本研究对四种不同的聚4-甲基-1-戊烯(PMP)中空纤维膜进行气通量、泡点、拉伸强度等性能表征,其中M1、M2属于致密膜,M3、M4属于微孔膜,对四种膜进行了挂膜实验。选用了氧气通量最大、生物膜生长较快的M4中空纤维膜组件,分别研究了填充密...本研究对四种不同的聚4-甲基-1-戊烯(PMP)中空纤维膜进行气通量、泡点、拉伸强度等性能表征,其中M1、M2属于致密膜,M3、M4属于微孔膜,对四种膜进行了挂膜实验。选用了氧气通量最大、生物膜生长较快的M4中空纤维膜组件,分别研究了填充密度、曝气压力和水力停留时间对MABR处理性能的影响。研究结果表明,填充密度为100 m^(2)/m^(3)、曝气压力为40 kPa、HRT为10 h时,系统达到最佳处理效果,处理量分别为11 g COD/(m^(2)·d)和0.72 g NH_(4)^(+)-N/(m^(2)·d)。展开更多
Comparative ultrastructural investigations on twenty-three isolates of Tetraselmis from the South China Sea, East China Sea and Huanghai Sea, have revealed that these isolates belong to:(1)Tetraselmis chui Butcher; (2...Comparative ultrastructural investigations on twenty-three isolates of Tetraselmis from the South China Sea, East China Sea and Huanghai Sea, have revealed that these isolates belong to:(1)Tetraselmis chui Butcher; (2)T. cordiformis (H. J. Carter) Stein; (3)T. helgolandica Kylin; (4)T. suecica (Kylin) Butcher; (5)T. guangdongensis sp. nov. Except T. helgolandica, the others are new records in China. T. guangdongensis sp. nov. is a new species. Its external and anatomical features closely resemble those of T. impellucida McLachlan et Parke. As in that species the pyrenoid is penetrated from many directions by cytoplasmic channels delimited by a double membrane. The protoplast withdraws from the apical portion of the theca, that portion which overlaid the trough inverts and pops out in the form of a teat. But unlike that species a starch sheath is present; pyrenoid matrix is surrounded by thylakoids which intervenes between the matrix and the starch sheath surrounding pyrenoid; the theca is stratified.展开更多
文摘本研究对四种不同的聚4-甲基-1-戊烯(PMP)中空纤维膜进行气通量、泡点、拉伸强度等性能表征,其中M1、M2属于致密膜,M3、M4属于微孔膜,对四种膜进行了挂膜实验。选用了氧气通量最大、生物膜生长较快的M4中空纤维膜组件,分别研究了填充密度、曝气压力和水力停留时间对MABR处理性能的影响。研究结果表明,填充密度为100 m^(2)/m^(3)、曝气压力为40 kPa、HRT为10 h时,系统达到最佳处理效果,处理量分别为11 g COD/(m^(2)·d)和0.72 g NH_(4)^(+)-N/(m^(2)·d)。
文摘Comparative ultrastructural investigations on twenty-three isolates of Tetraselmis from the South China Sea, East China Sea and Huanghai Sea, have revealed that these isolates belong to:(1)Tetraselmis chui Butcher; (2)T. cordiformis (H. J. Carter) Stein; (3)T. helgolandica Kylin; (4)T. suecica (Kylin) Butcher; (5)T. guangdongensis sp. nov. Except T. helgolandica, the others are new records in China. T. guangdongensis sp. nov. is a new species. Its external and anatomical features closely resemble those of T. impellucida McLachlan et Parke. As in that species the pyrenoid is penetrated from many directions by cytoplasmic channels delimited by a double membrane. The protoplast withdraws from the apical portion of the theca, that portion which overlaid the trough inverts and pops out in the form of a teat. But unlike that species a starch sheath is present; pyrenoid matrix is surrounded by thylakoids which intervenes between the matrix and the starch sheath surrounding pyrenoid; the theca is stratified.
