广东工业大学毕业设计设计总说明本设计为3000m3/d的造纸废水的工程设计。根据该造纸废水的水质特点和水量，参考造纸废水处理的经验资料，采用较新的DAF气浮法—UASB—生物接触氧化工艺，并进行经济、技术及环境效益的对比。DAF气浮法适合用于处理造纸纸浆，悬浮物去除率为90%以上，工艺流程和设备结构比较简单；UASB有机容积负荷高，占地面积小，能耗低，可以回收沼气，剩余污泥量少，污泥脱水容易，运行管理简单；生物接触氧化池具有较高的容积负荷，污泥产量较低，颗粒较大,易于沉淀，无需污泥回流，不存在污泥膨胀问题，也不产生滤池蝇。本工程采用的DAF气浮法—UASB—生物接触氧化工艺，具有技术成熟、稳定、节能、占地少且效率高等特点，建设投资成本为两百五十多万元，成本合理，平均吨水运行费为0.558元/吨，费用低廉。采用该工艺处理造纸废水后，能使出水水质达到广东省造纸废水污染物排放标准的要求。关键词：造纸废水，DAF气浮法，UASB，接触氧化法DesignintroductionPresentisthedesignofthetreatmentprojectofpaperwastewaterwiththeamountof3000m3/d.Distinguishingfeatureonthebasisofformerexperienceandstatistics,andthroughthecomparisonontheeconomic,technologicandenvironmentalbenefit,chosePressureDissolvedAirFlotation－UASB－biologicalcontactoxidationtechnology.PressureDissolvedAirFlotationissuitablefordealingwithpaperpulp.Theremovalrateofsuspendedsolidsisabove90%.Technicsprocessandequipmentstructuresarerelativelysimple.UASBhaveahighorganicvolumeloaditoccupiessmallareaandhaslowenergyconsumption.GascanberecoveredAlso.UASBproducelittleresidualsludge.Thesludgedewateringiseasy.Theoperationandmanagementaresimple.Biologicalcontactoxidationhasahighervolumeload,lowsludgeproduction,largeparticlesandprecipitatingeasily.Itdoesn'tneedsludgereturning,andthereisnosludgebulkingproblemanddoesnotproducefilterflies.PressureDissolvedAirFlotation－UASB－biologicalcontactoxidationtechnologyisripe,steady,lessenergyconsumption,takinglessareaandhighefficiency.Theinvestmentcostisabout2.5millionyuan,whithisreasonable.Theaveragewaterrunningcostis0.558yuan/ton,whithislow.thedischargedwatercanmeettheemissionlimitsofpaperwastewaterinGuangdongprovince.Keywords:PaperwastewaterPressureDissolvedAirFlotationUASBContactoxidationmethod目录TOC\o"1-4"\h\z\uHYPERLINK\l"_Toc169147387"1项目概述PAGEREF_Toc169147387\h1HYPERLINK\l"_Toc169147388"2设计规模和目标PAGEREF_Toc169147388\h2HYPERLINK\l"_Toc169147389"2.1设计处理废水水量PAGEREF_Toc169147389\h2HYPERLINK\l"_Toc169147390"2.2设计进水水质和出水水质PAGEREF_Toc169147390\h2