亚硝化细菌吸附-包埋固定化方法的优化及其脱氮性能  

THE OPTIMIZATION AND NITROGEN REMOVAL PERFORMANCE OF NITRIFICATION BACTERIA'S ADSORPTION AND EMBEDDING IMMOBILIZATION METHOD

作　　者：晋凯迪 于鲁冀[1,2] 陈慧敏[1] 李廷梅[2,3] 

机构地区：[1]郑州大学水利与环境学院,450001 [2]郑州大学环境技术咨询工程公司,450002 [3]掷州大学环境政策规划评价研究中心,河南郑州450002

出　　处：《水处理技术》2015年第7期57-60,64,共5页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07204-001-004)

摘　　要：选用活性炭作为吸附载体,聚乙烯醇(PVA)和海藻酸钠(SA)的混合物作为包埋载体,实验发现活性炭含量、包埋载体中PVA和SA的含量、交联时间对小球的固定化效果有重要影响。设计正交实验对这4个因素进行优化,得到优化固定化条件为:PVA、SA、AC的质量分数分别为8%、0.5%、1%,交联时间为12 h;在温度30℃、p H为7、振荡速度150 r/min、处理时间48 h的条件下,固定化小球对贾鲁河河水NH3-N的去除率达到96.78%,明显高于游离菌70.29%的NH3-N去除率,具有高效去除的特点。Activated carbon was selected as the adsorption carrier with the mixture of polyvinyl alcohol （PVA） and sodium alginate （SA） as the embedding medium. It was found that the concent of activated carbon, the content ofpolyvinyl alcohol （PVA） and sodium alginate （SA） and the cross-linking time had a significant influence on the efficiency of immobilized beads. The abovementioned four factors were optimized by orthogonal tests. The optimum imbedding condition was mass fraction ofpolyvinyl alcohol being 8%, sodium alginate being 0.5%, activated carbon being 1%, and cross-linking time 12 h. Under the conditions of the temperature being 30 ℃, pH being 7, oscillation speed being 150 r/min and the processing time being 48 h, taking the water in Jialuhe River as a sample, it was found that the ammonia nitrogen removal rate of the immobilized bacteria reached 96.78%, which was significantly higher than that of free bacteria （70.29%）, indicating its characteristic of high removal efficiency.

关 键 词：亚硝化细菌 正交实验 固定化 NH3-N 

分 类 号：X703.1[环境科学与工程—环境工程]