高浓度氨氮废水处理与氨资源化新技术赵贤广

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1,1,1,2,2,1(1.,,210009;2.,,210036)[],,。40℃,pH≈11,(3000~5000)∶1(1000~2000)∶1,95%。99.9%,91%,10%~20%。5-,99.9%,91%。[];;;;[]X703.1[]B[]1005-829X(2011)12-0031-04Newtreatmenttechniqueforhighlyconcentratedammonia-nitrogenwastewaterandammoniarecoveryZhaoXianguang1,LiWu1,WangJinlong1,LiGuoping2,WangXiaoping2,XuYanhua1(1.JiangsuKeyLaboratoryofIndustrialWater-Conservation&EmissionReduction,CollegeofEnvironment,NanjingUniversityofTechnology,Nanjing210009,China;2.JiangsuKeyLabofEnvironmentalEngineering,JiangsuAcademyofEnvironmentalScience,Nanjing210036,China)Abstract:Aimingatthedisadvantagesofthetreatmenttechniqueofhighlyconcentratedammonia-nitrogenwastewaterbyairstrippingmethodappliedtoindustry,theinnerstructureoftraditionalairstrippingtowerhasbeenimproved,andahighlyefficientpackinghasbeenused.Undertheconditionsof40℃andpH≈11,thegasliquidratioisevidentlydecreasedfrom(3000-5000)∶1to(1000-2000)∶1,andtheammonia-nitrogenairstrippingrateincreasestoabove95%.AnovelrecycledammoniaabsorbentcanimprovetheabsorbingrateofNH3intheairstrip-pingtailgasashighasabove99.9%,andtheregeneratingrateofammoniaisabove91%.Meanwhiletheammoniagasreleasedfromtheabsorbentregenerationprocesssubjectedtothetwo-stagecondensationabsorptioncanget10%-20%ofNH3·H2O.Aftertheabsorbentsubjectedtofivetimesofabsorption-desorptioncirculatingexperi-ments,theammoniaabsorbingratemaintainsatabove99.9%andthedesorbingrateabove91%.Keywords:ammonia-nitrogenwastewater;airstrippingmethod;absorbent;ammoniarecovery;regeneration,。,,,,,。,〔1〕、〔2〕、〔3〕、〔4〕、〔5〕、〔6〕、〔7〕、〔8〕、〔9-10〕、〔11〕、〔12〕〔13-14〕。、。、、,。,(3000~5000)∶1,<90%,,,。〔3,15〕,。,,,,。,[](2008ZX07101-003);(KF2010006);(39727001)3112201112IndustrialWaterTreatmentVol.31No.12Dec.,201131〔16〕。11.1500~8000mg/L,;4000mg/L。1.21。1—;2—;3—pH;4—;5—;6—;7—;8—;9—;10—;11—;12—;13—;14—;15—;16—;17—;18—。1D=50mm,700mmθ。,、、、,θ,5%,;3,100、300、300mm,3,,。D=30mm,300mmθ。,94℃,;,0.5L/h;。1.3NaOHpH,,,。,,,。,;10%。1.4《》(GB7478—1987);,GB7478—1987。22.12.1.1pHpH〔17-20〕,pH11。,pH11。pH>11,,pH。2.1.21000mg/L,pH≈11,1000∶1,,2。22,<40℃,,>40℃,,40℃,95%。2.1.340℃、pH≈11,,3。3,1000∶1,;1000∶1,≥3000mg/L2011-12,31(12)3295%;,;<3000mg/L95%,1500∶1,95%。,1000∶1,。95%,(1000~2000)∶1。32.2-2.2.1,,。,、,pH≈4。,;,,;,。2.2.2,1000∶1,12L/h,10%,1。11,,99.9%,1mg/m3,《》(GB14554—1993)。2.2.3pH,3000mg/L,1000∶1,12L/h,pH4。4pHNH3,pH。4,pH<7,1mg/m3,,pH;pH≥7,pH,,,,,pH≈7,。2.2.4,10%~20%。:108℃,,60min,91%;。2.2.5,3000mg/L,40℃,1000∶1,pH≈11;12L/h,20℃,。,2。2-NH3-N/(mg·L-1)NH3/(mg·m-3)NH3/(mg·m-3)/%5005890.5699.9110007250.6699.92300016660.7499.96500028000.8999.98800053551.0299.982011-12,31(12),:/%/%199.9891.17299.9891.23399.9791.11499.9691.09599.9691.15332,5-,99.9%,91%,。2.3,。3000mg/L,40℃,1000∶1,pH≈11;12L/h,20℃,。,58mg/L,98%;NH30.9mg/m3。,。2.4,,4000mg/L。:40℃,1500∶1、pH≈11;:20℃,,12L/h;:108℃,60min。:,95.24%,NH3-N200mg/L,;,1.05mg/m3,;91.18%,94℃,15.26%。。3(1),。(3000~5000)∶1(1000~2000)∶1,95%,。(2),99.9%;108℃,91%,,10%~20%。(3),-,。(4),,。[][1],.[J].,2008,17(2):87-89.[2],,,.[J].,2007,27(2):61-65.[3],,.[J].:,2008,30(4):56-59.[4]DiwaniGE,RafieSE,IbiariNNE,etal.Recoveryofammonianitrogenfromindustrialwastewatertreatmentasstruviteslowreleasingfertilizer[J].Desalination,2007,214(1/2/3):200-214.[5],,.[J].,2009,7(3):26-32.[6],,.[J].,2003,29(2):85-88.[7],,.[J].,2009,40(3):23-26.[8]LiLiang,LiuYan.Ammoniaremovalinelectrochemicaloxidation:Mechanismandpseudo-kinetics[J].JournalofHazardousMaterials,2009,161(2/3):1010-1016.[9],,.[J].,2004,27(2):72-75.[10]HungCM,LouJC,LinCH.Removalofammoniasolutionsusedincatalyticwetoxidationprocesses[J].Chemosphere,2003,52(6):989-995.[11]MatouqMAD,Al-AnberZA.Theapplicationofhighfrequencyultrasoundwavestoremoveammoniafromsimulatedindustrialwastewater[J].UltrasonicsSonochemistry,2007,14(3):393-397.[12]LinLi,ChenJing,XuZuqun,etal.Removalofammonianitrogeninwastewaterbymicrowaveradiation:Apilot-scalestudy[J].Jour-nalofHazardousMaterials,2009,168(2/3):862-867.[13],,,.HCR[J].,2007,27(11):35-38.[14]RuizG,JeisonD,ChamyR.Nitrificationwithhighnitriteaccumu-lationforthetreatmentofwastewaterwithhighammoniaconcentra-tion[J].WaterResearch,2003,37(6):1371-1377.[15],.AC[J].,2001,8(6):34-35.[16],,.:,201010552653.2[P].2010-11-19.[17].[J].,2000,17(6):35-37.[18],,,.[J].,2006,32(1):60-62.[19],,,.[J].,2005,31(6):29-31.[20],,.[J].,2005,20(1):9-11.[](1968—),2007,,。:13851624491,E-mail:zxg174@163.com。[]2011-09-24()2011-12,31(12)34

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