A2O污水处理工艺中污泥提浓与除磷的新方法

293Vol．29No．320167JournalofYantaiUniversityNaturalScienceandEngineeringEditionJul．20161004-8820201603-0222-04doi10．13951/j．cnki．37-1213/[e-mail]．A2/O121．2640052．264005A2/OA2/O．0.5mg/LA2/O．A2/OX799.3A．．1．2．、．A2/O3．A2/O4．A2/O、、5－6．A2/O．．80%．7－8．1．132.2%．A2/O9A2/O．A2/O3A2/O、．COD．1Tab．1Maincomponentsofpyriticslag%AuAgCuSPbAsCZnSiO2CaOMgOFe0.123.20.280.780.460.140.080.3532.32.500.3932.211.11．剩余污泥搅拌反应复合提浓剂上清液提浓机增浓污泥1Fig．1Schemeofexcesssludgeenrichmentprocess1.2．．0.6～0.8mol/LFe3+/Fe2+≤0.3．81～82℃pH5～63.5～4hFe3+Fe2+Fe3+/Fe2+=2．110℃．10．GB/T11901—1989．．．GB/T11893—1989．22.1A2/O12g/L44g/L3h1h2．403020100246812g/L40g/L清水中磷/(mg·L-1)厌氧时间/h2Fig．2Ｒelationshipbetweenphosphorusconcentrationreleasedbyexcesssludgeandanaerobictime3h5．47.06mg/L40%．A2/O．2.211－12．．0.5mg/L．320mg/L10mg/L．320mg/L3222960mg/L10mg/L50mg/L．2h10mg/L50mg/L．

2220181614121086420102030405060708020g/L10g/L清水中磷/(mg·L-1)硫酸亚铁/（mg·L-1）3Fig．3Ｒelationshipbetweenphosphorusconcentrationinoutputwateranddosageofcompositeagent2.3A2/O4～5g/L8～9g/L11～12g/L．4g/L8g/L12g/L14．12345612g/L8g/L4g/L提浓剂/（g·L-1）454035302520151050污泥浓度/（g·L-1）4Fig．4Ｒelationshipofconcentratedsludgeandcompsiteagent4g/L1.7g1min40g/L8g/L3.3g1min44g/L12g/L4.8g3min43g/L．0.4～0.53min41～44g/L、．2.4A2/OA2/O．．6～7h．30～40mg/L．．A2/O．5A2/O．5A2/O．厌氧段缺氧段好氧段进水二沉池出水回流污泥提浓剂混合提浓机离心机富磷剂余污泥脱清水5A2/OFig．5NovelA2/Oswedgetreatmentprocess4～5g/L41～44g/L．．4223A2/O．31A2/OA2/OA．2．3A2/O．1．J．201434123070－3077．2．J．201432728－31．3．A2/OJ．20071669－71．4．J．201036816－19．5．J．20083457－10．6．J．2006236356－357．J．2003291210－12．8．J．2004523－25．9．ZL201410060605．XP．2014－02－21．10．M．2012．11．J．2008311182－85．12．J．201028551－53．ANovelApproachforSludgeEnrichmentandPhosphorusＲemovalinA2/OSewageTreatmentProcessZHANGXiao-jieSUHong1．SchoolofChemistryandChemicalEngineeringYantaiUniversityYantai264005China2．SchoolofEnvironmentalandMaterialEngineeringYantaiUniversityYantai264005ChinaAbstractThetraditionalA2/Owastewatertreatmentprocessusuallypresentsagoodcapabilityofnitrogenremovalbutapoorperformanceinphosphorusremovalispoor．Thispaperreportsanovelcomplexforsimultaneouslyremo-vingthephosphorusinwaterandconcentratingtheexcesssludgewhichisproducedbycompoundingtheironoxideblackobtainedfromthepyriticslagwiththephosphorusremovalagents．Usingthecompositeagenttogetherwithahome-madeconcentratortheA2/Owastewatertreatmentsystemrealizesafastenrichmentandseparationofexcesssludgeandaneffectiveremovalofnitrogenandphosphorus．Aftertreatmentthephosphorusconcentrationinwaterislessthan0．5mg/L．ThetreatedeffluentcouldbedischargeddirectlyorbereusedtodilutetheinputwaterandimprovetheprocessingcapacityoftheA2/Owastewatertreatmentsystem．KeywordspyriticslagA2/Oprocessexcesssludgebiologicaltreatmentphosphorusremoval522