低温胁迫下Ca_2_对厌氧氨氧化污泥脱氮效能影响研究_唐政坤
- 污水处理护水清
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2020-02-17 12:46:34
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第一作者:唐政坤,男,1991年生,硕士研究生,研究方向为污水处理。#通讯作者。*国家自然科学基金资助项目(No.51108277)。低温胁迫下Ca2+对厌氧氨氧化污泥脱氮效能影响研究*唐政坤张硕李光蕾李行李军#(沈阳建筑大学市政与环境工程学院,辽宁沈阳110168)摘要为了解决厌氧氨氧化(ANAMMOX)污泥在低温下脱氮效能较低的问题,采用上流式厌氧污泥床(UASB)反应器,通过投加不同浓度的Ca2+,考察低温胁迫下Ca2+对ANAMMOX污泥脱氮效能及特性的影响。结果表明:低温胁迫下ANAMMOX污泥脱氮效能明显降低,当Ca2+投加量为0mmol/L时,氨氮、亚硝态氮去除率分别降至50%、54%,UASB反应器的TN去除负荷最低为0.094kg/(m3·d);投加一定Ca2+对ANAMMOX反应有正面促进作用,在最佳Ca2+投加量(0.04mmol/L)下,氨氮、亚硝态氮去除率可分别提高至65%、68%,TN去除负荷提高至接近0.200kg/(m3·d),脱氮效能是未投加Ca2+时的2倍左右,但Ca2+投加量大于0.04mmol/L时,脱氮效能开始呈现下降趋势。投加Ca2+可以增大污泥颗粒粒径,提高污泥的混合液悬浮固体(MLSS)、混合液挥发性悬浮固体(MLVSS)浓度,但对污泥活性的提升不明显。关键词厌氧氨氧化低温胁迫脱氮效能Ca2+DOI:10.15985/j.cnki.1001-3865.2019.03.006EffectofCa2+onthenitrogenremovalefficiencyofanaerobicammoniaoxidationsludgeunderlowtemperaturestressTANGZhengkun,ZHANGShuo,LIGuanglei,LIHang,LIJun.(SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,ShenyangLiaoning110168)Abstract:Inordertosolvetheproblemoflowefficiencyofanaerobicammoniaoxidation(ANAMMOX)sludgeatlowtemperature,upflowanaerobicsludgebed(UASB)reactorwasusedtoinvestigatetheeffectofCa2+onnitrogenremovalefficiencyandcharacteristicsofANAMMOXsludgeunderlowtemperaturestressbyaddingdifferentconcentrationsofCa2+.TheresultsshowedthatthenitrogenremovalefficiencyofANAMMOXsludgedecreasedsignificantlyunderlowtemperaturestress,theremovalratesofammonianitrogenandnitritenitrogendecreasedto50%and54%whenCa2+dosagewas0mmol/L,theTNremovalloadofUASBreactorwaslowestat0.094kg/(m3·d),theadditionofCa2+hadapositiveeffectontheANAMMOXreaction,theremovalratesofammonianitrogenandnitritenitrogenincreasedto65%and68%,themaximumremovalloadofTNreachednearly0.200kg/(m3·d)undertheoptimumCa2+dosage(0.04mmol/L).TheremovalefficiencyofnitrogenwasabouttwotimesofthatwithoutaddingCa2+.However,thedenitrificationefficiencybegintoshowadownwardtrendwhenCa2+dosagewasmorethan0.04mmol/L.TheadditionofCa2+couldincreasetheparticlesize,themixedliquidsuspendedsolids(MLSS)andmixedliquorvolatilesuspendedsolids(MLVSS)ofsludge,buttheimprovementofsludgeactivitywasnotobvious.Keywords:A
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