基于MBBR的CANON工艺处理消化液中试启动

中国环境科学2019,39(6)：2378~2386ChinaEnvironmentalScience基于MBBR的CANON工艺处理消化液中试启动周家中,吴迪*,韩文杰,管勇杰(青岛思普润水处理股份有限公司生物膜研究院,山东青岛266555)摘要：基于移动床生物膜反应器(MBBR)成功启动了自养脱氮工艺(CANON)处理污泥消化上清液.采用8.55m3中试系统,反应器内部填充SPR-III填料,填充率44%,通过动态流接CANON污泥(接种比例<1%),经过70d成功启动CANON工艺.运行至200d,TN去除负荷稳定在0.9kgN/(m3·d),出水氨氮浓度均值63.9mg/L,氨氮和总氮去除率均值分别为91%和85%.进水中存在的少量有机物使系统同时存在反硝化和厌氧氨氧化两种脱氮途径,促进了总氮的去除,对总氮去除的贡献分别占5%~7%和93%~95%.通过对pH值和曝气强度的控制,防止了悬浮载体结垢,平衡了DO、曝气强度以及生物膜厚度三者之间的关系,使生物膜始终处于适宜的厚度,稳定了系统的处理效果.高通量测序表明悬浮载体上的优势菌种为氨氧化菌(AOB)和厌氧氨氧化菌(AnAOB),其丰度整体呈增长趋势,至稳定运行期可达到17%和14%.系统无NOB存在,短程硝化效果良好,反硝化菌群丰度在2%~3%并相对稳定,进水中存在的少量有机物不会影响厌氧氨氧化菌的增殖.关键词：全程自养脱氮；自养脱氮；移动床生物膜反应器；厌氧氨氧化；污泥消化液；中试中图分类号：X703.1文献标识码：A文章编号：1000-6923(2019)06-2378-09Pilotscalestart-upofCANONdisposalsludge-digestionwastewatertreatmentbasedonMBBR.ZHOUJia-zhong,WUDi*,HANWen-jie,GUANYong-jie(BiofilmResearchInstitute,QingdaoSPRINGWaterTreatmentCO.Ltd.,Qingdao266555,China).ChinaEnvironmentalScience,2019,39(6)：2378~2386Abstract：Thisarticlereportedthestart-upprocessofsludgedigestionsupernatantstreatmentsbyCANONprocessbasedonMBBRreactor.Thepilotsystemwithavolumeof8.55m3wasusedandfilledwithSPR-IIIfiller,whichhadafillingrateof44%.TheCANONprocesswassuccessfullystartedafter70dwithdynamicinflowofCANONsludge,andtheinoculationratiowasbelow1%.After200d,theTNremovalvolumetricloadingwasstableat0.9kgN/(m3·d),themeanvalueoftheconcentrationofeffluentammonianitrogenwas63.9mg/L,andtheremovalrateofammonianitrogenandtotalnitrogenwere91%and85%respectively.TheN-removalpathwayofdenitrificationandanaerobicammoniumoxidationoccurredsimultaneouslyduetosmallamountoforganicmatterpresenceintheinfluent,whichaccountedfor5%to7%and93%to95%oftotalnitrogenremoval,respectively.BycontrollingofpHandaerationintensity,thescalingofsuspendedcarrierswaspreventedandtherelationshipamongDO,aerationintensityandbiofilmthicknesswasbalanced.Asaresult,thebiofilmalwaysmaintainedsuitablethickness,whichstabilizedthetreatmenteffectofthesystem.ThehighfluxsequencingindicatedthatAOBandAnAOBweredominantspeciesonthesuspendedca