In this study,the activated sludge model implemented in the BioWin software was validated against full-scale wastewater treatment plant data. Only two stoichiometric parameters(Y p /acetic and the heterotrophic yield(...In this study,the activated sludge model implemented in the BioWin software was validated against full-scale wastewater treatment plant data. Only two stoichiometric parameters(Y p /acetic and the heterotrophic yield(Y H)) required calibration. The value 0.42 was used for Yp /acetic in this study,while the default value of the BioWin software is 0.49,making it comparable with the default values of the corresponding parameter(yield of phosphorus release to substrate uptake(YPO4)) used in ASM2,ASM2 d,and ASM3 P,respectively. Three scenarios were evaluated to improve the performance of the wastewater treatment plant,the possibility of wasting sludge from either the aeration tank or the secondary clarifier,the construction of a new oxidation ditch,and the construction of an equalization tank. The results suggest that construction of a new oxidation ditch or an equalization tank for the wastewater treatment plant is not necessary. However,sludge should be wasted from the aeration tank during wet weather to reduce the solids loading of the clarifiers and avoid effluent violations. Therefore,it is recommended that the design of wastewater treatment plants(WWTPs) should include flexibility to operate the plants in various modes. This is helpful in selection of the appropriate operating mode when necessary,resulting in substantial reductions in operating costs.展开更多
In the economic structure of our country, small and medium-sized enterprises （SMEs） are the most important part of the backbone, with the continuous popularization of the Internet, e-commerce has gradually become a ...In the economic structure of our country, small and medium-sized enterprises （SMEs） are the most important part of the backbone, with the continuous popularization of the Internet, e-commerce has gradually become a business model that the current small and medium enterprises must face and accept, The development of enterprises is of great signifi cance. In this context, the article first introduced the importance of the development of e-commerce SMEs, and then based on the actual operation of the community put forward and analyzed the current e-commerce development under the existing problems, and finally based on the actual lack of effective Development Strategy of E - commerce for Small and Medium - sized Enterprises.展开更多
This thesis is designed to propose a feasible moral education pattern forming in experience and idea against the current circumstance of preferring preaching rather than taking action, results than process in moral ed...This thesis is designed to propose a feasible moral education pattern forming in experience and idea against the current circumstance of preferring preaching rather than taking action, results than process in moral education according to the development status of morality and the law of somatopsychic development of individual. It aims to start the feeling system of educators, stimulate the in-depth emotional experience, guarantee the smooth transition from moral cognition to moral behavior, and cultivate and create the individual with virtue, healthy mind and body and good manners so as to improve the effectiveness of moral education.展开更多
基金Supported by the College of Scientific Innovation Significant Cultivation Fund Financing Projects(No.708047)the Key Special Program for Pollution Control(No.2012ZX07101-003)
文摘In this study,the activated sludge model implemented in the BioWin software was validated against full-scale wastewater treatment plant data. Only two stoichiometric parameters(Y p /acetic and the heterotrophic yield(Y H)) required calibration. The value 0.42 was used for Yp /acetic in this study,while the default value of the BioWin software is 0.49,making it comparable with the default values of the corresponding parameter(yield of phosphorus release to substrate uptake(YPO4)) used in ASM2,ASM2 d,and ASM3 P,respectively. Three scenarios were evaluated to improve the performance of the wastewater treatment plant,the possibility of wasting sludge from either the aeration tank or the secondary clarifier,the construction of a new oxidation ditch,and the construction of an equalization tank. The results suggest that construction of a new oxidation ditch or an equalization tank for the wastewater treatment plant is not necessary. However,sludge should be wasted from the aeration tank during wet weather to reduce the solids loading of the clarifiers and avoid effluent violations. Therefore,it is recommended that the design of wastewater treatment plants(WWTPs) should include flexibility to operate the plants in various modes. This is helpful in selection of the appropriate operating mode when necessary,resulting in substantial reductions in operating costs.
文摘In the economic structure of our country, small and medium-sized enterprises （SMEs） are the most important part of the backbone, with the continuous popularization of the Internet, e-commerce has gradually become a business model that the current small and medium enterprises must face and accept, The development of enterprises is of great signifi cance. In this context, the article first introduced the importance of the development of e-commerce SMEs, and then based on the actual operation of the community put forward and analyzed the current e-commerce development under the existing problems, and finally based on the actual lack of effective Development Strategy of E - commerce for Small and Medium - sized Enterprises.
文摘This thesis is designed to propose a feasible moral education pattern forming in experience and idea against the current circumstance of preferring preaching rather than taking action, results than process in moral education according to the development status of morality and the law of somatopsychic development of individual. It aims to start the feeling system of educators, stimulate the in-depth emotional experience, guarantee the smooth transition from moral cognition to moral behavior, and cultivate and create the individual with virtue, healthy mind and body and good manners so as to improve the effectiveness of moral education.
