【摘要】 采用聚乙烯醇（ＰＶＡ）－硼酸包埋固定化法，选用ＰＶＡ为包埋载体，粉末活性炭作为无机载体，包埋固定Ａ／Ｏ生物脱氮系统中的再经驯化过的硝化污泥，制成固定化硝化菌颗粒．以流化床作为生物反应器，采用ＳＢＲ运行方式对人工配制含氮废水进行处理试验．结果表明：固定化硝化菌寿命长达７个月以上；固定化硝化菌的呼吸活性由开始时的１０．３ｍｇ／（Ｌ·ｈ），最终达４２０ｍｇ／（Ｌ·ｈ）左右；ＮＨ４－Ｎ去除负荷为２４０ｍｇ／（Ｌ·ｈ）；当颗粒填充率为４％，进水ＮＨ４－Ｎ浓度为３５ｍｇ／Ｌ和６５ｍｇ／Ｌ，反应时间分别为５ｈ和９ｈ时，ＮＨ４－Ｎ去除率皆可达９９％以上；当进水ＣＯＤ浓度为２３０ｍｇ／Ｌ左右，ＮＨ４－Ｎ浓度为３５ｍｇ／Ｌ左右，反应时间为４ｈ，ＣＯＤ去除率在８６％左右，ＮＨ４－Ｎ去除率维持在９０％左右．用扫描电子显微镜对固定化硝化菌菌群的生长及分布情况进行了观察．更多还原

【Abstract】 The immobilized microbes pellets were made from entrapping cultivated nitrifying activated sludge using polyvinyl alcohol(PVA)crosslinked with boric acid,PVA is entrapment carrier and powdered activated carbon is inorganic carrier.The source of nitrifying activated sludge come from A/O system.In biological fluidized bed reactor(BFBR),Sequencing Batch Reactors (SBR) system treating composed NH 4 N wastewater was carried out.The experiment results were as follows:the immobilized nitrobacteria’s life was more than seven months;the oxygen using rate(OUR)recovered from 10 3mg/(L·h) to 420mg/(L·h);the NH 4 N removal loading could reach 240 mg/(L·h).While the immobilized nitrobacteria pellets package percentage was 4%,influent NH 4 N concentration was 35 mg/L,reaction time was 5h,the NH 4 N removal efficiency reach 99%;influent NH 4 N concentration was about 65 mg/L,reaction time was 9h,the NH 4 N removal efficiency also reach 99%.When the influent COD is about 230 mg/L,NH 4 N is about 35mg/L,reaction time was 4h,the COD removal efficiency could reach 80%,the NH 4 N removal efficiency always kept 90% or so.In this research,the situation of microbe growth and distribution of immobilized nitrobacteria was observed with scanning electron microscope.更多还原