Microbial flocculant( MBF) is a kind of novel flocculant,which is widely used for the food industry,highly concentrated organic waste water treatment and the urban water supply technology. Due to its characteristics o...Microbial flocculant( MBF) is a kind of novel flocculant,which is widely used for the food industry,highly concentrated organic waste water treatment and the urban water supply technology. Due to its characteristics of superior flocculation effect,without secondary pollution to the environment and being easily degraded,MBF has been emerging as a hotspot of water treatment research in recent years. In this paper,the latest progress of the preparation of MBFs and the flocculating mechanism were presented. The practical application research of MBFs for water treatment was reviewed. Finally,suggestions and development prospect of research on MBFs were discussed.展开更多
Based on combined Cloud Sat/CALIPSO detections, the seasonal occurrence of deep convective clouds(DCCs) over the midlatitude North Pacific(NP) and cyclonic activity in winter were compared. In winter, DCCs are more fr...Based on combined Cloud Sat/CALIPSO detections, the seasonal occurrence of deep convective clouds(DCCs) over the midlatitude North Pacific(NP) and cyclonic activity in winter were compared. In winter, DCCs are more frequent over the central NP, from approximately 30°N to 45°N, than over other regions. The high frequencies are roughly equal to those occurring in this region in summer. Most of these DCCs have cloud tops above a 12 km altitude, and the highest top is approximately 15 km. These wintertime marine DCCs commonly occur during surface circulation conditions of low pressure, high temperature, strong meridional wind, and high relative humidity. Further, the maximum probability of DCCs,according to the high correlation coefficient, was found in the region 10°–20° east and 5°–10° south of the center of the cyclones. The potential relationship between DCCs and cyclones regarding their relative locations and circulation conditions was also identified by a case study. Deep clouds were generated in the warm conveyor belt by strong updrafts from baroclinic flows. The updrafts intensified when latent heat was released during the adjustment of the cyclone circulation current. This indicates that the dynamics of cyclones are the primary energy source for DCCs over the NP in winter.展开更多
文摘Microbial flocculant( MBF) is a kind of novel flocculant,which is widely used for the food industry,highly concentrated organic waste water treatment and the urban water supply technology. Due to its characteristics of superior flocculation effect,without secondary pollution to the environment and being easily degraded,MBF has been emerging as a hotspot of water treatment research in recent years. In this paper,the latest progress of the preparation of MBFs and the flocculating mechanism were presented. The practical application research of MBFs for water treatment was reviewed. Finally,suggestions and development prospect of research on MBFs were discussed.
基金funded by the National Natural Science Foundation of China (Grant Nos. 41105031, 41230419, 91337213 and 41205126)the China Special Fund for Meteorological Research in the Public Interest (Grant Nos. GYHY201306017 and GYHY201306077)+2 种基金the Strategic Priority Research Program (Grant No. XDA05100303)the Major State Basic Research Development Program (Grant No. 2010CB428601)Environmental Public Welfare Scientific Research (Grant No. 201209006)
文摘Based on combined Cloud Sat/CALIPSO detections, the seasonal occurrence of deep convective clouds(DCCs) over the midlatitude North Pacific(NP) and cyclonic activity in winter were compared. In winter, DCCs are more frequent over the central NP, from approximately 30°N to 45°N, than over other regions. The high frequencies are roughly equal to those occurring in this region in summer. Most of these DCCs have cloud tops above a 12 km altitude, and the highest top is approximately 15 km. These wintertime marine DCCs commonly occur during surface circulation conditions of low pressure, high temperature, strong meridional wind, and high relative humidity. Further, the maximum probability of DCCs,according to the high correlation coefficient, was found in the region 10°–20° east and 5°–10° south of the center of the cyclones. The potential relationship between DCCs and cyclones regarding their relative locations and circulation conditions was also identified by a case study. Deep clouds were generated in the warm conveyor belt by strong updrafts from baroclinic flows. The updrafts intensified when latent heat was released during the adjustment of the cyclone circulation current. This indicates that the dynamics of cyclones are the primary energy source for DCCs over the NP in winter.
