The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The EMD method was introduced to study the fluctuation of production and consumption of energy in China at multi-time scale from 1949–2008. Through the method of EMD, the fluctuations or trends in the different time level were unbundled to produce a series of different characteristics of the intrinsic mode functions and the system had the evolution curves on a different time scale, which could be...
Persistent Organic Pollutants (POPs) mainly cause harm to the reproductive function of human being and animal kingdom, which is a serious threat to human and animal survival or reproduction. This paper blacklisted 70 kinds of POPs and outlined their character and pollution hazards. Therefore, China should strengthen basic research in POPs pollution, strengthen the environmental management and the...
Calcium magnesium acetate (CMA), an environmentally friendly deicing salt, was prepared from furfural wastewater. A production line of CMA (5t/day) was established according to laboratory study, and CMA was produced using the line. The results indicated that the designed preparation process can be applied to actual production, and acetic acid and water from furfural wastewater basically attain to...
Release of phosphorus(P) into effluent of activated sludge process was reported in the recent researches of sludge reduction induced by Tubifex. Decomposition of Tubifex residues is considered to be accompanied by the release of P. A series of experiments were undertaken to evaluate the influence of phosphorus which released from the Tubifex residues to the wastewater treatment system. In present...
The ecological socialism is an important 1socialism ideological trend and faction deriving from ecology movement in the west in 1970s. It contains many valuable thoughts,theories and viewpoints, which have the significant enlightenment function in constructing the socialist harmonious society at present. Constructing the socialist harmonious society should stick to the socialist road: should follow...
In order to sustain the safety and stability of underground working drifts under blast vibration, Blastmate III is employed to test blast vibration in Tongkeng Mine, Guangxi, China. Combined with Sadaovsk formula, the stability of underground drifts is evaluated using comprehensive coefficient method. The maximum explosive quantity of single blasting adaptable for different comprehensive coefficient...
This paper studied the effect of microbial species grow speed(MPGS), soluble microbial populations(SMPs) on the excess sludge production in the oxic-settling-anoxic process (OSA process), a modification of conventional activated sludge process by inserting a sludge holding tank in a sludge return line. The OSA process may provide a cost-effective way to reduce excess sludge production in activated...
The impact of temperature and precipitation to Nanjing manufacturing economy was analyzed by using TRANSLOG model. The results of model estimated by randge regression method show that the average boundary output elasticity of temperature and precipitation factor to the manufacturing undulation output value are −0.1813 and −0.0683 respectively, which means both of temperature and precipitation have...
This study reported the spatio-temporal variability of terrestrial net primary production (NPP) in the lower-middle reaches of Yangtze River from 2000 to 2006. The impact of climate change was also described. According to the analysis results, mean NPP of this region during 7 years was 535.8 gCm−2yr−1, which was higher than that of the nation during the same period. It was found that NPP showed great...
The objective of this study is to investigate the effect and mechanism of pretreating sewage slugde with microwave / alkali as a combined method, also the improvement of anaerobic digestionby of treated sludge was tested by biochemical methane potential (BMP) procedure. The results showed that synergistic effect was played between microwave irradiation and alkali. The SCOD of liquor reached 2684mg/L,...
As a effective pretreatment of excess sludge treatment, thermochemical hydrolysis method was not only good at cells disintegration, but also enhancing the treatment results of subsequent process. This experiment improving the traditional thermochemical method by separated the thermal process and the alkaline process. Examined SCOD value, SOCD remove rate of sludge and biogas production of anaerobic...
Estimation of gross primary production (GPP) from remote sensing data is an important approach to study regional or global carbon cycle. In this study, a satellite-driven model, vegetation photosynthesis model (VPM) was introduced to estimate gross primary production (GPP) of the semi-arid grassland ecosystem for the growing season (2006) in North China. Meanwhile, observed GPP derived from eddy covariance...
In order to realize the sustainable development and utilization of woody biomass energy resources in Henan province of China, the authors constructed a fitting evaluating system depending on the sustainable development theory and the regionally practical condition there. This system was constructed by three subsystems, six criterion layers and thirty two evaluated indexes belonging to these different...
Uncertainty exists in the planning program, so effective evaluation on and prevention from risk help to improve the guidance function of planning. This paper firstly classifies the risky factors into three major categories including exploration stage, development stage and the constrainted; as well as six subcategories including resources fulfillment, exploration pace, production building pace, production...
Fairing the steel plate by hot works is an important technics to improve the quality of the vessel. The mechanical performance of high-strength ship steel plate faired by hot works will influence the structural strength of the hull. In this paper, DH32 high-strength ship steel plate is taken as example to investigate the variation of the properties due to being heated by welding flame. Performance...
[Objective] This paper focuses on analyzing the energy resources and precipitation trends to the context of global warming in the western Liaoning Province in recent 60 years, where located in the northern hemisphere. Provide the basis study for the adjustment of agricultural structure and full use of energy resources. [Method] Use meteorological data of three cities in western Liaoning Province during...
Characteristics of production and risk, distribution of water environmental risk are analyzed comprehensively in Chemical Industry Park. The assessment method about inherent risk of water environment by hazardous substances is proposed. Scoring rules are designed from the physical and chemical properties, quantity, health hazard, environmental sensitivity, the risk of equipment and technology, and...
Recently, the study of nitrous oxide (N2O) and methane (CH4) emission in the process of treating domestic wastewater drived more and more people's attention.N2O is by-product of nitrification. Some studies showed that N2O emission influenced by temperature, pH value, DO, salinity and plant species. CH4 was produced in strictly anaerobic conditions through the reduction of CO2 by methane bacteria....
By comparative analysis of characteristc distribution, correlation, biological absorption coefficient and the characteristc element pairs of 13 trace elements in Litchi and soils from four production areas, Guangdong province, the results revealed that the characteristic elements of four production areas are Cu, Mg, Zn, Fe, Cr, and the characteristic element pairs are Cu-Li, Cu-Zn, Li-Mg, Li-V, Mg-V,...
Hebei is a major agricultural province, rich in agricultural resources, but can-known brands in the country are few. Based on the development of agricultural brand status, this paper analyzes the development of agricultural brand strengths and weaknesses, and proposes the creation of market demand-oriented agricultural brand, and promote production and management of large-scale development of countermeasures.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.