吹脱与鸟粪石沉淀组合工艺处理中温厌氧发酵沼液研究白晓凤

2015124612doi10．6041/j．issn．1000-1298．2015．12．029*121212121．1000832．100083+MAP。pH108h240090%。pH9.2MAPpHpH。MAP95%80%。CODSS40%32%。MAPpH8.3。MAPC/N0.710。。X703.1A1000-1298201512-0218-08TreatmentofLiquidDigestatebyStrippingCombinedwithStruvitePrecipitationBaiXiaofeng12LiZifu12YanYuanyuan12BaiXue121．SchoolofCivilandEnvironmentalEngineeringUniversityofScienceandTechnologyBeijingBeijing100083China2．BeijingKeyLaboratoryofＲesource-orientedTreatmentofIndustrialPollutantsBeijing100083ChinaAbstractStrippingcombinedwithstruviteprecipitationMAPwasusedtotreattheliquiddigestate．TheresultsshowedthatthebestprocessparametersforstrippingofthedigestatefrommesophilicdigestionwereasfollowsthepHvaluewas10strippingtimewas8hgas-liquidratiowas2400andfillerwasadded．Theremovalrateofammoniainthedigestatewasabout90%．ThepHvalueofthedigestateafterstrippingwasabout9.2anditwassuitableforMAPprecipitationmethod．ThepHvalueregulationwasnotnecessarysoitcansavethecostofdosage．Theremovalrateofammonianitrogenandtotalphosphoruswere95%and80%respectivelyafterMAPprecipitationtreatment．TheremovalratesofCODandSSwere40%and32%respectively．ThepHvalueoftheeffluentafterMAPprecipitationwasabout8.3whichcanmeettherequirementsofbiochemicaltreatment．MeanwhileC/Nratiooftheeffluentwasgreatlyimprovedwhichwasincreasedfrom0.7to10anditwasconducivetofurthertreatmentofthefollow-upbiochemicalsystem．Theprocessnotonlymakesthedigestatebeprocessedbutalsocanrecoverthenutrients．KeywordsLiquiddigestateStrippingMAPPhosphorusrecoveryNitrogenrecovery2015-07-242015-08-19*[e-mail]、[e-mail]。C/N、1－2。、、、、、1。395%。490%。595%。Bonmati6pH。Gustin7pH。Mg2+PO3－4NH+4MAP89－10。11。12、13－14、15－16。Song17MAPpH9.5～10.5。+MAP。11.11。1Tab．1ParametersofsampleCOD/mg·L－1/mg·L－1TP/mg·L－1/mg·L－1SS/mg·L－1pH2600～31003200～3800140～17090～1201000～13007.8～8.21.21.2.1+MAP1。1Fig．1Flowchartofdigestatetreatment。。。1.2.21pH、、、30℃。30℃。1L。10%。。2MAP、MgP、pH、。MAP2。2MAPFig．2TestdeviceforMAPprecipitationMgCl2·6H2O。NaOHpH。Mg2+PO3－4MgCl2·6H2O200r/min。20min91212MAP。22.12.1.1pHpH。NH+4NH3pH18。pH8、9、10、111L200L/h6h。pH3。pHpH。pH810pH1056%。pH1011pH。pH10。3pHFig．3EffectofpHvalueonstripping2.1.21L3564mg/LpH10200L/h。2h2、4、6、8、10、12h。4。4Fig．4Effectoftimeonstripping4。8h8h60%。8hpH。8h。2.1.319。。pH108h100、200、300、400L/h1L。5。5Fig．5Effectofairflowrateonstripping5。。300L/h400L/h。300L/h。2.1.4、20。0222015。1cm。0.3。pH10300L/h。68h90%。6Fig．6EffectoffilteronstrippingpH108h300L/h240090%。7pHFig．7EffectofpHvalueonammoniaandphosphateremoval2.2MAP2.2.1pHMAP30℃200r/minMg2+PO3－41pH8.0、8.5、9.0、9.5、10.0、10.5、11.0。20min20min。7。7pHpH9.047%78%。pH。pH10.011.0Mg2+OH－MgOH2MgCl2·6H2O。。pH11.0Mg3PO42pH。pHpH21。pH9.0～9.59.0。2.2.2Mg2+PO3－4MAPMAP22。23Mg2+PO3－41.3。30℃200r/minpH9。Mg2+PO3－4n0.8、1.0、1.2、1.4、1.6、1.8。20min20min。8。8n0.8Mg2+。Mg2+PO3－41.01.4。。n=1.8。Mg2+PO3－4、OH－。n=1.4122128Mg2+PO3－4Fig．8Effectofmolardistributiononammoniaandphosphateremoval。n=1.4。2.2.3MAP。。Bouropoulos24。30℃200r/minpH9Mg2+PO3－41.4。10、15、20、25、30min20min。9。9Fig．9Effectofreactiontimeonammoniaandphosphateremoval10Fig．10Effectoftemperatureonammoniaandphosphateremoval9。10min20min47%54%87%93%。。。。20min。2.2.4MAP。25。200r/minpH9Mg2+PO3－41.4。20、30、40、50℃20min20min。10。10。MAPNH+42222015。PO3－425℃MAP。2.2.5MAP2MAP。200r/minpH9Mg2+PO3－41.420min20min。2。MAP、、TP54%、93%、80%。MAPCODSSMgNH4PO4CODSS。TPTP80%。2MAPTab．2ＲemovalratesafterMAPprecipitation/mg·L－1/mg·L－1/%131414454.08232615153.561118893.232115892.67TP11362680.8821332878.95COD12234142036.4222156139735.21SS143033821.40244334621.903MAPpH8.3。pH。pH3pHTab．3pHvaluechangesofeffluent19.008.3029.008.38。2.3MAPMAP。pH101L30℃300L/h6h。200r/minMg2+PO3－41.4MAP。20min20min。4、5。4Tab．4Ｒemovalratesaftercombinedprocess/mg·L－1/mg·L－1MAP/mg·L－1/%1335632514995.562324528013395.901118110893.222109104793.58TP11421312979.5821361282780.15COD123482131137141.61223022109136040.92SS151345034732.36249643732833.875pHTab．5pHvaluechangesofcombinedprocessMAP110.009.218.40210.009.168.324MAPTP140mg/LTP30mg/L95%80%。CODSSCODSS40%32%。COD2100mg/LSS330mg/L。C/N0.7C/N10。5pH9.2MAPpHpH。MAPpH8.3。32212+MAP、、、。3MAP。pH108h2400。pH9.2MAPpHpH。MAPpH8.3。MAP140mg/LTP30mg/L95%80%。CODSS40%32%。C/N0.710。1．J．20122811205－211．SuiQianwenDongHongminZhuZhipingetal．AmmoniastrippingcontrolparametersforimprovingeffluenttreatmenteffectinanaerobicdigestersofpiggerywastewaterJ．TransactionsoftheCSAE20122811205－211．inChinese2．J．201243584－90．WangfengYanXiaonanYangHaizhen．TreatmentprocessofanaerobicallydigestedeffluentofchickenmanureformeetingthedisschargingstandardJ．TransactionsoftheChineseSocietyforAgriculturalMachinery201243584－90．inChinese3．J．200127620－24．4．J．20045651－53．WangWenbinDongYouLiuShiting．AirstrippingtoremoveammonianitrogeninlandfillleachateJ．TechniquesandEquipmentforEnvironmentalPollutionControl20045651－53．inChinese5．D．2011．XuBinbin．Treatmentofhighconcentrationsofammonia＆nitrogenwastewaterincoke-ovenplantwithblow-offmethodD．ChengduSouthwestJiaotongUniversity2011．inChinese6BonmatíAFlotatsX．Airstrippingofammoniafrompigslurrycharacterisationandfeasibilityasapre-orpost-treatmenttomeso