Advanced Materials Research Vols. 1030-1032

Abstract: The rapid growth of rural industry has resulted in increased financial well-being, with improvement of farmers’ salaries and development of urbanization. However, it has also contributed to decreased environmental quality and heavy consumption of resources, which were seriously threatening the sustainable economic and social development of China. Little, if any, related research has been published and few of these articles approach the topic from a rural perspective. Systematic evaluation system is lack of study. This paper tries to establish environmental effects assessment model for the ecological footprint of rural industry based on traditional footprint theory, then takes Jimo of Shandong Province and Zhuji of Zhejiang Province for instance to analyze environmental effects of rural industry. The results shows that the resources environmental effects of both regions are different and the ecological footprint per capita of both regions had increased from 2000 to 2009. The upward trend of Zhuji is more obvious and the industrial footprint per capita of Jimo is lower than Zhuji with the gap increasing in the decades. The treatment efficiency of industrial waste of Jimo is higher than that of Zhuji. The population of both regions are close, but the gap of industrial ecological footprint between them are expanding. The GDP ecological footprint of Zhuji was higher than that of Jimo, which means the rural industry of Zhuji put more pressure on the environment.

Abstract: The water quality assessment of Lam Takong River and tributaries, from 20 stations, 6 times (October and December, 2008; February, April, June and August, 2009), revealed that overall water quality was in class 3 of Thailand surface water standard, except NH₃-N, P and BOD. The maximum of NH₃-N (12.6 mg/L), Phosphate 2.7 mg/L and BOD (8.7 mg/L) were found at Quartermaster Department Royal Thai Army Bridge, Nakhon Ratchasima Municipality pump in Lam Takong reservoir and Ban Ta Krasang, respectively, causing class 4 surface water standard in these areas. Moreover, trophic level of Lam Ta Khong River was mesotrophic; except they were meso-eutrophic after passing through Nakhon Ratchasima Municipality, Ban Ta Krasung, and Kan Pom dam before reaching Mool River. The season also affected on water quality. The value of pH, DO, BOD and NH₃-N were significantly higher in dry season (p<0.01), while temperature, salinity and TSS were significantly lower in dry season (p<0.01). However, turbidity, TOC, NO₃, NO₂ and Chlorophyll-a in rainy season were higher than dry season but not statistically different. Pearson’s Correlation of 9 land use types on water quality showed that urban area was correlated with BOD, DO, NH₃-N, PO₄ and Chlorophyll-a (0.425, 0.380, -0.259, 0.445, and 0.339, respectively) higher than industrial area, scrub forest and water body. However, nitrate was mostly correlated with water body. Later, statistical models were developed from these results. WAPS was used to predict water quality in Lam Takong River. Three scenarios (present, 10 years, and 10 years with 25% BOD reduction) were simulated. The model predicts that water quality still decreases when flow through Nakhon Ratchasima Municipality. The minimum DO would reach 1 mg/L in ten years. However, if 25% BOD are reduced by future wastewater treatment plant and septic tank construction, the minimum DO would be 2.75 mg/L.

Abstract: The purpose of this paper is to study the impact of furnace temperature and load after blending in lignite, based on CFD software FLUENT-6.3,this paper choose the appropriate geometry model and the physical and mathematical models, and numerical simulation of the different conditions 600MW supercritical once-through boiler blending lignite furnace combustion process is curried out. And through a 600MW supercritical coal-fired boiler furnace lignite blended performed sections thermodynamic calculation under different conditions, worked out the furnace flue gas temperature, CO, CO2concentration distribute trend and radiant heat each section surface heat load conditions. The specific amount were blended with 5%, 10%, 15%, 20% were not dried lignite and dried lignite 20% after five conditions. And obtained a conclusion is the temperature and radiation heating surface flue gas heat load in the overall trend under the various conditions.

Abstract: Briefly introduced ANSYS software in this paper,especially its powerful function as a kind of finite element analysis software in terms of thermal analysis. Describes the basic principle of ANSYS thermal analysis、analysis steps and method of data pretreatment and post-treatment, discussed the application of ansys and problems needing attention. in thermal analysis

Abstract: This paper employed the water quality monitoring data of Nanfei River to analyze the water pollution status, and to contrast the water quality change of the river section which has been dredged. We selected TN, TP, COD and NH₃-N as the evaluation factors to study the spatial distribution. Results showed that TN concentration was seriously higher than the upper limit of surface water standard class V, and TP and COD values were in class V, and NH₃-N concentration was in class III. Refer to previous water quality monitoring data, dredging projects of Nanfei River worked significantly on TP, COD and NH₃-N removal, while TN concentration was 5 times more than before.

Abstract: The risk of natural gas long-distance pipeline and main factors of accidents are analyzed in this paper. According the consequences from above, quantitative risk assessment of long-distance pipelines under specific accident scenarios are completed with the help of numerical simulation model on long-distance pipeline leakage and dispersion. What’s more, on the basis of the assessment results, the necessary conditions for long-distance pipeline safe operation are presented. Finally, conclusions and safe operations under necessary conditions given in this paper are helpful for regular operation of pipeline, accident prevention, emergency response and reasonable supervision.

Abstract: The purpose of this study is to assess patterns of extreme rainfall and this study focused on the changes between two phases for extreme rainfall, for the period of 1971 to 2011 and from 1995 to 2011 in Kuala Lumpur and Selangor. The generalised extreme value distribution appears to outperform other distribution functions such as two-parameter Gumbel and lognormal and the three-parameter generalized extreme value (GEV), lognormal (LN3) and log Pearson (LP3) in modeling the one-hour annual maximum rainfall series from 14 stations. The estimated return period of 20, 50, 100-year for each stations based on the best fitting model for the periods of entire record data and from 1995-2011 have been computed. More than 70% of estimated quantiles using rainfall data from 1995-2011 are higher compared to estimation using the entire recorded data.

Abstract: As China's major grain producing areas of Jiangxi Province, in recent years, food production has stabilized at about 400 billion pounds since 2004 to maintain grain quality in the redeployment of more than 100 billion kilograms. Team depth of grain production counties in Jiangxi Province (district), the organization of agricultural cooperatives, agricultural enterprises, grain cooperatives, grassroots cadres and ordinary FAO held a forum to listen to the opinions and suggestions, and to gain first-hand information on the household survey. Through research benefiting the agriculture policy Jiangxi grain cooperatives affect the costs and benefits to help pinpoint stabilize grain production, increase grain production capacity to ensure food security direction.

Abstract: Field study was conducted to determine the optimum irrigation quantity and times of corn in 2010. Different irrigation treatments were set according to local farmers’ practices. Irrigation amounts of T1, T2, T3, T4, T5 and T6 were 225, 270, 337.5, 300, 360 and 450 mm, respectively. Irrigation times of T1, T2 and T3 were 3, and T4, T5 and T6 were 4. The results showed that soil salt decreased with the increasing of irrigation water amounts. The corn yield varied from 6560 to 8060 kg/ha². The highest yield was obtained from T5. Aiming to get high corn yield, total water supply of corn crops was 865 mm. Irrigation water productivity (Wpi) was the highest (2.92 kg/m³) with T1, and the lowest (1.74 kg/m³) with T6.

Abstract: Life cycle assessment (LCA) of Pacific white shrimp (Penaeus vannamei) was conducted in Trang province, southern Thailand during January, 2011 to December, 2012 to investigate the rate of carbon massflow in shrimp farming. Total 106 shrimp farm owners were interviewed and questionnaired. Carbon content, carbon fixation and carbon emission were also analyzed. The results revealed that the rate of carbon massflow from shrimp feed (C-input) was 0.015±0.031, carbon fixation in shrimp was 0.014±0.031, the carbon emission from shrimp was 0.001±0.000 and energy usage was 22.676±16.891 kg.C/kg shrimp/day. The environmental impacts were mainly caused by energy use, farm-level effluents and transportation. It can be concluded that Pacific white shrimp farming system was an important part of environmental problems.