短程硝化过程碱度变化规律与控制对策研究陈建伟

11121．3100292．650091pH。pH7．371．64kg/m3·dpH。1660mgCaCO3/L5．41mgCaCO3/mgN。pHpH7．0～7．8pH1770～2008mgCaCO3/L。X703C1000－4602201121－0105－04StudyonChangeandControlofAlkalinityinSHARONProcessCHENJian-wei1ZHENGPing1CHENXiao-guang1ZHENGKai21．DepartmentofEnvironmentalEngineeringZhejiangUniversityHangzhou310029China2．DepartmentofChemistryYunnanUniversityKunming650091ChinaAbstractThedynamicexperimentswerecarriedouttoinvestigatethevariationofalkalinityinSHARONprocessaswellastherelationofalkalinitytopHandvolumetricremovalrateofammoniani-trogen．TheresultsshowthatthemaximumreactionrateofSHARONobtainedatnormaltemperatureandpH7．37is1．64kg/m3·d．TomaintainasuitablepHthealkalinityneededwouldberaisedasvol-umetricremovalrateofammonianitrogenincreases．Theminimumalkalinityrequirementinthesystemis1660mgCaCO3/Landthealkalinityequivalentis5．41mgCaCO3/mgN．Anon-linearrelationexistsbetweenpHandalkalinity．ThepHchangeisrelativelysmallintherangeof7．0to7．8whichfavorsthealkalinitycontrol．Thecontinuousorintermittentadditionmodesshouldbeusedtokeepanoptimalalkalineconcentrationof1770to2008mgCaCO3/L．KeywordsSHARONalkalinitychangecontrolcountermeasure8632006AA06Z332。—、、1。pHpH7．9～8．22pH。pH。·501·2721201111CHINAWATER＆WASTEWATERVol．27No．21Nov．20113～5。。11.1KH2PO40．025g/LCaCl2·2H2O0．14g/LMgSO4·7H2O0．3g/LⅠ、Ⅱ1mL/L。ⅠEDTA5g/LFeSO45g/LⅡEDTA15g/LH3BO40．014g/LMnCl2·4H2O0．99g/LCuSO4·5H2O0．025g/LZnSO4·7H2O0．43g/LNiCl2·6H2O0．19g/LNa2SeO4·10H2O0．21g/LNaMoO4·2H2O0．22g/L。NH+4－NNH42SO4Na2CO3。1.22m31m3。16。1Fig．1FlowchartofSHARONprocess1.3SBR1m3SS1．9g/LVSS1．1g/LVSS/SS0．58。1.4—N－1－－SS、VSS7pHpHS－9VDOJPB－607。22.112hDO1．5mg/L710mg/L。＞80%＞90%。2pH9．61846mgCaCO3/L17．6℃pH8．562011．5mgCaCO3/L。215minpH141min6．75pH6．70。pH。2、、pHFig．2ChangesofNH+4－NNO－2－NNO－3－NandpHwithtime2VARRpH3。pH7．3～7．41840～1853mgCaCO3/L。1．64kg/m3·d1．49gN/gVSS·d。3pHFig．3ChangesofvolumetricammoniaremovalrateVARRwithpH·601·2721．watergasheat．com2.2pH35min171min1711mgCaCO3/L。pHy=1．23366×10－7x3－6．8062×10－4x2+1．25463x－765．4R2=0．98721xmgCaCO3/LypH。pH7．0～7．8pHpHpH7．07．8pH。pH7．3～7．4pH。2.34。＜1840mgCa-CO3/L＞1853mgCaCO3/L。5．41mgCaCO3/mgN7．14mgCaCO3/mgN8。4Fig．4RelationshipbetweenalkalinityandVARRpH7．47±0．02pH。pHy=0．0051x－8．4691R2=0．91332ykg/m3·dxmgCaCO3/L。33.1NH+4+1．5O2→NO－2+H2O+2H+3Kc=NO－2H+2NH+4O2aq1．54Kc17．6℃1．56×10－15NO－2mg/LH+mg/LNH+4mg/LO2aqmg/L。3H+H+。3.2pHpH。pH7．5～8．85。5。pHpHpH。5pHFig．5InfluenceofalkalinityandpHonVARR3.34NO－2=KcNH+4O2aq1．5H+25。TN、NH+4=TN－NO－26H+=1000×10－pH=103－pH7·701·．watergasheat．com27216、75NO－2=TN1+106－2pHKcO2aq1．58pH6．7～8．5pH1。18AlkNO－2TN=KcO2aq1．5KcO2aq1．5+106－2．46732×10－7Alk3－13．6124×10－4Alk2+2．50926Alk－1530．899。3.43.4.1pHpH。。1660mgCaCO3/L。3.4.2。pH7．0～8．5。pH。pH7．0～8．51770～2008mgCaCO3/LpH。。pH。4①pH7．371．64kg/m3·dpHpH。②pHpH7．0～7．8pH1770～2008mgCaCO3/L。③pH。1660mgCaCO3/L5．41mgCaCO3/mgN。1．M．2004．2ChuangHPOhashiAImachiHetal．Effectivepartialnitrificationtonitritebydown-flowhangingspongereactorunderlimitedoxygenconditionJ．WaterRes2007412295－302．3．J．2006323318－322．4GaulTMarkerSKunstS．Start-upofmovingbedbio-filmreactorsfordeammonificationtheroleofhydraulicretentiontimealkalinityandoxygensupplyJ．WaterSciTechnol2005527127－133．5．J．200319140－42．6．P．ZL2007[e-mail]2011－04－18·801·2721．watergasheat．com