Some noticeable effects of process conditions, such as coagulation bath, solvent extraction, drying shrinkage and ultra-drawing, on the structure and properties of gel-spun PVA fibers are studied and discussed. High s...Some noticeable effects of process conditions, such as coagulation bath, solvent extraction, drying shrinkage and ultra-drawing, on the structure and properties of gel-spun PVA fibers are studied and discussed. High strength and high modulus PVA fibers with tensile strength of 11.3 cN / dtex and initial modulus of 430 cN / dtex have been obtained.展开更多
文章以粒径为5 mm的聚乙烯醇(PVA)凝胶颗粒为生物载体,研究其对厌氧污泥颗粒化进程及反应器运行效果的影响。在PVA颗粒污泥初成体形成的情况下,UASB反应器连续运行74 d。试验结果表明:经过32 d的培养,得到沉降性能优良的PVA颗粒污泥,反...文章以粒径为5 mm的聚乙烯醇(PVA)凝胶颗粒为生物载体,研究其对厌氧污泥颗粒化进程及反应器运行效果的影响。在PVA颗粒污泥初成体形成的情况下,UASB反应器连续运行74 d。试验结果表明:经过32 d的培养,得到沉降性能优良的PVA颗粒污泥,反应器COD去除率高达97%,容积负荷由1.05 kg COD·m-3d-1提升至13.33 kg COD·m-3d-1,水力停留时间由35 h缩短至8 h;运行结束时,COD去除率稳定在90%左右,容积负荷达到13.54 kg COD·m-3d-1。通过扫描电镜观察到成熟PVA颗粒污泥外表面丝状菌上交联生长着杆菌、球菌,内部主要附着丝状菌。展开更多
文摘Some noticeable effects of process conditions, such as coagulation bath, solvent extraction, drying shrinkage and ultra-drawing, on the structure and properties of gel-spun PVA fibers are studied and discussed. High strength and high modulus PVA fibers with tensile strength of 11.3 cN / dtex and initial modulus of 430 cN / dtex have been obtained.
文摘文章以粒径为5 mm的聚乙烯醇(PVA)凝胶颗粒为生物载体,研究其对厌氧污泥颗粒化进程及反应器运行效果的影响。在PVA颗粒污泥初成体形成的情况下,UASB反应器连续运行74 d。试验结果表明:经过32 d的培养,得到沉降性能优良的PVA颗粒污泥,反应器COD去除率高达97%,容积负荷由1.05 kg COD·m-3d-1提升至13.33 kg COD·m-3d-1,水力停留时间由35 h缩短至8 h;运行结束时,COD去除率稳定在90%左右,容积负荷达到13.54 kg COD·m-3d-1。通过扫描电镜观察到成熟PVA颗粒污泥外表面丝状菌上交联生长着杆菌、球菌,内部主要附着丝状菌。
