后置反硝化工艺处理高氨氮农药废水的研究
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2020-05-26 21:48:59
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2017年第43卷第12期December2017工业安全与环保IndustrialSafetyandEnvironmentalProtection·63·后置反硝化工艺处理高氨氮农药废水的研究杨海燕卢雪枫朱浩君。王莹莹4(1.内蒙古农业大学职业技术学院内蒙古包头014109;2.内蒙古科技大学能源与环境学院内蒙古包头014010;3.中丹康灵(北京)生物技术有限公司北京100085;4.安徽富田农化有限公司安徽池州247100)摘要采用特异性移动床生物膜反应器(SMBBR)结合后置反硝化技术处理高氨氮农药废水,SMBBR选用亲水性更强的SDC—O3型填料和特异性DNF409混合菌种,可以实现同步硝化反硝化脱氮。试验考察了DNF409菌种对填料挂膜的影响,不同C/N比对脱氮的影响以及对COD、氨氮、TN的去除率的影响。结果显示,当水力停留时间为8d,进水COD质量浓度为2408—7440mg/L,氨氮质量浓度为160.21~433.84mg/L,TN质量浓度为208.27~537.65mg/L,pH值为7.0~8.5时,AF中外加碳源C/N比值为5时,出水COD质量浓度平均为341.9mg/L,平均去除率高达92.3%,氨氮质量浓度保持在3.0mg/L以内,去除率在98%以上,TN质量浓度稳定在40—45ms/L,去除率在80%以上,达到了《污水综合排放标准》(GB8978-1996)的三级标准。关键词SMBBR后置反硝化高氨氮农药废水外碳源Post--denitrificationProcessforPesticidesWastewaterwithHighAmmonia—-nitrogenTreatmentYANGHaiyanLUXuefengZHUHaojanWANGYingying4(1.VocationalandTechnicalCollegeofInnerMongoliaAgriculturalUniversityBaotou,InnerMongolia014109)AbstractThenewprocesscombiningspecificmovingbedbiofilmreactor(SMBBR)withpost—denitrificationis印一pliedinthetreatmentofpesticideswastewaterwithhighammonia—nitrogenandthesimultaneousnitrificationanddenitrificationcanberealized,inwhichbetterhydrophilicSDC一03typepackingandspecificDNF409mixedbac—teriaarechosen.nleefectsofDNF409strainsonthebiofilmformationandtheremovaleficiencyofdenitrificationⅥ,ithdiferentC/Nratiosareinvestigated,aswellastheremovalratesofCOD,ankmonianitrogenandTNarealsostud-ied.Theresultsshowthat,whenHRT8d,theinfluentflowCOD2408—7440mg/L,ammonia—nitrogen160.21—433.84mg/L,TN208.27~537.65mg/L,pH7.0~8.5,andcarbonsourceC/Nis5inanaerobicbiologicalfilter,theaverageefluentCODis341.9mg/L,theaverageremovalrateofammonianitrogencanreachashighas92.3%,withlessthan3mg/L,theremovalrateisabove98%,TNstableat40—45mg/Landremovalrateisabove80%.n1eefluentwaterqualitymeetsthe3rdgradeoftheemissionstandardoftheIntegratedWastewaterDischargeStand—ard(GB8978—1996).KeyWordsSMBBRpost—denitrifieationpesticideswastewaterwithhighammonia—nitrogenexternalcarbonSOUIree0引言安徽某农药制造厂生产废水主要为杀虫剂和除草剂废水,特点是氨氮含量高、毒性高、成分复杂、B/C低,该厂现有废水处理工艺为AO,主要存在HRT过长,出水COD、氨氮、TN
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