采用分子生物学手段,通过构建16 S rRNA基因文库,对新型剩余污泥减量化处理技术——生物砾间接触氧化反应器(GCOR)中悬浮颗粒的原核生物多样性进行了系统发育分析,并讨论了多种原核生物共存对剩余污泥减量化的贡献．结果表明,颗粒的原...采用分子生物学手段,通过构建16 S rRNA基因文库,对新型剩余污泥减量化处理技术——生物砾间接触氧化反应器(GCOR)中悬浮颗粒的原核生物多样性进行了系统发育分析,并讨论了多种原核生物共存对剩余污泥减量化的贡献．结果表明,颗粒的原核生物可分为好氧呼吸菌群与厌氧水解发酵菌群两大类．其中,优势菌群分别是以呼吸代谢为主的假单胞菌属和以发酵为主要代谢方式的拟杆菌/噬纤维菌菌属,它们的16S rRNA序列各占文库的17%．此外,好氧菌群中还发育有α蛋白菌、β蛋白菌、γ蛋白菌、亚硝化螺菌属、土壤杆菌属、衣原体属、葡萄糖杆菌属及褐色高温单孢菌属细菌；厌氧菌群中则发育属于螺旋体属、δ蛋白菌、反硝化菌、乳杆菌属、真杆菌属的原核生物．反应系统中两大相反环境多种原核生物的共存,为在降解污水有机物的同时,达到剩余污泥减量化做出巨大贡献．展开更多
In this work,p-type Co3O4 decorated n-type ZnO(Co3O4/ZnO)nanocomposite was designed with the assistance of bacterial cellulose template.Phase composition,morphology and element distribution were investigated by XRD,SE...In this work,p-type Co3O4 decorated n-type ZnO(Co3O4/ZnO)nanocomposite was designed with the assistance of bacterial cellulose template.Phase composition,morphology and element distribution were investigated by XRD,SEM,HRTEM,EDS mapping and XPS.Volatile organic compounds(VOCs)sensing measurements indicated a noticeable improvement of response and decrease of working temperature for Co3O4/ZnO sensor,in comparison with pure ZnO,i.e.,the response towards 100 ppm acetone was 63.7(at a low working temperature of 180℃),which was 26 times higher than pure ZnO(response of 2.3 at 240℃).Excellent VOCs response characteristics could be ascribed to increased surface oxygen vacancy concentration(revealed by defect characterizations),catalytic activity of Co3O4 and the special p-n heterojunction structure,and bacterial cellulose provides a facile template for designing diverse functional heterojunctions for VOCs detection and other applications.展开更多
文摘采用分子生物学手段,通过构建16 S rRNA基因文库,对新型剩余污泥减量化处理技术——生物砾间接触氧化反应器(GCOR)中悬浮颗粒的原核生物多样性进行了系统发育分析,并讨论了多种原核生物共存对剩余污泥减量化的贡献．结果表明,颗粒的原核生物可分为好氧呼吸菌群与厌氧水解发酵菌群两大类．其中,优势菌群分别是以呼吸代谢为主的假单胞菌属和以发酵为主要代谢方式的拟杆菌/噬纤维菌菌属,它们的16S rRNA序列各占文库的17%．此外,好氧菌群中还发育有α蛋白菌、β蛋白菌、γ蛋白菌、亚硝化螺菌属、土壤杆菌属、衣原体属、葡萄糖杆菌属及褐色高温单孢菌属细菌；厌氧菌群中则发育属于螺旋体属、δ蛋白菌、反硝化菌、乳杆菌属、真杆菌属的原核生物．反应系统中两大相反环境多种原核生物的共存,为在降解污水有机物的同时,达到剩余污泥减量化做出巨大贡献．
文摘In this work,p-type Co3O4 decorated n-type ZnO(Co3O4/ZnO)nanocomposite was designed with the assistance of bacterial cellulose template.Phase composition,morphology and element distribution were investigated by XRD,SEM,HRTEM,EDS mapping and XPS.Volatile organic compounds(VOCs)sensing measurements indicated a noticeable improvement of response and decrease of working temperature for Co3O4/ZnO sensor,in comparison with pure ZnO,i.e.,the response towards 100 ppm acetone was 63.7(at a low working temperature of 180℃),which was 26 times higher than pure ZnO(response of 2.3 at 240℃).Excellent VOCs response characteristics could be ascribed to increased surface oxygen vacancy concentration(revealed by defect characterizations),catalytic activity of Co3O4 and the special p-n heterojunction structure,and bacterial cellulose provides a facile template for designing diverse functional heterojunctions for VOCs detection and other applications.
