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A/O李德勇(,455004) NaOHNa2CO3,A/O。 A/O :1005-9598(2003)05-0042-03 :X784 :A ,,。A/O。、,、COD,。、,COD,。,,13。,(Na2CO3)(2000/t),6.94/t,53%。,Na2CO3。,。1 Na2CO3N2。。(NH+4)(NO-2),(NO-3)。,:2003-04-09:,1968,1990,,。,,。:-NH+4+2HCO-3+1.5O2=NO-2+H2O+2H2CO3-NO-2+0.5O2=NO-3NH+4+2O2+2HCO-3=NO-3+2H2CO3+H2O-13NH-4+23HCO-3=8H2CO3+10NO-2+3C5H7NO2+19H2O-NH+4+10NO-2+4H2CO3+HCO-3=3H2O+C5H7NO2+10NO-3NH+4+1.83O2+1.98HCO-3=0.021C5H7NO2+1.041H2O+0.98NO-3+1.88H2CO3HCO-3Na2CO3:Na2CO3+CO2+H2O2NaHCO32Na++2HCO-3HCO-3+H2OH2CO3+OH-。,,,,。:NO-2+3H(—)=0.5N2↑+H2O+OH-5(108) No.5(Total No.108) 200310 CoalChemicalIndustryOct. 2003 NO-3+5H(—)=0.5N2↑+2H2O+OH-,,;,。,Na2CO3,:(1);(2)。2 ,,A/O。,CO2,,,CO2,:CO2+H2OH2CO3H++HCO-3,。,,Na2CO3CO2。Na2CO3,。,Na2CO3。3 ,O2CO2,H2CO3H+HCO-3,CO2。H2CO3:K1=[H+]×[HCO-3]/[H2CO3]=4.2×10-7H2CO3,H+,HCO-3。,H+。,H+,NaOH。NaOH(100%)1300/t。Na+OH-。,1.0×10-14,[H+]×[OH-]=1.0×10-14OH-H+,HCO-3。,1molNH3-N1.98molHCO-3,0.1mol,HCO-3()H+。,(OH-)HCO-3。,,OH-,,OH-。:OH-,Na2CO3。4 ,,12。1 /mg·L-1pHpHpH/mg·L-1≤3007.5～9.07.0～7.56.5～7.51502 /mg·L-1pH/mg·L-1/mg·L-1COD/mg·L-1156.5～7.50.50.5150 ,,NaOHpH,Na2CO3,pH。3:(1)pH9～9.5,Na2CO35/6。,,pH,3()。·43· 200310 :A/O 3 pHpHpH/mg·L-19.0～9.57.5～8.07.0～8.0200～250 (2)pH9.5～10.5,Na2CO30.5。,4()5()。4 pHpHpH/mg·L-19.5～10.57.5～8.57.5～8.54005 /mg·L-1pH/mg·L-1/mg·L-1COD/mg·L-1107.0～7.50.50.5150 (3)pH11,Na2CO31/3,3d,,pH9.0,。,pH,,。,,。,,,Na2CO3。,,,,80mg/L。:(1)pH8.5,,8.5,;(2)pH。pH(OH-)Na2CO3,;(3)NaOHNa2CO3,;(4),,。。,NaOHNa2CO3,NaOH。,:(1)NaOHNa2CO3;(2)CO2,;(3),Na2CO3,CO2。,。5 ,,Na2CO3,A/O,2.5～3.5。,NaOHNa2CO3A/O。A/O。StudyandPracticeofAlkaliSourceintheWasteWaterTreatmentwithA/OMethodLIDe-yong(AnyangIron&SteelGroupCo.,455004)Abstract ThetheoryandpracticeofreplacementofNa2CO3withNaOHasthealkalisourceinA/Omethodfortreatingwastewaterwereprobed.ThiswellsolvesthehighcostinA/Omethod.Keywords A/Omethod,alkalisource,cost,keyoftechnology·44· 20035