某城镇污水处理厂工艺初步设计中英文摘要

I摘要本次毕业设计是对H市某城镇5万m3/d城市污水处理厂进行工艺初步设计。主要任务是完成一个该污水处理厂工艺流程初步设计和单项处理构筑物设计，并完成完成设计说明书，污水处理厂总平面图，高程图及各单项处理构筑物设计图。该污水处理厂设计规模为5万m3/d。由于该设计对脱氮除磷有要求故应选取二级强化处理，且根据该地区进出水水质要求，确定工艺为A2/O工艺。该工艺的生物处理部分由厌氧池、缺氧池和好氧池组成。厌氧池主要功能是释放磷,同时部分有机物进行氨化。缺氧池的主要功能是脱氮。好氧池能够去除BOD、硝化和吸收磷。该污水厂的污水处理流程设计为：从泵房到沉砂池，进入A2/O反应池，进入辐流式二次沉淀池，再进入消毒池，最后出水；污泥流程设计为：从反应池排出的剩余污泥进入集泥配水井，再由污水泵送入浓缩池，然后进入贮泥池，再进入脱水机房脱水，最后外运处置。关键词：城镇污水；脱氮除磷；二级强化处理；A2/O工艺；工艺设计IIABSTRACTThetopicofthisgraduatedesignisaboutthedesignofthesewagetreatmentplantintheareaofH.Themaintaskistheprimarydesignoftheplantandthesingleitemprocessingconstructiondrawingdesign.Theharvestoftheprimarydesignarenotonlydesignbook、siteplanofthesewagetreatmentplant、theelevationdrawingsofthetreatmentofsludgeandsewagebutalsothesingleitemprocessingconstructiondrawingdesign.Theconstructionofthisplantis50000tonsperday.Causethisdesignhasdemandsontakingoffthenitrogenandthephosphorus,theplantisdesignedtotakeupgradedsecondarytreatment;andbecauseofthewaterqualityoftheinflowandtheizumi,thisdesigndecidestousetheAnaerobic-Anoxic-Oxic.ThebiologicaltreatmentpartoftheAnaerobic-Anoxic-Oxicconsistsofanaerobicpond,anoxicpond,andaerobicpond.Theanaerobictankreleasesphosphorus,atthesametimesomepartsoforganicmatterwereammoniated.Themainfunctionoftheanoxicpondisdenitrification.Theaerobicpondismultifunctional;itcanremoveBOD,makenitratlonreactionsandabsorbphosphorus.Theprocessofthesewageintheplantisthat:thesewagerunsfrompumphousetosandsinkingpond,entersthepondofsedimentationtank,entersdisinfectionpond,atlastletsout.Theprocessofthesludgeisthat:surplussludgefromthesedimentationtankentersconcentrationpond,enterssludgestoragetank,thenentersdehydrationmachineroom,atlastitiscarriedoutoftheplant.Keywords:townsewage;takingoffthenitrogenandthephosphorus;upgradedsecondarytreatment;theAnaerobic-Anoxic-Oxic;processdesign