The aim of this work is to evaluate the feasibility of applying the technology of oxidation-reduction potential （ORP） control on the municipal wastewater treatment system for nitrogen and phosphorus removal. Meanwhi...The aim of this work is to evaluate the feasibility of applying the technology of oxidation-reduction potential （ORP） control on the municipal wastewater treatment system for nitrogen and phosphorus removal. Meanwhile the relation between the optimal ORP （ ORPopt ） and influent C/N ratio was evaluated, in which the influent chemical oxygen demand （ COD ） concentration was stabilized at （290 ± 10 ） mg/L, the influent total phosphorus （TP） concentration was stabilized at （7.0 ± 0.5 ） mg/L. The results indicated that： （1） the ORP in the second anoxic zone had effect on nitrogen and phosphorus removal capability, and the average percentages of phosphorus uptake in ANO2 zone （ ηa ） increased with increasing ORP, i. e. , increasing from 12. 0% at - 143 mV to 22.0%,30.0%,37.0%, and45.0% at -123, -111, -105 and -95 mV, respectively; （2） the ORPopt as function of influent C/N ratio could be calculated by the equation： y ffi 252. 73e〈 -x/3.39） _ 131.01 ; the maximum percentage of phosphorus uptake in ANO2 as function of the ORPopt could be calculated by the equation： y ffi -0.49e（x/15.58） ＋ 1. 51. The ORPopt was the important process control parameter that must be optimized for operation of enhanced biological phosphorus removal （ EBPR ） system. Moreover, ORP sensor is very simple, and the industrial applications of this strategy is practical.展开更多
Characteristic town has became an important carrier for urban-mral integration. Based on the multiple compounding of the charactemtic town planning, it is significant to combine tiie universal viewpoint widi tradit...Characteristic town has became an important carrier for urban-mral integration. Based on the multiple compounding of the charactemtic town planning, it is significant to combine tiie universal viewpoint widi traditional small town planning. This paper by combining with “universaT viewpoint introduced the transformation of traditional small town planning in theory and practice, and combed the planning stategies from the 4 a^ects of “all level”,“all space”, “all element^,and “all dimension”. Based on the master plan of Guzhu Town in Heyuan, specific strategies were put forward from the 6 dimensions of resoutce analysis, spatial layout, industtiai construction, traffic connection, ecological control and system update, to provide references for the planning of characteristic towns.展开更多
In a few years,with the progress of China's society,material needs and spiritual needs are in the corresponding enhancement.All needs and requirements of society for talents are in the unceasing increase and impro...In a few years,with the progress of China's society,material needs and spiritual needs are in the corresponding enhancement.All needs and requirements of society for talents are in the unceasing increase and improvement,and certainly will need to increase the country's national education.Our country put forward the strategy of developing the country through science and education,and the university education is the center of it.So our country on the one hand,through expanding enrollment rate,let more people to accept higher education;On the other hand,through increasing the investment of the infrastructure construction in colleges and universities,the campus can satisfy the need of more features.Along with the progress of market economy and urban modernization,the campus development level has become an important symbol in measuring the progress of a city,a regional economic and cultural development.It is also the origin to transport all kinds of advanced talents for urban.The construction of university campus is gradually developed in such an environment,striving to reflect new period,new era university campus's new look and new attitude.Trying to develop the campus to which has its own characteristic humanities landscape and put the characteristic of open and humanistic,functional and artistic quality,ecological and sustainable in organic combination of unity,advancing with The Times.展开更多
基金National Natural Science Foundation of China(NSFC)(No.50978118)
文摘The aim of this work is to evaluate the feasibility of applying the technology of oxidation-reduction potential （ORP） control on the municipal wastewater treatment system for nitrogen and phosphorus removal. Meanwhile the relation between the optimal ORP （ ORPopt ） and influent C/N ratio was evaluated, in which the influent chemical oxygen demand （ COD ） concentration was stabilized at （290 ± 10 ） mg/L, the influent total phosphorus （TP） concentration was stabilized at （7.0 ± 0.5 ） mg/L. The results indicated that： （1） the ORP in the second anoxic zone had effect on nitrogen and phosphorus removal capability, and the average percentages of phosphorus uptake in ANO2 zone （ ηa ） increased with increasing ORP, i. e. , increasing from 12. 0% at - 143 mV to 22.0%,30.0%,37.0%, and45.0% at -123, -111, -105 and -95 mV, respectively; （2） the ORPopt as function of influent C/N ratio could be calculated by the equation： y ffi 252. 73e〈 -x/3.39） _ 131.01 ; the maximum percentage of phosphorus uptake in ANO2 as function of the ORPopt could be calculated by the equation： y ffi -0.49e（x/15.58） ＋ 1. 51. The ORPopt was the important process control parameter that must be optimized for operation of enhanced biological phosphorus removal （ EBPR ） system. Moreover, ORP sensor is very simple, and the industrial applications of this strategy is practical.
文摘Characteristic town has became an important carrier for urban-mral integration. Based on the multiple compounding of the charactemtic town planning, it is significant to combine tiie universal viewpoint widi traditional small town planning. This paper by combining with “universaT viewpoint introduced the transformation of traditional small town planning in theory and practice, and combed the planning stategies from the 4 a^ects of “all level”,“all space”, “all element^,and “all dimension”. Based on the master plan of Guzhu Town in Heyuan, specific strategies were put forward from the 6 dimensions of resoutce analysis, spatial layout, industtiai construction, traffic connection, ecological control and system update, to provide references for the planning of characteristic towns.
文摘In a few years,with the progress of China's society,material needs and spiritual needs are in the corresponding enhancement.All needs and requirements of society for talents are in the unceasing increase and improvement,and certainly will need to increase the country's national education.Our country put forward the strategy of developing the country through science and education,and the university education is the center of it.So our country on the one hand,through expanding enrollment rate,let more people to accept higher education;On the other hand,through increasing the investment of the infrastructure construction in colleges and universities,the campus can satisfy the need of more features.Along with the progress of market economy and urban modernization,the campus development level has become an important symbol in measuring the progress of a city,a regional economic and cultural development.It is also the origin to transport all kinds of advanced talents for urban.The construction of university campus is gradually developed in such an environment,striving to reflect new period,new era university campus's new look and new attitude.Trying to develop the campus to which has its own characteristic humanities landscape and put the characteristic of open and humanistic,functional and artistic quality,ecological and sustainable in organic combination of unity,advancing with The Times.
