NaCl盐度对A2O工艺缺氧区胞外聚合物及生物絮凝性的影响张兰河

39920189ENVIＲONMENTALSCIENCEVol．39No．9Sep．2018NaClA2/O11211111．1320122．132012NaClA2/OfouriertransforminfraredspectroscopyFTIＲXX-rayphotoelectronspectroscopyXPSextracellularpolymericsubstancesEPS．NaCl0～5g·L－1A2/OflocculationabilityFA44%45.5μmEPS52.3～62mg·L－1PN/PS2.1NaCl10g·L－140g·L－1A2/OFA40%22%43.7μm32.1μmEPS76.5mg·L－1101.0mg·L－1PN/PS1.51.3．NaClFTIＲEPS、ⅠXPSEPSNa+C、O、N．A2/ONaClEPSX703.1A0250-3301201809-4281-08DOI10．13227/j．hjkx．2017121622017-12-202018-03-03516781195150807320180201016SF20170519013JH1971～[e-mail]nExtracellularPolymericSubstancesandBioflocculationofAnoxicSludgeinA2/OProcessZHANGLan-he1TIANＲui1GUOJing-bo2JIAYan-ping1ZHANGHai-feng1LIZheng1CHENZi-cheng11．SchoolofChemicalEngineeringNortheastElectricPowerUniversityJilin132012China2．SchoolofCivilandArchitectureEngineeringNortheastElectricPowerUniversityJilin132012ChinaAbstractInordertoimprovethebiologicalremovalefficiencyofnitrogenandphosphorusandbioflocculationperformanceofsalt-containingwastewatertheeffectofNaClsalinityontheefficiencyofdenitrificationandphosphorusremovalintheanoxiczoneofanA2/Oprocesswasinvestigated．FouriertransforminfraredspectroscopyFTIＲandX-rayphotoelectronspectroscopyXPSwereusedtoanalyzethecompositionandstructureofextracellularpolymericsubstancesEPSinactivatedsludgeoftheanoxiczonetodiscerntheeffectofsalinityonbioflocculation．ＲesultsshowedthatwhenNaClsalinitywas0-5g·L－1flocculationabilityFAinA2/Oanoxiczonewasabout44%andthesludgeparticlesizewas45.5μm．EPScontentincreasedfrom52.3mg·L－1to62mg·L－1andproteinPN/polysaccharidePSremainedat2.1．WhenNaClsalinityincreasedfrom10g·L－1to40g·L－1bioflocculationofsludgesignificantlydecreased．FAdecreasedfrom40%to22%andsludgeparticlesizedecreasedfrom43.7μmto32.1μm．EPScontentincreasedfrom76.5mg·L－1to101.0mg·L－1andPN/PSdecreasedfrom1.5to1.3．BasedonFTIＲanalysiswithincreaseinsalinitythemaincomponentsofEPSwerealwaysaminoamideⅠandcarboxyl．BasedonXPSanalysisincreasingsalinityledtochargetransferofsomegroupssuchasCOandNgroupsduringtheinteractionbetweenEPSandNa+butitsformdidnotchange．Keywordsanaerobic-anoxic-oxicreactorA2/ONaClsalinityanoxicsludgeextracellularpolymericsubstancesEPSbiologicalflocculation、1．．extracellularpolymericsubstancesEPSproteinPNpolysaccharidePSEPS40%～95%2．EPS、．①．3sequencingbatchreactorSBＲ39＜2%COD、NH－3-NSS87.6%、49.3%69%4%～6%78.4%、21.7%55.6%Zhao4SBＲ2%COD、BOD、NH+4-NTP95%．Palmeiro-Sánchez5SBＲNaCl7、13、20g·L－1PHAShe6SBＲ5～41.9g·L－15～37.7g·L－1．．②．Ｒaynaud7NaCl．He80.15、0.3、0.4mol·L－10.15mol·L－1．Cui9．Arabi10Na+．．A2/O、、11．A2/OA2/O．A2/ONaClEPSFTIＲXXPSEPS．11.1A2/O48L12L24L．．6123～6．5L．A2/O50%100%MLSS4000mg·L－1HＲT8h17～23℃．A2/O1．1A2/OFig．1SchematicdiagramofA2/Oprocess1.2g·L－1、0～40g·L－1、0.26g·L－1、0.05g·L－1、0.05g·L－1、0.01g·L－1．pH7.5～8.0．1.2NaOHEPS6000r·min－115min1mol·L－1NaOHpH1110min6000r·min－115min0.45μmEPSpH7．COD、TN、NO－3-N、NO－2-N、PO3－4-P28249NaClA2/O．AmbivalueLFC101．EclipseTi-SNikon．ZetaJS94H2．JC2000D1．、pHFiveEasyPlus．EPStotalorganiccarbonTOCTOCliqulTOCⅡelementar．PNPS．FTIＲTensor270.5cm－1XPSThermoESCALAB250XAlKa1486.6eV、MgKa1253.6eVEPS．1.3A2/ONaCl0、5、10、20、30、40g·L－120dpH7.5～7.9TTC1210min60r·min－130minSV30、SVI、MLSS13．FA14～16．80mLHS-10AL48W30s10mL1200r·min－12min550nmA60r·min－115min10mL1200r·min－12minB．FAFA=A－BA×100%122.1NaClNaClA2/O2．NaCl5g·L－1COD、62%、51%60%．、1718．NaCl10g·L－140g·L－1COD60%32%TN50%33%PO3－4-P57%25%．①19②NaClPHB③AOBPAOs20．2NaClCOD、TNPO3－4-PFig．2EffectofNaClsalinityonremovalefficiencyofCODTNandPO3－4-Pinanoxiczone2122．3．NaCl0～5g·L－1TF62.7～64.5mg·L·h－1NaCl．NaCl10g·L－140g·L－161.0mg·L·h－127.7mg·L·h－1．＞10g·L－13824392324．3NaClFig．3EffectofNaClsalinityonthedehydrogenaseofanoxiczone2.2NaClEPS2.2.1NaClEPS4NaClPN、PSEPS．NaCl0～5g·L－1EPS52.3～62.0mg·L－1PN27.6～30.0mg·L－1PS13.1～14.1mg·L－1NaCl1040g·L－1EPS76.5mg·L－1101.0mg·L－1PN33.0mg·L－140.3mg·L－1PS21.5mg·L－129.0mg·L－1．NaClPN/PS．NaCl0～5g·L－1PN/PS2.1NaCl10g·L－140g·L－1PN/PS1.51.3PS120%．、、25．Abbasi26NaClPS．NaCl＜5g·L－1EPS、PSPNNaCl10～30g·L－1EPS、PNPS．NaCl30g·L－1PNPS2728．2.2.2NaClEPSEPS4EPS、PNPSFig．4EffectofsalinityonEPSPNandPSamountsinanoxiczone5．3000～3700cm－1O—HN—H—OHPN1630～1680cm－1CO5EPSFig．5FTIＲspectravariationofEPSunderdifferentsalinityconditionsPNⅠ1400±10cm－1CO1110～1047cm－11030～1050cm－1C—O—CPS＜1000cm－129600～900cm－130．NaCl0～40g·L－1EPS3400、1640、1400、1050cm－1PNPS．、Ⅰ、EPSPN、PS48249NaClA2/O31．NaCl0g·L－140g·L－1EPSXPS6．NaBE1071.1eV1071.6eVNa1s．EPSC1s4C—CH282.1～283.0eV、C—ON283.6～284.3eV、COO—C—O285.0～285.6eV、HO—COＲO—CO286.5～286.9eVEPSO1s2CO530.4～531.0eV、O—C—OO—C—H532.6～532.9eV．NaCl040g·L－1C—ON283.6～284.3eV、COO—C—O285.0～285.6eVBECO530.4～531.0eV、O—C—OO—C—H532.6～532.9eVBE．C、O、NBEEPSNa+Na+．EPSEPSFTIＲ32．6EPSXPSFig．6XPSspectraofEPSunderdifferentsalinityconditions2.3NaClZeta．1NaCl05g·L－1Zeta－23.2mV－12.3582439mV．NaCl10g·L－140g·L－1Zeta－27.6mV－38.2mV．15．Wilén14FAFA．7aNaCl0～5g·L－1SV3027%SVI66mL·g－145.5μm．NaCl10g·L－140g·L－1SV3030%38%SVI75mL·g－195mL·g－143.7μm32.1μm．NaCl833．7bNaCl0～5g·L－1FA44%NaCl10g·L－140g·L－1FA40%22%．7cNaCl87.6°56.3°．8．＜5g·L－1＞10g·L－1．EPS、PNPSPNPSEPS．1ZetaTable1EffectofsalinityonZetapotentialNaCl/g·L－10510203040Zeta/