分段进水A_O工艺流量分配专家系统的建立与应用_王伟

第59卷第10期化工学报Vol.59No.102008年10月JournalofChemicalIndustryandEngineering(China)October2008研究论文分段进水A/O工艺流量分配专家系统的建立与应用王伟,王淑莹,孙亚男,彭永臻(北京工业大学北京市水质科学与水环境恢复重点实验室,北京100022)摘要:分段进水A/O工艺中,进水流量分配是重要控制参数,是该工艺稳定运行并发挥优势的关键。本文提出3种流量分配思想:等负荷流量分配法、流量分配系数法及末端集中进水,并根据实际生活污水进行试验得出的大量试验数据,辅以相关领域文献及污水处理领域专家的经验作为参考,建立分段进水A/O工艺流量分配专家决策系统。该专家系统可以根据不同的进水水量、水质及出水特点,对合适的流量分配方法进行决策。最后,针对实际污水处理厂一天内典型的水质水量变化情况,对专家系统的应用进行说明。关键词:污水;生物脱氮;分段进水;流量分配;专家系统中图分类号:X703.1文献标识码:A文章编号:0438-1157(2008)10-2608-08Establishmentandapplicationofinfluentflowdistributionexpertsysteminstep-feedA/OprocessWANGWei,WANGShuying,SUNYanan,PENGYongzhen(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:Inthestep-feedanoxic/oxic(A/O)process,influentflowdistributionratioisacrucialcontrolparameter,whichpromisessteadyoperationofthesystemanddominatesthisprocess.Threedifferentinfluentflowdistributionmethodsproposedinthispaperinclude:(i)sameF/Mratiotonitrifiers;(ii)optimalcoefficientand(iii)voluminousinfluentattheendofsystem.Basedonthedistributionmethodspresentedabove,atechnicallyfeasibleandeconomicallyfavorableexpertcontrolsystemofflowdistributionwasestablishedonthebasisofthedataobtainedfromapilot-scaledomesticwastewatertreatmentsystem.Therelatedinformationfromliteratureandtheknowledgeofhumanexpertsacquiredthroughyearsofexperiencewerealsoincorporated.Thesuggestedinfluentflowdistributionmethoddefinedbyexpertsystemisdirectlydecidedbyinfluentloadingandrawwastewatercharacteristics,aswellaseffluentquality.Finally,theapplicationofthisexpertsystemwasillustratedbyusingoneday'sdatafromarealplant,whichrepresentsthetypicalchangesofinfluentflowsandwastewatercharacteristics.Keywords:wastewater;biologicalnitrogenremoval;step-feed;influentflowdistribution;expertsystem2008-02-25收到初稿,2008-07-03收到修改稿。联系人:彭永臻。第一作者:王伟(1979—),女,博士研究生。基金项目:国家高技术研究发展计划项目(2006AA06Z319);北京市教委科研基地-科技创新平台项目;高等学校博士学科点专项科研基金项目(20060005002)。Receiveddate:2008-02-25.Correspondingauthor:Pro