Applied Mechanics and Materials Vols. 448-453

Abstract: A pilot-scale ultrafiltration (UF) experiment was conducted to determine the effect of membrane flux on pollutants removal performance and membrane fouling. The study results showed that with the increase of the membrane flux (20, 30 and 40 LMH respectively), the removal of turbidity, COD_Mn and UV₂₅₄ were slightly decreased. Every 10 LMH more flux increased, the UV₂₅₄ removal was reduced double. The growth rate of the trans-membrane pressure (TMP) became faster when the membrane flux increased, and 20 LMH could be considered as the critical flux in the raw water quality and working conditions. Membrane fouling rate could be delayed by air bubbling and backwashing. The larger the membrane flux was, the more TMP could be reduced. Furthermore, the effect of delaying the membrane fouling by backwashing was better than by air bubbling.

Abstract: EnergyTIC project has made available easy ICT ́s solutions for domestic end users in order to involve the social housing residents as an active part of water and energy efficiency. In this paper we analyze a proposal for a methodology designed to apply these single home ICT technologies in the whole-building energy layer. Our approach treat to take advantage of the the system currently in operation at single-dwelling level in order to involve users in the same building as clusters of the energy and water savings at building level. An on-line continuous benchmarking process between buildings in the same area will be used as the main tool of our procedure.

Abstract: Water device is the end of water supply system, its water saving performance of construction plays a key role in the water saving in building^[. We test the water-saving performance of various device by the "water saving performance testing device" which is developed independently by our group, analysis the flow characteristics at different conditions. It can apply view for consumers to choose qualified water-saving appliances in the future^[2].

Abstract: As a new type and high efficiency and low energy consumption one in biological denitrification and phosphorus removal technology, denitrifying phosphorus removal has become a hot topic in the research field of the water treatment technology. In this technology, denitrifying phosphate removal bacteria (DPBs) plays an important role. In each process stage of an A²/O process, denitrifying phosphorus removal bacteria (DPBs) plays different function. Combining with theory of the A²/O process, the function and main influence factors of denitrifying phosphorus removal bacteria (DPBs) are studied, and the prospect about DPBs is proposed.

Abstract: Water resources constraints of Chinas future sustainable development have been the most important strategic issue, so China's sustainable development strategy must be built on the basis of a clear strategy for water resources. Chinese government has begun to pay attention to the comprehensive management of water resources, especially to improve the efficiency of water use and the control of water pollution as an important and urgent task. Rivers flowing through cities are subject to serious water pollution, some even affect the drinking water which is directly related to the sustainable development of urban society and economy and people's quality of life. Urban water pollution has become an urgent problem, the Government is also aware of the urgency of water pollution, the need to develop a pollution control plan, but progress is not satisfactory.

Abstract: The source of small-scale rural hydropower in our country is numerous. The exploitation and construction of small-scale hydropower plays a vital part in the economy, environment and ecology in our rural area. Meanwhile, the experience which we have learnt has promoted the development of small-scale hydropower in the whole world. However, there still exist certain problems. This thesis has summed up those problems, and gives some legal regulations. In this way, the small-scale rural hydropower would make a big impact in our country.

Abstract: Fujian earth-buildings have much attention of the world for their protection since they have became the world heritage in 2008,and have do various building protection research, but the research of rammed-earth material strength nondestructive testing has not began. Through the research of working principle of the rebound hammer and rammed-earth material mechanical properties, increasing the end of the rod to improve the detection precision. Consult the method of building the testing strength curve for concrete to build testing strength curve of rammed-earth material, lays a foundation of field detection for the earth-building in service, contribute to improve protection measures.

Abstract: In engineering quality inspection and acceptance and evaluation of structural properties, the quality of structure real object is paid more and more attention to by all parties involved in construction. But the structural detection technology and corresponding rules are lagging. Through the use of the same batch of concrete structure and frost resistance of concrete test block test, the results show that for the same concrete mix, the frost resistance of standard preserved test block is better than that of the core samples drilled from concrete; as for the mixture ratio, the forming and curing conditions are exactly same as the concrete, and the preserved test block frost-resistance performance is also superior to that of concrete core-sample.

Abstract: This article takes an actual public building in Changchun City as an example to field test the heat transfer coefficient of fly ash autoclaved aerated concrete exterior wall. By analysis the field test value, theory calculation value, and the maximum value of the design standard for energy efficiency of public building (GB50189-2005), I concluded that fly ash autoclaved aerated concrete self-thermal insulation building envelope exterior wall fully meet the energy-saving standard requirements, which does not need additional insulation material. And further as heat transfer coefficient of wall test and energy saving standard maximum heat transfer coefficient as the main parameter, I used DeST-c software simulation to calculate the building energy consumption. The simulation results showed that the heating energy consumption of fly ash autoclaved aerated concrete self-thermal insulation building envelope is 16.32% lower than the standards required value, which has the advantage of energy saving property.

Abstract: Hybrid ventilation is a two-mode system, including mechanical and natural ventilation, which can be used in large space to exhaust excessive heat while minimize energy consumption. One mathematical model is developed to calculate indoor vertical temperature distribution by the hybrid ventilation. Here, the mathematical model is proposed to illustrate the running operation of the hybrid ventilation, especially the control strategies of the natural ventilation in this paper. An experimental and theoretical investigation of natural ventilation in the hybrid system in an atrium building has been conducted. A simplified approach for calculating critical outer temperature and a mathematical model of the natural ventilation in the hybrid system are both proposed in this paper. We have restricted our attention to the natural wind within the upper zone of the large space, in which the effects of the outer air temperature, indoor heat, the natural air rate, and the inlet location of the natural wind are discussed by the mathematical model and experimental data.