气浮_活性污泥工艺处理制药废水_赵庆良

气浮—活性污泥工艺处理制药废水赵庆良1,蔡萌萌1,刘志刚1,CHUAHong2(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090;2.香港理工大学土木及结构工程系,香港)摘要:哈尔滨某制药厂生产废水的水质、水量随产品及生产工艺的不同而变化,波动较大,成分复杂且缺乏氮、磷。采用“加压溶气气浮—完全混合推流式活性污泥(串联CMAS曝气池)”工艺处理该厂废水,经过10个月的生产性试验研究确定了各单元的最佳操作条件,确保了系统出水水质达到《污水综合排放标准》(GB8978—1996)的一级标准,曝气池中污泥具有良好的活性,平均比好氧速率(SOUR)=49.5mgO2/(gMLSSh)。针对运行中出现的异常现象并结合废水特性和运行条件,提出了加大气浮池投药量、对进水进行稀释、增大曝气量和污泥回流量等解决措施,可为类似废水处理工程的设计和运行提供借鉴。关键词:制药废水;溶气气浮;完全混合推流式活性污泥法;污泥活性中图分类号:X703.1文献标识码:C文章编号:1000-4602(2006)01-0077-03PharmaceuticalWastewaterTreatmentwithDAF-ActivatedSludgeProcessesZHAOQing-liang1,CAIMeng-meng1,LIUZhi-gang1,CHUAHong2(1.SchoolofMunicipal＆EnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.Dept.ofCivil＆StructuralEngineering,HongKongPolytechnicUniversity,HongKong,China)Abstract:ThepharmaceuticalwastewatercharacteristicsofapharmacyplantlocatedinHarbinchangealongwithitsproductsandmanufacturingprocesses.Wastewaterflowrateandqualityfluctuategreatlyanditcontainscomplexcompoundsandislackofnitrogenandphosphorous.Basedontheanaly-sisofthispharmaceuticalwastewater,atreatmentprocessconsistingofdissolvedairflotation(DAF)andcompletelymixedactivatedsludge(CMAS)systemwasdesignedandputintooperation.Afull-scalestudylastingfor10monthswasperformedtoinvestigatetheperformanceoftreatmentsystem.TheresultsindicatethattheeffluentmeetsthefirstlevelcriteriaoftheIntegratedWastewaterDischargeStandard.Theactivatedsludgeintheaerationtankshasgoodactivity,withaveragespecificoxygenutilizationrate(SOUR)of49.5mgO2/(gMLSSh).Toeliminatetheabnormaloperationofthesystem,wastewatercharacteristicsandoperationconditionswerediagnosedandeffectivesolutionswereproposed,suchasin-creaseofchemicaldosagetotheflotationtank,dilutionofrawwastewaterandadjustmentofreturnedacti-vatedsludgerates.Theresultsobtainedfromthisstudyareusefulforthedesignandoperationofsimilarpharmaceuticalwastewatertreatmen.tKeywords:pharmaceuticalwastewater;dissolvedairflotation;completelymixedactivatedsludgeprocess;sludgeactivity77第22卷第1期2006年1月中国给水排水CHINAWATER＆WASTEWATERV