Applied Mechanics and Materials Vol. 733

Abstract: Recently, energy saving and emission reduction get more attention in the world, electric power industry is one of the major sectors of energy consumption. The national government has issued a series of related policies and regulations to change the power structure and control pollutant emissions, in order to improve the level of energy conservation and emission reduction. Some problems exist in the current policies and regulations. This paper puts forward measures and suggestions to strengthen energy conservation and emission reduction.

Abstract: Developing Low-carbon building is the essential measure for our society transfers to low carbon economic society. Therefore, we need chose appropriate policy evaluation tool that can help authorities to make suitable construction policy. The carbon emission in whole life cycle theory is a efficient tool to evaluate the value of Low-carbon building.

Abstract: In view of lack of systemic analysis on the optimization of water utilization structure and water allocation, the paper construct three-step allocation model of water utilization based on synergy theory. In the first step, identifying optimal allocation of domestic water, industrial water, agricultural water, ecological and environmental water with the synergy among the different purposes. In the second step, giving reasonable weight of different types of water using unit with the synergy among the different subjects. In the third step, allocating different demand of water using units in different months with the synergy among the different time. Finally, take the allocation of water in Y city in 2015 for example, we give the analog allocations of the model.

Abstract: Based on 3S Technology, this paper mainly focuses on studying temporal dynamic changes of landscape pattern in the upper reaches of the Madushan of Yunnan Province before and after the construction of Madushan hydropower station. From 2006 to 2011, the woodland area showed a downward trend, while those of some savanna, cropland, bench land, residential land, transportation land and industrial land were in adverse circumstances. The woodland area dropped from 1374.37km 2 to 1230.88 km2 by 10.4% compared to 2006. The water area increased from 6.99 km2 in 2006 to 11.72 km2 in 2011. What's more, some inter-transitions between different landscape types were also frequent, especially for woodland, cropland and savanna. Actually, the integrated variation of landscape degree was 6.2%. And all the landscape types presented a growing trend except for woodland. The fastest trend was 26.3% in industrial land, the slowest trend was 0.4% in cropland. In conclusion, there was an apparent change in the landscape pattern for the study area before and after the hydropower station construction, and this study could be significant for better understanding of the landscape ecological effects of hydropower exploitation.

Abstract: Desalination of seawater accounts for a worldwide water production. Despite the many benefits the technology has to offer, concerns rise over potential negative impacts on the environment. We studied the effect of brine on scapharca subcrenata exposed to brine discharge from desalination plant. The results show that individuals grew best at temperature from 18°C to 20°C. When the temperature exceeded 20°C, the survival rate of the individuals decreased significantly. Therefore, it is necessary to develop effective means of reducing the negative influence of brine discharged on the marine environment. The knowledge of scapharca subcrenata limits can help not only to locate desalination plants but to design disposal devices.

Abstract: Low-carbon mode is an inevitable choice for the sake of the necessity to achieve the social economic sustainable development. Specifically, it is also for the culture industry. The article is about a design of carbon dioxide capturing system for liquor cultural industry to help such culture industry of liquor to implement low-carbon mode. The system should accomplish some objectives such as carbon capture, low cast of operation and manufacturing, safety, ease of use and operation, and durability. The design is about using algae to capture the CO₂. Furthermore, the article introduces the preliminary design concept. Finally, the primary design concept is to capture CO₂ by taking advantage of photosynthesis to absorb any excess CO₂ that comes from production process.

Abstract: By aerobic composting bin type of sewage treatment plant sludge composting, through periodic sampling, research composting process temperature, moisture content, PH value changes and study the changes in compost maturity parameters of the DH. The results show that the compost temperature increased rapidly in the early rise in the first two days when fast to 50 degrees Celsius, in the tenth day decreased to room temperature; moisture content than the original sludge reduced by 40 percent to compost indicators; PH by reaction initial 6.2, and gradually becomes neutral and alkaline 7.8 biased. Experiments show that after aerobic sludge composting in temperature, moisture content, PH value terms have been reached sludge disposal requirements.

Abstract: In this paper, commonly used methods of sludge treatment and disposal, their advantages and disadvantages were introduced. Due to the requirements of sustainable development and circular economy, the sludge disposal technology would turn to development of harmless, reduction and resources. The study on sludge disposal of high-end technology would meet the future higher environmental demand.

Abstract: This article studied effluent water quality and membrane fouling by adding different concentration of polyaluminium chloride (PAC) into the submerged membrane bioreactor (MBR) in different dosing ways, and examined the effects on coagulation by adding Ca²⁺. Experiment results show that dosing ways of PAC have no significant influence on CODCr and NH3-N. When the concentration of PAC was 45mg/L and the continuous dosing way was chosen, the average concentration of pollutant was lowest, total phosphorus (TP) removal efficiency was highest, and the membrane fouling was effectively slowed. When the Ca²⁺ concentration was 20mg/L, the coagulation effect was the best, water quality was stable, and the membrane fouling was largely reduced.

Abstract: Combustion adjustment tests about air distribution modes were performed on 1 025 t/h boiler for NO_x emission controlling. NO_x emission was affected by factors such as oxygen content, upper tertiary air, over fire air and secondary air distribution modes. Fuel-NO_x raised drastically with the increase of oxygen content. NO_x concentration declined with the rise of upper tertiary air ratio. Both average flame temperature and NO_x emission concentration decreased inversely with over fire air. Beam waist mode had the lowest NO_x emission concentration among different air distribution modes. It emitted less 14.2% NO_x than that of balanced air distribution mode. NOx concentration can be reduced 10%-20% by combustion adjustment.