复合固定化微生物脱氮动力学模型研究  

STUDY ON KINETICS MODEL OF REMOVAL AMMONIA NITROGEN WITH COMPLE IMMOBILIZED BACTERIA

作　　者：李芳芳[1] 齐树亭[2] 石玉新[2] 李军冲[1] 吕玉珊[1] 

机构地区：[1]河北工业大学生物化工学院,天津300130 [2]河北工业大学海水高效利用化工技术教育部工程研究中心,天津300130

出　　处：《水处理技术》2011年第8期48-52,共5页Technology of Water Treatment

基　　金：河北省重大技术创新项目(08220502Z);河北省教育厅科学研究计划(Z200941)

摘　　要：以聚乙烯醇、海藻酸钠加活性炭为载体,对硝化和反硝化细菌进行固定,开展硝化和反硝化试验,通过正交试验优化脱氮条件,并分析内扩散影响,建立动力学模型。结果表明,菌体质量分数2.5%,活性炭比重为1%,温度32℃,pH 8.0,脱氮效率达88.35%;内扩散对反应影响可以忽略,可用Monod方程表示反应动力学,动力学参数vmax=2.47×10-3 mg.L-.1s-1,Km=481.38 mg.L-1。The nitrosobacteria and denitrobacteria were immobilized in the carrier made up of polyvinyl alcohol,sodium alginate and activated charcoal to conduct the nitrification and denitrification experiment.Conditions of the experiment were optimized by using orthogonal design.For determination of diffusive properties of the carrier,an image analysis was applied,thus kinetics model was founded.It was revealed that the removal efficiency of NH4＋-N was the highest under the carrier conditions of 2.5% bacterial suspension concentration,1% of activated charcoal,32 ℃ ambient temperature,pH=8.0.Under such conditions,the removal efficiency could reach 88.35%.The internal diffusion in the experiment could be neglected.The reaction kinetics of immobilized bacteria could be expressed as Monod equation,kinetic parameter vmax= 2.47×10-3 mg·L-1·s-1,Km = 481.38 mg·L-1.

关 键 词：复合固定化 微生物脱氮 正交试验 动力学模型 

分 类 号：X703.1[环境科学与工程—环境工程]