某制药废水处理工艺运行分析

某制药废水处理工艺运行分析*熊贞晟1，2刘锐2张永明1陈吕军2(1.上海师范大学生命与环境科学学院，上海200234;2.浙江清华长三角研究院生态环境研究所，浙江嘉兴314006)摘要:简要介绍了某化学合成制药废水处理工艺流程和主要运行参数，通过采集现场数据和SBR小试试验对其进行了分析。运行数据表明:现有工艺COD去除率68.9%，其中一级好氧去除62.6%，水解CASS组合去除6.3%;后续水解酸化对废水的可生化性没有改善，导致其和CASS的组合COD去除效果不佳，效费比低。温度对该工艺有重要影响，夏季水温可达43℃，严重影响出水水质。SBR小试结果表明:2%以下的盐度及其他可能基于浓度抑制的物质对好氧生化过程的COD去除没有影响，进一步对废水进行稀释没有意义。SBR小试以不到实际工艺一半的HRT，取得了明显优于后者的出水，意味着实际工艺有较大的改善潜力。关键词:制药废水;COD;盐度;温度OPERATIONANALYSISOFAPHARMACEUTICALWASTEWATERTREATMENTPROCESSXiongZhensheng1，2LiuRui2ZhangYongming1ChenLüjun2(1.CollegeofLifeandEnvironmentScience，ShanghaiNormalUniversity，Shanghai200234，China;2.DepartmentofEnvironmentalTechnologyandEcology，YangtzeDeltaRegionInstituteofTsinghuaUniversity，Jiaxing314006，China)Abstract:Achemicalsynthesis-basedpharmaceuticalwastewatertreatmentprocessanditsmainoperationparameterswerebrieflyintroduced.FieldoperationdatawascollectedandbenchscaleSBRtestwasconductedtoanalyzetheefficiencyoftheexistingtreatmentprocess.Theoperationdatashowedthat68.9%ofCODwasremovedbytheexistingtreatmentprocess，inwhichfirstaerobicremoved62.6%andhydrolyticacidificationandCASShybridprocessremovedonly6.3%.Thehydrolyticacidificationfailedtoimprovethebiodegradability，causinglittleCODwasremovedbyitscombinationwithCASSprocess，andtheeffective-costratewasverylow.Watertemperaturestronglyaffectedthetreatmentefficiency.Insummeritcouldreachto43℃andtheeffluentqualitywasseriouslydeteriorated.BenchscaleSBRtestshowedthatsalinitylessthan2%andotherconcentrationbasinginhibitionsubstancesdidnotaffecttheCODremovalrateinaerobicbiologicalprocess，soitmadenosensetofurtherdilutethewastewater.TheHRTofthebenchscaleSBRtestwaslessthanhalfoftheexistingprocess，buttheeffluentqualitywasbetterthanthatoftheexistingprocess，whichmeansthattheexistingprocessstillhasgreaterroomforoptimization.Keywords:pharmaceuticalwastewater;COD;salinity;temperature*国家“十一五”科技支撑计划(2006BAC02A16);嘉兴市科技计划项目(2007AY1016)。制药废水COD高，盐度高，营养源不足，一些原料和产物具有生物毒性或难生物降解特征。实践中常先对废水进行一定程度的稀释，消除各类物质高浓度时对微生物的抑制作用，以实现对有机物的良好降解，提高处理效果［1-2］;但投资大、运行