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I摘要随着国家对环保问题的重视，水污染问题正被提出研究，目前水处理主要对象是高浓度有机废水和富营养化废水。而对含盐废水的处理研究还相对较少，本设计根据当地的情况结合自身所学的情况来设计，针对榨菜行业高盐、高COD、高BOD废水治理难度较大，工程量较大等特点，进行方案设计。榨菜生产废水COD高达3000mg/L，盐度、有机物浓度及氮、磷浓度均很高，直接排放严重影响了当地水体水质和生态环境，对当地民众的身体健康和生活带来不良影响。需对榨菜生产过程中产生的废水进行治理达标后排放。过程包括对处理设备的计算，最终达到国家的一级排放标准。尤其是含盐量要降到灌溉用水标准，因为这个问题正是困扰榨菜厂发展的瓶颈问题。设计污水处理能力为10m3，属于小型污水处理厂。本设计采用A/O好氧厌氧法处理市污水，其特点是工艺流程简单，构筑物少；处理效果稳定，出水水质好；污泥产生量少，污泥的性质稳定。设计中对污水处理工艺和污泥处理方案进行了选择论证；对污水、污泥处理构筑物进行了工艺设计计算；对废水处理厂进行了平面、高程布置，并绘制了平面布置图、高程图。关键词含盐废水；两段式生物处理工艺；污水处理IIAbstractWiththenation'sattentiononenvironmentalissues,waterissuesarebeingputonthemaintargetofthecurrenttreatmentofhighconcentrationorganicwastewaterandwastewatereutrophication.Thestudyonthesalinitywastewatertreatmentarerelativelysmall,thisdesigncombinesthelocalcontextlearnedaboutthesituationintheirowndesignforindustry,high-saltmustard,highCOD,highBODwastewatertreatmentdifficult,andsoargequantitiescharacteristics,programdesign.WastewaterCODmustardupto3000mg/L,salinity,organicmatterandnitrogenconcentrations,phosphorusconcentrationsarehigh,directdischargeofaseriousimpactonlocalwaterqualityandecologicalenvironment,localpeople'sphysicalhealthandadverseeffects.Begeneratedonthemustardproductionprocesswastewaterdischargedtotreatmentcompliance.Theprocessinvolvesthecalculationoftheprocessingequipmentandfinallynationallevelemissionstandards.Inparticular,toreducedirrigationwatersalinitystandards,becausetheproblemisbesetthedevelopmentofmustardplantbottlenecks.Designsewagetreatmentcapacityof10m3,isasmallsewagetreatmentplant.ThisdesignusesA/OAerobicandAnaerobicTreatmentofmunicipalsewage,whichischaracterizedbyasimpleprocess,lessstructure;treatmentefficiencyandstability,goodwaterquality;lesssludge,sludgeisstable.Designofthesewagetreatmentprocessandsludgetreatmentprogramswereselecteddemonstration;onsewagesludgetreatmentprocessdesignstructureswerecalculated;onwastewatertreatmentplantswereflat,elevationlayout,anddrawafloorplan,elevationplan.Keywordssaltwater,Two-stagebiologicaltreatmentprocess,sewagetreatment1目录摘要...........................................................IAbstract..........................................................II引言..............................................................11设计原始资料.....................................................42工艺方案的选择与确定.............................................52.1废水特性分析..................................................52.2富盐有机废水处理技术主要内容..................................52.3废水物化处理工艺选择..........................................62.4废水生化处理工艺..............................................62.5生化处理后的后续处理..........................................72.6污泥处置......................................................83废水处理工程工艺流程.............................................93.1废水处理工艺流程说明.........................................103.2预期处理效果.................................................114设备构筑物规格一览表............................................125污水处理系统的主要工艺计算......................................155.1污水水量及水质...............................................155.2混合污水水质.................................................155.3污水处理程度.................................................155.4污水处理设计计算.............................................155.4.1格栅......................................................155.4.2调节池....................................................175.4.3O1/A池计算..............................................175.4.4O2池主要尺寸.............................................185.4.5竖流沉淀池................................................215.4.6双层过滤池................................................235.4.7接触消毒池................................................246污水处理站投资估算..............................................256.1土建部分估算.................................................256.2设备器材部分估算.............................................256.3间接费用.....................................................267主要技术经济指标分析............................................277.1废水处理工艺和电控新技术.....................................277.2废水处理经济分析.............................................278污水处理厂的总体布置............................................288.1平面布置.....................................................2828.2高程布置.....................................................289供电及自动控制系统..............................................309.1供电系统.....................................................309.2仪表自动化系统...............................................309.3自动控制.....................................................309.4仪表系统.....................................................3010辅助建筑、道路绿化及安全防护...................................32参考文献.........................................................33谢辞............................................错误!未定义书签。附图.............................................................343引言随着国家经济建设的进一步深化，在经济建设的同时，环境问题也日益表现出来。尤其是水污染问题，淡水资源的污染日益严重，河流污染形势严重。在47个环保重点河段中,29.8%为类于Ⅴ类水质。2006年，全国地表水总体水质属中度污染，松花江、黄河、淮河为中度污染，辽河、海河为重度污染。国家监测的744个断面中，劣V类的近1/3，重点流域超过40%的断面水质未达到治理要求，流经城市的河段普遍受到污染。水资源利用效率低。全国农业灌溉水的利用系数平均仅为0.45，而国外先进水平为0.7-0.8。工业用水的重复利用率与发达国家相比