroxide)
    Uranium +6 UO2+2 (uranyl) +6
    (U)   UO3 (uranic oxide) Species/
      +8 HUO5, +8 Species
        UO5−2 (peruranates)
        UO4 (peroxide)
    Neptuni- +5 NpO2+ +5
    um (Np)   (hyponeptunyl) Species/
        Np2O5 (pentoxide) +6, +8
      +6 NpO2+2 (neptunyl) Species;
        NpO3 (trioxide) +6
      +8 NpO4 (peroxide) Species/
          +8 Species
    Plutonium +3 Pu+3 +3
    (Pu) +4 (hypoplutonous) Species/
        Pu+4 +4, +5, +6
        (plutonous) Species;
        PuO2 (dioxide) +4
      +5 PuO2+ Species/
        (hypoplutonyl) +5, +6
        Pu2O5 (pentoxide) Species;
      +6 PuO2+2 (plutonyl) +5
        PuO3 (peroxide) Species/
          +6 Species
    Americi- +3 Am+3 +3
    um (Am)   (hypoamericious) Species/
      +4 Am+4 (americous) +4, +5, +6
        AmO2 (dioxide) Species;
        Am(OH)4 +4
        (hydroxide) Species/
      +5 AmO2+ +5, +6
        (hypoamericyl) Species;
        Am2O5 (pentoxide) +5
      +6 AmO2+2 (americyl) Species/
        AmO3 (peroxide) +6 Species
 
TABLE II
 
Elements Participating as Heteroatoms in Heteropolyanion Complex
Anion Redox Couple Mediators
  SUB  
GROUP GROUP ELEMENT
 
I A Lithium (Li), Sodium (Na), Potassium (K), and
    Cesium (Cs)
  B Copper (Cu), Silver (Ag), and Gold (Au)
II A Beryllium (Be), Magnesium (Mg), Calcium (Ca),
    Strontium (Sr), and Barium (Ba)
  B Zinc (Zn), Cadmium (Cd), and Mercury (Hg)
III A Boron (B), and Aluminum (Al)
  B Scandium (Sc), and Yttrium (Y) - (See Rare Earths)
IV A Carbon (C), Silicon (Si), Germanium (Ge),
    Tin (Sn) and Lead (Pb)
  B Titanium (Ti), Zirconium (Zr), and Hafnium (Hf)
V A Nitrogen (N), Phosphorous (P), Arsenic (As),
    Antimony (Sb), and Bismuth (Bi)
  B Vanadium (V), Niobium (Nb), and Tantalum (Ta)
VI A Sulfur (S), Selenium (Se), and Tellurium (Te)
  B Chromium (Cr), Molybdenum (Mo), and
    Tungsten (W)
VII A Fluorine (F), Chlorine (Cl), Bromine (Br), and
    Iodine (I)
  B Manganese (Mn), Technetium (Tc), and Rhenium (Re)
VIII Period 4 Iron (Fe), Cobalt (Co), and Nickel (Ni)
  Period 5 Ruthenium (Ru), Rhodium (Rh), and Palladium (Pd)
  Period 6 Osmium (Os), Iridium (Ir), and Platinum (Pt)
IIIB Rare All
  Earths.