) COD,,,, ph mg/l, ( ),, ph, Table Mainindexesofwastewaterquality ( ) ~ ph. ~. HACH-HQ d S(mg/L) ~ COD(mg/L) ~ HACH-DREL NH -N(mg/L) ~ (mg/l) ~ PE AA

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1 环境工程学报 Vol., No. ChineseJournalofEnvironmentalEnginering Apr. * 姜维王小佳贾仁勇夏四清 (, ), (ph ), SS( ) COD, : ph=, =, ~,, ρ (NH -N) = mg/l ρ (Cr) = mg/l ρ (SS) = mg/l ρ (COD) = mg/l ρ (S - ) = mg/l, % ~ % % % % %,,., X A - ( ) - - Experimentalstudyonpretreatmentoftannerywastewaterbyairstripping JiangWei WangXiaojia JiaRenyong XiaSiqing (StateKeyLaboratoryofPolutionControlandResourceReuse, TongjiUniversity, Shanghai, China) Abstract Airstrippingwasusedtopre-treatcombinedtannerywastewater.Inordertogetthehighestremovaleficiencyofammonianitrogen, theinfluenceofthephvalueofwastewater, theratiosofairtoliquid, the temperatureandtheinitialconcentrationofammonianitrogenwereinvestigatedrespectively.andtheconditions fortheremovalofcr, SS, CODandsulfidewerealsooptimized.TheresultshowedthatalthemaincontaminantscouldberemovedefectivelywhenthepHvaluewas, andtheratioofairtoliquidwasabove at ~.Undertherecommendedconditions, % ~ % ofnh -N, % ofchromium, % ofss, % ofcod, % ofsulfidewereremovedrespectivelyastheconcentrationofcontaminantsintheinfluent wastewaterwasρ (NH -N) = mg/l, ρ (Cr) = mg/l, ρ (SS) = mg/l, ρ (COD) = mg/l, ρ (S - ) = mg/l.andthat, inawiderangeofinitialconcentrations, NH -Ncouldalsobeeliminatedefectively.So itisfeasibletouseairstrippingasthepretreatmentprocesfortannerywastewater. Keywords airstripping;tannerywastewater;ammonianitrogen;cr;sulfide,, t/y [ ],,,, ;,, [ ~ ],,, [ ], [ ],,,, COD,,,, (ph ), SS( : ( ) (PCRRK ( ZX - - ) ); : - - ; : - - : ( ~ ),,, *, siqingxia@tongji.edu.cn

2 ) COD,,,, ph mg/l, ( ),, ph, Table Mainindexesofwastewaterquality ( ) ~ ph. ~. HACH-HQ d S(mg/L) ~ COD(mg/L) ~ HACH-DREL NH -N(mg/L) ~ (mg/l) ~ PE AA S - (mg/l) ~ : ph, NaOH, ph, min SS,, Schematicdiagramofairstrippingapparatus ph EfectofpHonammonianitrogenremoval, ph,,, ph ~,,,, Υ mm mm,, ph,, (Υ mm) NH + +OH - NH +H O,, ph,, [ ],, ph : ph w NH = ph % K b /K w + :w NH, K b, K w, ph,, ph,, ph,, ph,,, ph, ph, ph, ph

3 :,,, ( ), ph=,, Efectoftemperatureonammonia nitrogenremoval Efectofair-liquidratioonammonia nitrogenremoval,,,,,,,, [, ] [ ], ( ) ph=,, %, mg/l mg/l, mg/l, ph =,,,,,, %, NH + +OH - NH +H O, ;,, ;,,, [ ],,,,,, [ ],, % % %,,, % ~, mg/l, % ~,,,, ph,,,, Efectofdiferentinitialconcentrationsofammonia nitrogeninwastewateronammonianitrogenremoval, mg/l

4 ,, ~ mg/l, %,, ph (, ),, ph,,, Cr(Ⅲ ) [ ] ph,, mg/l,, ph, ph, ph Table EfectofpH valuesoncrremoval ph ph (mg/l) ph (%) / (mg/l) (%) (%), ph, : OH- OH- + Cr Cr(OH) CrO- H+ H+ OH - Cr(Ⅲ ) Cr(OH),,, Cr(Ⅲ ) OH - Cr (OH),, CrO - ( CH COOH Asp CH CH COOH Glu ) [ ], ph,. mg/l, %, ph,,, ph, ph ph SS COD ( ), SS mg/l, mg/l,, ph, SS COD, ph SS COD EfectofpH valuesonssandcodremoval

5 :, ph, COD SS, ph ; ph=, SS %, mg/l, COD SS ph Cr(OH), CrO - [ ],, ; ph min,, ph, COD SS ph,, COD SS, OH - Cr(Ⅲ ) Cr(OH),,, ph Cr(Ⅲ ) [ ] ; ph,, COD, ph COD %,, ph=, COD/ NH -N, C/N, ph ph, ( ), S - mg/l, ph=, =, ph EfectofpHandair-liquidratioon sulfideremoval S - +O + H O S + OH - :ph, OH -,, ph,,,,, ph,, ph % ~ % ( ) : NaOH, ph=, =,, kg; ACO- Longer Pump YZ X, kw h, ( %) /t,. / kw h, +. =..,,,,,,,,, ph ; ph, ; ph (ph=,,,,, COD,, ), ph (ph=,, ),, :

6 ( ), :ph=, =, ~,, mg/l, mg/l, ( ), ( ), =, COD ph,, SS % % ( ), ph ; ph,, ph (ph=, ), ph (ph=, ),, ( ) [ ] [ ]. :, [ ],,.,, ( ): ~ [ ] SongZ., WiliamsC.J., EdyveanR.G.J.Treatmentof tannerywastewaterbychemicalcoagulation.desalination,, : ~ [ ] Sajad Haydar, JavedAnwarAziz.Characterizationand treatabilitystudiesoftannerywastewaterusingchemicaly enhancedprimarytreatment(cept) Acasestudyofsaddiqleatherworks.JournalofHazardousMaterials,, : ~ [ ],,, ( ): ~ [ ],,,, ( ): ~ [ ],,,, ( ): ~ [ ],,,, ( ): ~ [ ],,,, ( ): ~ [ ],,..,, ( ): ~ [ ],,. ( ),, ( ): ~ [ ] José Fernández-Seara, JaimeSieres.Theimportanceof theammoniapurification procesinammonia-waterabsorptionsystems.energyconversion andmanagement,, : ~ [ ] TahirS.S., Naseem R.RemovalofCr(Ⅲ )fromtannery wastewaterbyadsorptionontobentoniteclay.separation andpurificationtechnology,, : ~ [ ] ChangdaoMu, WeiLin, MingrangZhang, etal.towards zero discharge of chromium-containing leather waste throughimprovedalkalihydrolysis.wastemanagement,, : ~ [ ],,,.,, ( ): ~

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