短程生物脱氮与同步除磷的中试研究徐晓宇

38　　　　Vol.32　No.11　2006徐晓宇　杨殿海(,　200092)　　　交互式反应器运行倒置A2/O处理低碳高氮城市污水,在其好氧段通过控制DO为0.5～1mg/L,进行短程硝化研究。结果表明:在总HRT为10h条件下,经过1个月左右稳定运行后,亚硝氮的累积率可以达到50%以上,最高达到75%左右,而且反应器对总氮的去除也有明显改善,出水总氮平均在10mg/L左右。亚硝酸盐在预缺氧区和缺氧区的反硝化反应较为彻底,进入厌氧池后不会对厌氧段生物释磷产生抑制。但是,低氧条件下的短程硝化过程会导致污泥沉降性能恶化,容易产生污泥膨胀,不过通过控制好氧末端的后曝气提高DO可以改善污泥的性状。　短程硝化　低碳高氮磷污水　交互式反应器　脱氮除磷Pilot-plantresearchonshort-termdenitrificationandsimultaneousPremovalXuXiao-yu,YangDian-hai(StateKeyLabofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)Abstract:InvertedA2/Oprocessinaninteractivereactorwasconductedtotreatmunicipalwastewaterwithhighnitrogenandlowcarboncontents.TheDOlevelattheaerobicsectionwascontrolledinrangeof0.5to1.0mg/Ltoinvestigatetheshort-termnitrification.Afteraboutone-monthsteadyoperation,average50%andmaximum75%ofnitriteaccucmulationwereobtainedundertotalretentiontimeof10hours.Alsotheremovaloftotalnitrogeninthereactorwasimprovedevidently;theaverageTNcontentintheeffluentwas10mg/L.Thedenitrificationofnitriteprogressedstronglyatthepre-anoxiaandanoxiazone,nodepressiontothebiologicalphosphorusreleaseintheanoxiasectioncouldbefounded.Buthowever,thelowoxygenconditionforshort-termnitrificationdeterioratedthesettlementfeatureofthesludge.Sludgebulkingwasobserved,butitcouldbeprotectedbywayofenrichedaerationattheendoftheaerationsectionofthereactor.TheincreasedDOlevelcanimprovethesedimentationfeatureofthesludge.Keywords:Short-termnitrification;Wastewaterwithhighnitrogenandphosphorusandlowcarboncontents;Interactivereactor;Nitrogenandphosphorusremoval　　,,、pH、DO。DelftSHARON30～35℃(863)(2002AA601023)。[1]。,pH8[2]。:pH7.490%,pH7.4～8.3[3]。30℃pH8,,DO。HannakiK[4],25℃,DOI:牨牥牨牫牱牳牴牤jcnkiwwe牨牴牰牬牪牥牥牰牨牨牥牨牥　Vol.32　No.11　200639　　　DO(0.5mg/L),,。Ruiz[5],DO0.7mg/L。,,,,,,。,DO,,,。1　1.1　/,,6.3m,2m,3m,37m3,100m3/d。1,1。1#～3#,4#～6#。:①,,;②,,,;③,,。1　　　/m/m30.7×1×32.11.94×1×35.822×1×366.3×1×318.91.6×1×34.82.85×212.751.2　,2,、1　2　3　45　6　71　/2　pHCODCr/mg/LSS/mg/LNH3-N/mg/LTN/mg/LTP/mg/L7～8100～2006020～3030～402～3,。1.3　CODCr、NO-2-N、NO-3-N、NH3-N、TN、TPMLSS,[6];DOWTWOxi330iDO;pHWTWpH330ipH。1.4　A2/O,20058,A2/O,30%2#,70%3#,1#,。:4.2m3/h;MLSS2200mg/L;25d,100%。20059～11,:1～20d,DO2mg/L,;21d,DO0.5～1mg/L,A2/O。,。2　,22～27℃。20d,A2/O。2,,1mg/L,15mg/L,30%,。21～60d,(4#)DO,0.5～1mg/L,40　　　　Vol.32　No.11　2006,A2/O,3。3,1mg/L,,DO,,DO;,,,DO,,,DO,。36d,50%,,50%,。:,。10d,,,,15mg/L,50%;,,10mg/L,65%。:,,。,。A2/O,,3#。1#2#:1#,;2#30%。4,2#,,3#1mg/L,,。5,,,30%,,,。,。,DO,[7]。[8],。21～33d,,(5#)DO,(6),　Vol.32　No.11　200641　　　SVI170mL/g,,;34d,DO2～3mg/L,,,SVI100mL/g。:DO,,SVI,。6　SVI3　(1)A2/ODO0.5～1mg/L,,,,,15%。(2),1mg/L,,。(3),,DO,,。(4),、,。参考文献1　,,,./Ι..,2004,24(5):762～7692　,./.,2001,21(1):79～833　,,..,1999,25(7):37～394　HanakiK,WantawinC,OhgakiS.etal.Nitrificationatlowlevelsofdissolvedoxygenwithandwithoutorganicloadinginasuspendedgrowthreator.WatRes,1990,24(3):297～3025　RuizG,JeisonD,ChamyR.Nitrificationwithhighnitriteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentration.WatRes,2003,37:1371～13776　《》..3.:,19897　.:[].:,20038　,,,..,2003,19(7):7～11　　&:2000921239309#E-mail:[e-mail]:2006-05-24管　井　修　复　的　常　用　方　法　　,、、,,,。,,,,,,。:(1),。(2),,,:①、、、;②;③、;④。　　(3),、,:①,,;②,,;③,、,d-d≥50mm。1m,。,。(4)24d,,,。(山西关铝股份有限公司　杜高民)