a2o工艺污水处理厂毕业设计

目录摘要..........................................................................................3Abstract.......................................................................................4第一章设计概论........................................................................61.1设计依据和任务....................................................61.2设计目的...........................................................7第二章工艺流程的确定............................................................82.1工艺流程的比较....................................................82.2工艺流程的选择...................................................11第三章工艺流程设计计算.......................................................123.1设计流量的计算...................................................123.2设备设计计算.....................................................123.2.1格栅.........................................................123.2.2提升泵房......................................................133.2.3沉砂池........................................................143.2.4初沉池........................................................153.2.5A2/O.........................................................163.2.6二沉池........................................................213.2.7接触池和加氯间................................................243.2.8污泥处理构筑物的计算..........................................253.3构建筑物和设备一览表............................................27第四章平面布置.......................................................................294.1污水处理厂平面布置..............................................294.1.1平面布置原则..................................................294.1.2具体平面布置..................................................314.2污水处理厂高程布置...............................................324.2.1主要任务......................................................324.2.2高程布置原则..................................................324.2.3高程布置结果..................................................33第五章供电仪表与供热系统设计........................................385.1变配电系统..........................................................385.2监测仪表的设计......................................................38第六章劳动定员.....................................................................396.1定员原则............................................................396.2污水厂人数定员......................................................39第七章参考文献.......................................................................40致谢.............................................................................................41英文原文与文献..................................................42摘要以作为某开发区污水处理厂的初步设计和施工图设计。该处理厂处理城市污水，且水质较复杂：五日生化需氧量（BOD5）：140mg/L；悬浮物（SS）：200mg/L；化学需氧量（crCOD）：260mg/L；NH3-N：30mg/L；处理后的水质要求；BOD5≤20mg/L；SS≤20mg/L；crCOD≤60mg/L；NH3-N≤15mg/L；根据设计要求和求新的思想，该污水处理工程进水中氮含量均偏高，在去除BOD5和SS的同时，还需要进行脱氮处理，故采用当代水处理工艺中较流行的2/AO工艺。2/AO工艺由于不同环境条件，不同功能的微生物群落的有机配合，加之厌氧、缺氧条件下，部分不可生物降解的有机物能被开环或断链，使得N、P、有机碳被同时去除，并提高对不可降解有机物的去除效果。它可以同时完成有机物的去除，硝化脱氮、磷的过量摄取而被去除等功能，脱氮的前提是NH3－N应完全硝化，好氧池能完成这一功能，缺氧池则完成脱氮功能。厌氧池和好氧池联合完成除磷功能。此外该工艺还具有高效、节能的特点，且耐冲击负荷较高，出水水质好。因此,更具有广泛的适应性，完全适合本设计的实际要求。本工艺的主要构筑物包括格栅、污水泵房、平流沉砂池、好氧池、厌氧池、缺氧池、二沉池、接触消毒池、浓缩池、污泥脱水机房等。本设计采用了2/AO为主体工艺，工艺流程相对简单，省去了污泥消化系统，节省了基建投资和运行费用，该工艺处理污水运行稳定，易于管理，出水水质达到设计要求，真正做到了污水的综合利用。关键词：2/AO格栅泵房新工艺二沉池AbstractItisapreliminarydesignandconstructiondrawingforthesewagetreatmentplantdevelopmentzone.Thisplanttreatsmunicipalsewagemainly.Itswaterqualityismorecomplicated:Suspendedsubstance(SS):200mg/L;Thebiochemicaloxygendemandoffivedays(5BOD):140mg/L;Thechemicaloxygendemand(crCOD):260mg/L;NH3-N:30mg/L;Treatedwaterqualityisrequired:5BOD≤20mg/L;SS≤20mg/L;crCOD≤60mg/L;NH3-N≤15mg/L;Accordingtothedesigningrequirementandthoughtoflookingfornovelty:thecontentofnitrogeninthemunicipalsewageisonthehighsideinthisproject.sowhilegettingridof5BODandSS,itshouldbetreatedwithaproperprocess.Weadoptanduseakindofcraft,whichisacomparativelypopularcraftatpresentnamedAnaerobic-Anoxic-Oxic.Theadvantageofthiscomprehensivecraftisextensiveadaptability,totallysuitableforrealityoriginallydesignedpurpose.Itsmainstructuresincludesgatewell,grid,sewagepumpinghouse,earateandsinkingsandpool,oxidizingditch,thesecondsinkingpool,contactingpool,concentrationtank,mudtodehydrateinthecomputerlabetc.Processduetodifferentenvironmentalconditions,differentfunctionsofmicrobialcommunitiesintheorganic,combinedwithanaerobic,anoxiccondition,somenon-biodegradableorganicmattercanbeopenorbrokenchain,makingN,P,organiccarbonisalsoremoved,andtoenhancenon-degradableorganicremoval.Itcansimultaneouslyremoveorganicmatter,nitrificationanddenitrification,excessiveintakeofphosphoruswasremovedandotherfunctions,providedthatremovalofNH3-Nshouldbefullynitrification,aerobictanktocompletethefunction,oxygentankiscompleteremovalfunction.AnaerobictankandaerobicphosphorusremovalcapabilitiestocompletethejointpoolThisdesignhaveadoptedthepracticalcraftandequipmentofgoodperformance,andtheprocedureissimple,managementisconvenient,donotneedtoaddthefirstsinkingpool,digestivesystem.reducingbuildingandoperatingexpenses,realizingautomationtotallyatthesametime,easytomanage,maki