醋酸酯淀粉和SPAN80在反硝化缓释碳源中的应用_王润众

书醋酸酯淀粉和SPAN80在反硝化缓释碳源中的应用王润众，郝瑞霞，赵文莉(北京工业大学建筑工程学院水质科学与水环境恢复工程北京市重点实验室，北京100124)摘要:为了提高淀粉/聚乙烯醇(PVA)缓释碳源的脱氮效率，并有效控制碳源的释放速率，对缓释碳源基材组分进行了改进，采用醋酸酯淀粉替代普通淀粉，并添加疏水性乳化剂(SPAN80)，通过静态脱氮和释碳试验，考察了缓释碳源脱氮性能和释碳速率的变化。结果表明，醋酸酯淀粉替代普通淀粉可以显著改善缓释碳源的品质，醋酸酯淀粉/PVA体系比普通淀粉/PVA体系的反硝化速率提高4倍之多，分别为0．085、0．016mg/(g·h)。在醋酸酯淀粉/PVA体系中添加其质量5%的SPAN80，在保持较高脱氮效率的同时，能够有效降低出水COD浓度的幅度在15mg/L以上，并减弱碳源表面的水解腐蚀程度。因此，醋酸酯淀粉和乳化剂的使用，能够提高缓释碳源的脱氮效率，并降低碳源的释放速率。关键词:缓释碳源;醋酸酯淀粉;疏水性乳化剂;PVA;释碳速率;反硝化中图分类号:X703文献标识码:A文章编号:1000－4602(2015)07－0013－05基金项目:国家自然科学基金资助项目(51178005)通信作者:郝瑞霞E－mail:haoruixia@bjut．edu．cnApplicationofSPAN80andStarchAcetateinSlow-releaseCarbonSourceforDenitrificationWANGＲun-zhong，HAOＲui-xia，ZHAOWen-li(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalＲecoveryEngineering，CollegeofArchitectureandCivilEngineering，BeijingUniversityofTechnology，Beijing100124，China)Abstract:Toimprovethenitrogenremovalefficiencyofstarch/polyvinylalcohol(PVA)，andef-fectivelycontrolthecarbonreleaserate，thematerialcompositionofslow-releaseorganiccarbonsource(SOC)wasimprovedbyreplacingthetraditionalstarchwiththestarchacetateandaddingthehydropho-bicemulsifier(SPAN80)．Thecharacteristicsofdenitrificationandtherateofcarbonreleasewerestud-iedincarbonreleaseanddenitrificationexperimentsinlaboratoryscale．Theresultsshowedthatthequal-ityofSOCcouldbesignificantlyimprovedbyreplacingthetraditionalstarchwithstarchacetate．Therateofdenitrificationinstarchacetate/PVAsystemwas4timeshigherthanthetraditionalstarch/PVAsys-tem，andtheywere0．085mg/(g·h)and0．016mg/(g·h)respectively．When5%ofSPAN80wasaddedintothestarchacetate/PVAsystem，theCODintheeffluentcouldbeeffectivelyreducedbymorethan15mg/Lwithkeepingthehighefficiencyofdenitrification，andthehydrolysiscorrosiononthesur-faceofcarbonsourcewasreduced．Therefore，theuseofstarchacetateandemulsifiercouldimprovethenitrogenremovalefficiencyofthestarch/PVAslow-releasecarbonsourceandreducethereleaserateof·31·第31卷第7期2015年4月中国给水排水CHINAWATEＲ＆WASTEWATEＲVol．31No．7Apr．2015thecarbonsource．Keywords:slow-releas