成都理工大学工程技术学院毕业论文某焦化废水治理工艺设计作者姓名：XXX专业名称：环境工程指导教师：XXX讲师某焦化废水治理工艺设计摘要焦化废水中含有大量的氨氮以及多种有毒的有机化合物，如多环芳烃等成分复杂的化合物。从组成成分上讲，焦化废水必然会造成环境废染、影响人体健康。处理焦化废水的方法有许多，生物法以其在经济上可行性较好的特点而得到广泛应用。本文为某焦化废水处理工艺设计，规模为300立方米/日。废水处理流程为：进厂废水从泵房到隔油池，然后流入气浮池，气浮池出水进入调节池，调节池出水进入A/O反应池，再进入二次沉淀池，二次沉淀池出水进入混凝沉淀池，最后出水。污泥处理的流程为：从二沉池以及混凝沉淀池排出的剩余污泥进入污泥浓缩池，再进入污泥脱水间，最后外运处置。废水处理后的出水优于国家《综合废水排放标准》(GB8978-1996)一级标准。选择A/O工艺处理焦化废水，在脱氮方面的效率要明显高于SBR法以及CASS氧化沟等方法。关键词：A/O工艺；焦化废水；脱氮某焦化废水治理工艺设计AbstractCoke-plantwastewatergeneratedfromcoal-cookingprocessescontainshighlevelsofNH3-N.ApartfromNH3-Ncoke-plsntwastewatercontainsvariousgroupsoftoxicorganiccompoundssuchaspolynucleararomatichydrocarbons(PAHs)andheterocycliccompounds.Fromacompositionalpointofview,colk-plantwastewaterthereforepresentsadverseenvironmentalandheltheffects.Severalmethods(physic-chemicalandbiologicalmethods)havebeenemployedintheremovalofNH3-NandCODfromcoke-plantwastewater.Thebiologicalmethodsaremostoftenemployedbecauseoftheireconomicaadvantagesoverphysical-chemicalmethods.Thisarticleisadesignofoneprojectforthetreatmentofcoke-plantwastewater.Theconstructionofthisprojectis300m3perday.Theprocessisthat:thewastwaterrunsfrompumphousetogreasetrap,enterstheflotationtank,entersregulationpool,thenentersA/Oreactortank,entersthesecondarysedimentationtank,thenentersthecoagulationandsedimentationtank,atlastletsout.Theprocessofthesludgeisthat:thesurplussludgefromthesedimentationtankenterssludgethickener,thenentersdehydrationhouse,thenitisdehydrated,atlastitiscarriedoutoftheplant.TheoutletwateroftheplantmeetstheleveloneoftheNationalDischargeStandardofSteelindustrystandardsforwaterpollutants(GB8978-1996).SelectingtheAnoxic-Oxicsystemforthetreatmentofcoke-plantwastewaterismoreefficientthanthecraftofSBRandthecraftofCASSetc.Itcantakelargequantityofthenitrogenfromcoke-plantwastewater.Keywords：TheAnoxic-Oxic;Cokeplantwastewater;Takingoffthenitrogen目录摘要.................................................I某焦化废水治理工艺设计ABSTRACT.............................................II目录................................................III前言..................................................11焦化废水概述........................................21.1焦化废水概况....................................21.1.1焦化废水来源与组成..........................21.1.2焦化废水的特点及危害........................41.2国内外焦化废水处理技术..........................51.2.1物理化学法..................................61.2.2生化处理法..................................71.2.3化学处理法..................................82水质分析和处理工艺选择..............................92.1建厂当地自然条件.................................92.1.1来源组成......................................92.1.2水质特征.....................................102.1.3排放量......................................102.2排放标准........................................112.3.1焦化废水水质..................................112.4处理工艺的选择..............
