动态中温厌氧消化液进行鸟粪石回收磷的试验研究郭五珍

12122231．5280002．5102753．510275。。Ⅰ5．4∶1Ⅱ7．8∶11．1∶1pH7．784%。pHpH。[e-mail]omDynamicMesophilicAnaerobicDigestionSupernatantofSewageSludgeGUOWu-zhen1WANGYu-shan2YETing-jin1LIAn-qi2SHIChen-yi2SUNLian-peng231．FoshanWaterGroupCo．Ltd．Foshan528000China2．SchoolofEnvironmentalScienceandEngineeringSunYat-SenUniversityGuangzhou510275China3．GuangdongProvincialKeyLaboratoryofEnvironmentalPollutionControlandＲemediationTechnologyGuangzhou510275ChinaAbstractPhosphorusisoneoftheveryvaluablenaturalresourceswhichisbecominglessandlessnowadays．Astheby-productofactivatedsludgeprocessexcesssludgecontainslotsofnitrogenandphosphorus．Theresearchwasbasedonalab-scaledynamicmesophilicanaerobicdigestionsystemwithcontinuouslyaddingofsludgewhichmadealargereleaseofnitrogenandphosphorusintothesuperna-tant．Theoptimumconditionsofphosphorusrecoverybystruviteprecipitationfromanaerobicdigestiveef-fluentwereinvestigatedtoprovideatheoreticalbasisforthedesignofprocessparametersforrecyclingni-trogenandphosphorusinanaerobicdigestionsupernatant．TheexperimentwasdividedintotwostagesthemolarratioofN/Pwasabout5．4∶1instageⅠand7．8∶1instageⅡ．WhentheinitialpHofsu-pernatantwithoutaddingalkaliwasover7．7andMg/Pmolarratiowas1．1∶1thepurityofstruvitecouldreach84%．AfteraddingalkalitoadjustpHtheremovalratesofphosphorusandnitrogenwerein-creasedwiththeincreaseofpHbutthepurityofstruvitedidnotchangemuch．·75·321520168CHINAWATEＲ＆WASTEWATEＲVol．32No．15Aug．2016Keywordsphosphorusrecoveryanaerobicdigestionsupernatantofsewagesludgemeso-philicanaerobicdigestionstruvite。1。。、、。2、100mg/L3。。MgNH4PO4·6H2O4。、。pH、。11.120×104m3/dA/A/O。4℃。33～35℃。1.2、5。48h10mg100mL、、Mg2+=N×MM×100%1NmolMmg/molMmg。NH+4MgNH4PO461mol1mol。98%Alfa－Aesar96．8%。22.112。211。131d。891～89dⅠ90～131dⅡ。、1。20d22d。285～6∶1200mg/L500mg/L。。0．45μmpH7．7～7．8。MLSS5000～7000mg/LMLVSS/MLSS=0．25～0．35。COD300～650mg/L200～250mg/L。35℃20d·85·3215．watergasheat．com。pH=8．58Mg2+∶PO3－4=1．1∶1。ⅠⅡ12t/d250012181614121200150100101PO4/(mg·L-1)3-50a.PO43-141t/d8000121141b.NH+-N81614121600400200101NH4-N/(mg·L-1)+12ⅠⅡ41PO3－4、NH+4－NFig．1VariationofPO3－4andNH+4－Nininputandoutputsludgesupernatant20d100mL5．4∶1pH7．7。pH7．7、8．0、8．4、8．8、9．2、9．61．1∶1NaOH。897．8∶1。ⅡⅠ。2.2pHⅠ、Ⅱ1．1∶1pH2。Mg2+PO3－41．1∶1pHpH=7．775%84%。、pH80%。Ⅱ7．8∶1pH8。7。Ⅱ。氮磷去除率/%pH值1007509.29.6a.第Ⅰ阶段10080604050258.88.48.07.7PO4去除率NH4-N去除率鸟粪石纯度鸟粪石纯度/%3-+pH值1007509.29.6b.第Ⅱ阶段10080604050258.88.48.07.7PO4去除率NH4-N去除率鸟粪石纯度鸟粪石纯度/%3-+氮磷去除率/%2pHFig．2ＲemovalefficiencyofNandPandpurityofstruvitewithdifferentpHvalues2.32.3.1·95·．watergasheat．com3215、、Mg2+。ⅠⅡ1．1∶1pH、、Mg2+3。/mmol7.7pH0.070.060.050.040.030.020.0108.08.48.89.29.6Ｍg2+a.Ⅰ/mmol7.7pH0.070.060.050.040.030.020.0108.08.48.89.29.6Ｍg2+b.Ⅱ3pHFig．3ComponentcontentsinprecipitationindynamicsystemswithdifferentpHvaluespHpH、3Ⅰ、ⅡpHⅠ5．4∶1Ⅱ7．8∶1。pH。Ⅰ、ⅡpHpH。pH。2.3.2SEM1．1∶1pHSEM498%。pH=7．75。。5、1．1∶1、pH。498%Alfa－AesarFig．4SEMimageof98%purityofstruviteproductedbyAlfa-Aesar5pH=7．7Fig．5SEMimageofprecipitationwithpHvalueof7．72.3.3XpH=7．7XＲD6。pH=7．798%PDF#15－0762。16．93°、20．85°30．80°33．45°·06·3215．watergasheat．comMgNH4PO4·6H2O。pH7．71．1∶1。101530402θ/(°)PDF＃15-076298%201525356XＲDFig．6XＲDpictureofprecipitation3pH5．4∶17．8∶1pH。pH1．1∶1＞80%。1．J．2015362213－219．2CaoYPawlowskiA．Sewagesludge-to-energyapproachesbasedonanaerobicdigestionandpyrolysisBriefoverviewandenergyefficiencyassessmentJ．ＲenewableandSustainableEnergyＲeviews20121631657－1665．3．J．2008338118－120．4．D．2006．5．4M．2002．6YeZLChenSHLuMetal．ＲecoveringphosphorusasstruvitefromthedigestedswinewastewaterwithbitternasamagnesiumsourceJ．WaterSciTechnol2011642334－340．7．D．2008．1968－。[e-mail]2016－03－12贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯贯彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻彻执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执执行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行行《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《《中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中中华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华华人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人人民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民民共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共共和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和和国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国国防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防防洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪洪法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法法》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》·16·．watergasheat．com3215