For efficient energy consumption and control of effluent quality, the cycle duration for a sequencing batch reactor (SBR) needs to be adjusted by real-time control according to the characteristics and loading of waste...For efficient energy consumption and control of effluent quality, the cycle duration for a sequencing batch reactor (SBR) needs to be adjusted by real-time control according to the characteristics and loading of waste-water. In this study, an on-line information system for phosphorus removal processes was established. Based on the analysis for four systems with different ecological community structures and two operation modes, anaerobic-aerobic process and anaerobic-anaerobic process, the characteristic patterns of oxidation-reduction potential (ORP) and pH were related to phosphorous dynamics in the anaerobic, anoxic and aerobic phases, for determination of the end of phosphorous removal. In the operation mode of anaerobic-aerobic process, the pH profile in the anaerobic phase was used to estimate the relative amount of phosphorous accumulating organisms (PAOs) and glycogen accumulat-ing organisms (GAOs), which is beneficial to early detection of ecology community shifts. The on-line sensor val-ues of pH and ORP may be used as the parameters to adjust the duration for phosphorous removal and community shifts to cope with influent variations and maintain appropriate operation conditions.展开更多
This study is aimed at characterizing the organic matter preserved in the Triassic Lockatong formation deposited in the Newark Basin. On the basis of the TOC （Total Organic Carbon）, the Lockatong formation was depos...This study is aimed at characterizing the organic matter preserved in the Triassic Lockatong formation deposited in the Newark Basin. On the basis of the TOC （Total Organic Carbon）, the Lockatong formation was deposited in a reducing environment in the deep NW part of the basin, which is favorable to the accumulation of organic matter. However, the Lockatong formation of the SE border of the basin was deposited in oxic conditions that prevented the preservation of organic matter if there is any. The structuration of the basin into deep subsiding NW section due to the reactivation of the NE-SW striking faults and the development of anoxic conditions were favorable for the accumulation and preservation of the organic matter in the deep part of the basin.展开更多
基金Supported by the Project of Scientific Research Base and Scientific Innovation Platform of Beijing Municipal Education Com-mission (PXM2008_014204_050843)the National Natural Science Foundation of China (50808004)the DoctoralStartup Research Program of Beijing University of Technology
文摘For efficient energy consumption and control of effluent quality, the cycle duration for a sequencing batch reactor (SBR) needs to be adjusted by real-time control according to the characteristics and loading of waste-water. In this study, an on-line information system for phosphorus removal processes was established. Based on the analysis for four systems with different ecological community structures and two operation modes, anaerobic-aerobic process and anaerobic-anaerobic process, the characteristic patterns of oxidation-reduction potential (ORP) and pH were related to phosphorous dynamics in the anaerobic, anoxic and aerobic phases, for determination of the end of phosphorous removal. In the operation mode of anaerobic-aerobic process, the pH profile in the anaerobic phase was used to estimate the relative amount of phosphorous accumulating organisms (PAOs) and glycogen accumulat-ing organisms (GAOs), which is beneficial to early detection of ecology community shifts. The on-line sensor val-ues of pH and ORP may be used as the parameters to adjust the duration for phosphorous removal and community shifts to cope with influent variations and maintain appropriate operation conditions.
文摘This study is aimed at characterizing the organic matter preserved in the Triassic Lockatong formation deposited in the Newark Basin. On the basis of the TOC （Total Organic Carbon）, the Lockatong formation was deposited in a reducing environment in the deep NW part of the basin, which is favorable to the accumulation of organic matter. However, the Lockatong formation of the SE border of the basin was deposited in oxic conditions that prevented the preservation of organic matter if there is any. The structuration of the basin into deep subsiding NW section due to the reactivation of the NE-SW striking faults and the development of anoxic conditions were favorable for the accumulation and preservation of the organic matter in the deep part of the basin.
