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1、学号:05XingtaiPolytechnicCollege毕业论文GRADUATETHESIS论文题目:浅谈A2/O工艺在焦化废水中的应用学生姓名:专业班级:环境监测与治理技术081班院系:资源与环境工程系指导教师:2011年5月22日目录摘要1ABSTRACT2引言31水质42A2/O工艺42.1A2/O工艺原理42.2A2/O工艺的特点52.3A2/O工艺技术特点与处理结果52.4A2/O工艺运行的异常问题及对策63焦化厂中A2/O工艺的运行63.1工艺调试63.1.1七台河某焦化厂63.1.2辽宁某钢厂焦化废水73.2运行影响因素和故障解决措施83.2.1A2/O脱氮除磷系统的影响
2、因素83.2.2基本信息93.2.3调试期间出现的主要问题103.2.4问题原因分析103.2.5解决措施12结论13致谢14参考文献1522摘要焦化废水中的COD、氨氮、磷的浓度普遍很高,DO/COD大概是0.2—0.4,而且毒性大、可生化性差,是成分较复杂的难处理的工业废水,传统的活性污泥处理工艺能有效地去除污水中的BOD5和SS,但不能有效地去除污水中大量的氮和磷。如果含氮、磷较多的污水排放到湖泊或海湾等相对封闭的水体,就会产生富营养化,从而导致水体水质恶化或湖泊退化,影响其各种功能。A2/O工艺是传统活性污泥工艺、生物硝化及反硝化工艺和生物除磷工艺的综合。所以A2/O(厌氧-缺氧-
3、好氧)是同步生物脱氮除磷工艺的一种,能有效的解决焦化污水中氮、磷含量高的问题。但由于焦化废水自身毒性大、难降解并且水质水量波动较大,而废水处理站的管理能力有限,国内目前现运行的焦化废水处理站存在很多问题,实际达标排放率很低。22关键词:焦化废水;活性污泥;A2/O工艺;脱氮除磷ABSTRACTGenerally,theconcentrationofCOD,NH3—N,phosphorusincokingwastewaterisveryhigh.DO/CODisabout0.2-0.4.Withthelargetoxicityandbadbiochemical,cokingwastewate
4、rbecomethekindofindustrywastewaterthathascomplicatedingredient.Bythetraditionalactivatedsludgedealingprocess,BOD5andSScanberemovedfromwastewater,besidesthesignificantnitrogenandphosphorus.Ifthewastewaterwithmuchnitrogenandphosphorusispouredintoarelativeclosedwaterbody,suchasapooloragulf,eutrophica
5、tionwilloccur,whichwillleadthatthewaterqualitydeterioratesandthepooldegenerates,thenthevariousfunctionshallbeaffected.TheA2/Oprocessingistheintegrationoftraditionalactivatedsludgeprocess,biologynitrification,denitrifyingprocess,andbiologyphosphorusdeductionprocess.So22theA2/Oprocessingisoneoftheni
6、trogenphosphorusremovalprocess.A2/Oprocessing(Anaeroxic-Anoxic-Oxic)cansolvetheproblemthatthecontentofnitrogenandphosphorusincokingwastewaterisveryhigh.Becauseofthelargetoxicityhard-degradation,thelargerfluctuationofwaterqualityandwaterquantity,andthelimitedmanagementabilityofwastewaterdisposalsta
7、tion,thecurrentcokingwastewaterdisposalstationhasalotofproblemsandthatisthelowdischargingrateofactualstandard.Keywords:cokingwastewater,activatedsludge,A2/Oprocessing,nitrogenphosphorusremoval22引言无论在国内还是在国外,焦化工业一