Advanced Materials Research Vols. 1010-1012

Abstract: The moat is one environmental part on the landscape of the historical and cultural tourism in Jing Zhou City. This paper Jing Zhou city moat Kowloon Yuan area for water pollution investigation. In view of the Jing Zhou Kowloon Yuan area moat water pollution, This paper has made an investigation about this, Through the analysis of experiment on the total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH₃-N) by single factor evaluation method. We have made a comprehensive analysis of the moat water environment and the pollution of its environment factors, Finally, We found that the water pollution and the the external behavior of the moat is due to the change of city life sewage and the lack of sewage treatment, On the basis of which, the corresponding counter measures are put forward.

Abstract: In this paper, a computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established to numerically study the NOx emission characteristics under different ratios of over fire air (OFA) and modes of in-service burner layers. The current CFD model had adopted a chemical percolation devolatilization (CPD) model and been validated by comparing the simulated results with the experimental data. The numerical simulation results show that, with increasing the ratio of OFA, the carbon content in fly-ash increase somewhat linearly and the NOx emission reduce significantly, and the OFA ratio of 30% is optimal with higher burnout of pulverized coal and lower NOx emission. The different in-service burner layer modes have different influences on the residence time of the pulverized-coal particles, effect of air staging in the burner region and flue gas temperature at the exit of the lower furnace. Stopping the upper burner layers can increases the residence time of the pulverized-coal particles, resulting in the reduction of the carbon content in the fly ash and the increase of the pulverized-coal burnout. The flue gas temperature at the exit of the lower furnace can also decrease, which would be helpful to reducing the slagging tendency on the surfaces of the platen superheaters.

Abstract: Agricultural non-point source pollution has become the resources problems, because of its direct linkage with regional food security and ecological safety. In this article, Research Paradigm of agricultural non point source pollution was introduced, including the agricultural non point source pollution theory, research methods, management tools and research methods. These studies are beneficial to the further study of agricultural non point source pollution.

Abstract: In this paper, we mainly introduced demonstration project of flue gas desulfurization and denitrification achieved by ozone oxidation and alkali wastewater. The System showed high automatization, which performed good adaptability and load tracking capacity on the concentration of SO₂, NO_X and variation of flue gas. Meanwhile, outlet concentration of the SO₂ and NO_X could meet the design requirements. The experimental results showed that the overall economy of designed process had certain advantages compared with conventional desulfurization and denitrification technologies.

Abstract: Acid Red B dye wastewater was collaborative degradated by ozone and hydrogen peroxide. Various reaction conditions are studied which affect on decoloration rates of wastewater. The decoloration rate of Wastewater increases with O₃ gas flow rate increasing, and also increases with pH value increasing. O₃/H₂O₂ collaborative effects are better than O₃ alone, and the decoloration rate is higher with more H₂O₂ addition. Ozone Oxidation have a good effect to degrade Acid Red B dye wastewater, the decoloration rate can reach 98% with inflating O₃ 30min. H₂O₂ synergy can greatly increase the reaction rate, shorten the reaction time, improve the utilization of ozone.

Abstract: The feasibility of using oyster shell powder for the removal of Cu2+ from aqueous solutions was investigated employing an adsorption technique. Oyster shell powder with different size was prepared. Its adsorption property to copper ions was studied. It was found that in an aqueous medium of pH 7.0, the adsorptive capacity of copper ions increased gradually with the increase of adsorption time, the addition amount of oyster shell powder and decrease of particle size. Compared with other treatment methods, this method has advantages of simple process, low cost, good treatment effect, it has a good application prospect.

Abstract: The deactivation and regeneration of SCR catalyst have caught attention in the coal-fired power plant. Sulfur poisoning was one reason of the SCR catalyst deactivation. The V₂O₅/TiO₂ catalyst was prepared by sol-gel method. The SO₂ poisoning of V₂O₅/TiO₂ catalyst was investigated. The catalytic activity by thermal regeneration and thermal reduction methods were compared. The results showed that thermal regeneration or thermal reduction could recover the catalytic activity effectively. The best effect was obtained with the thermal reduction by 5% NH₃ concentration.

Abstract: This paper is based on the study of typical strategy of water bloom governance in China and introduces information retrieval method in water bloom governance. It can both ensure accuracy of the search and improve the search speed to combine decision tree and CPN neural network as retrieval mechanism. Finally it can be proved that the information retrieval mechanism is effective in governance decision of water bloom after using the Beihai in Beijing as the example.

Abstract: With the development of electrolytic aluminum in our country, sulphur content in aluminum anode increased year by year, thus there is the risk of SO₂ discharge over standard in exhaust gas treatment in electrolytic aluminum industry. Further, the waste heat from exhaust gas of electrolytic aluminum has not been made full use at present. It is necessary to development new exhaust gas treatment and utilization technology. In this study, a scheme about electrolytic aluminum exhaust gas cascade utilization has been proposed according to the characteristics of electrolytic aluminum exhaust gas. The electrolytic aluminum exhaust gas after dry treatment could be sent to power plant boiler as combustion air, as the discharge of electrolytic aluminum exhaust gas and air pollutants could be decreased greatly. After the comparison of techno-economic analysis, the discharge by the scheme of cascade utilization was less than that with desulfurization, with more economic benefit. Thus it is worth to be extended, since the scheme of electrolytic aluminum exhaust gas cascade utilization showed good techno-economy.

Abstract: The performance of biotrickling filter (BTF) inoculated Microbactrium oxydans DDH-1 removing tetrahydrofuran (THF) was investigated. The biotrickling filter exhibited good performance with short start-up of 3 days and easily recovery from the fluctuations. During stable THF loading at concentrations of 520 mg·m^-3 or lower and EBRT of 31, 24 and 18 s, the reactor exhibited high removal efficiencies up to 99%. The mass ratio of carbon dioxide produced to the THF removed was 2.01, which confirmed complete degradation of THF.