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   organic source 在 环境科学与资源利用 分类中 的翻译结果: 查询用时:0.168秒
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organic source
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  有机碳源
    In addition, in BAF of steady operation, there existed the phenomenon considerable nitrogen loss. Analysis hold that at oxygen-limited condition and no organic source, there happened in the biological membrane autotrophic denitrification of mainly. Anammox reaction, with considerable nitrogen loss in N2 form.
    此外,稳定运行的 BAF 内存在大量氮流失现象,分析认为,限制供氧和无有机碳源时,生物膜内发生了以 Anammox反应为主的自养反硝化作用,大量的氮以 N2的形式流失.
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  “organic source”译为未确定词的双语例句
    Variation of δ15N of N2 and N2O emitted from wastewater by artificial synthesisin a close system was traced by Thermo Finnigan MAT253. The determination resultsshowed the energy metabolism approach of the strains under the condition with lowoxygen content without organic source.
    作者应用 N 示踪技术,采用气相质谱仪 Thermo Finnigan MAT253 对封闭系统气相的 N2和 N2O 的丰度检测,考察研究所筛选的菌株在缺氧、低碳或无碳源条件下的兼性氨氧化能量代谢途径。
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    After completing the process of making actual municipal wastewater as the sole organic source, the stability of the aerobic granular is investigated by increasing the organic loading rate.
    在完成全部由实际生活污水进水后,通过提高有机负荷来研究好氧颗粒污泥的稳定性。
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    They are either environmental contaminants or important organic source of compounds, such as Pharmaceuticals and flavors.
    它们一方面对环境造成严重污染,危害人类健康; 另一方面又是重要的有机原,如医药中间体和高附加值的香料化合物。
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  organic source
We have used the;metal-organic source diethylaluminum ethoxide (DEAlO) to intentionally incorporate oxygen-related defects during growth of Al0.5In0.5P by metal-organic vapor phase epitaxy (MOVPE).
      
The degrading strain ACE2 is involved in the process of corrosion of steel API 5LX and also utilizes the inhibitor as organic source.
      
When urea as an organic source of nitrogen for the fungus, was added to the MWW, the decolorizing activity of P.
      
A high-quality organic source, Tithonia diversifolia (Hemsley) A.
      
Results suggest that phytoplankton rather thanSpartina alterniffora is the likely organic source in bottom sediment of the larger bay near the coast (e.g.
      
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Methane is an important greenhouse gas. Its relative potential for thermal absorption is 30 times greater than that of CO2. About 80% of methane in atmosphere is from organic source. Wetland is an important source of CH4 emissions on a global scale because of the anaerobie conditions created by flooding soils. Methane emits from wetland to atmosphere only when production rate of methane is higher than oxidation rate of methane. The article discusses the present conditions of research on production...

Methane is an important greenhouse gas. Its relative potential for thermal absorption is 30 times greater than that of CO2. About 80% of methane in atmosphere is from organic source. Wetland is an important source of CH4 emissions on a global scale because of the anaerobie conditions created by flooding soils. Methane emits from wetland to atmosphere only when production rate of methane is higher than oxidation rate of methane. The article discusses the present conditions of research on production and e-mission of methane and gives a suggestion of further research on emission of methane in wetland.

甲烷是一种重要的温室气体,对地球气候的形成有重要影响.湿地甲烷在大气甲烷的各种排放源中占有很大比例.本文对湿地甲烷的产生、排放及其影响因素,对其在时间和空间上的差异性规律等方面进行了综合评述.

This paper seeks to discuss the methodology to optimize the external energy input into farmland ecosystems, with an aim to providing realistic guidance to agricultural production. Since the 1960s a large number of studies on energy use in farmland ecosystems have been carried out and it has been shown that energy productivity and efficiency appears to be closely linked to specific characteristics of the land. Experimental work further revealed the sigmoidal relationship between energy input and output under...

This paper seeks to discuss the methodology to optimize the external energy input into farmland ecosystems, with an aim to providing realistic guidance to agricultural production. Since the 1960s a large number of studies on energy use in farmland ecosystems have been carried out and it has been shown that energy productivity and efficiency appears to be closely linked to specific characteristics of the land. Experimental work further revealed the sigmoidal relationship between energy input and output under given production conditions, showing that system energy output is positively related to input up to a certain point, after which system energy output asymptotically approaches a plateau level. This sigmoidal relationship is analogous with the ecological Logistic function of the population growth curve under limited spatial and resource conditions. Hence, the Logistic function was utilized to plot the relationship between energy input and productivity in farmland ecosystems. Using collected data from a specific farmland ecosystem, it is possible to calculate the potential maximum energy output, K m, and the estimated coefficients, r and C, in the Logistic model. According to this model the theoretical energy output of the agroecosystem at any given energy input level could be calculated.The marginal energy productivity (MEP), the average energy productivity (AEP) and the elasticity of energy input (EEI) were utilized to characterize the energy use efficiency of agroecosystems. According to the characteristics of Logistic function, the dynamics of MEP, AEP and EEI in agroecosystems were thoroughly analyzed. It was concluded that the rational range of energy input may be calculated by setting EEI within the inequality 0≤1. In addition, it is theoretically possible to identify the optimum amount of energy input to the system where the optimal input represents the input that meets a balance between the output of the system and economic profit. The optimal input can be calculated from the principle of marginal equilibrium, which suggests that the optimal energy input should be the point where the marginal return per unit of input applied is equal to the marginal cost of the input. Given that energy efficiency is related to the pattern of energy inputs represented by a parabolic function as reported by Yang (1985), the optimal pattern of energy inputs, at which maximum energy efficiency is achieved, can be calculated by setting the first derivative of the parabolic function equal to zero.A case study in Deqing County, Zhejiang Province is presented to demonstrate the application of the above methodology. Time-series data (1984~1994) were collected from the local Yearbook of Deqing Agricultural Statistics, and an extensive on-site survey was also carried out to supplement the sources of data. Results indicated that the average total amount of energy inputs and outputs per unit area over the period showed little change, while the pattern of energy inputs changed greatly with significant increase in total energy from inorganic sources and dramatic decrease in that from organic sources. The study area's farmland ecosystems in Deqing County were classified into three agroecosystems, namely the high-yielding agreocosystems, the medium yielding agroecosystems and the lower yielding agroecosystems. Three energy input and output databases were created, and then utilized to calculate K m, r and C for the energy input and output models by setting the Logistic function in non-linear regression interface and running the programme in SPSS 8.0 software. The estimated values of K m, r and C were utilized to establish the energy input and output models for the three agroecosystems. Using the above methodology, the rational ranges of energy inputs for the three agroecosystems were calculated and these are 49.80~291.16×10 9J/hm 2 for the high yielding agroecosystems, 34.85~221.59×10 9J/hm 2 for the medium agroecosystems and 19.62~144.19×10 9J/hm 2 for the lower agroecosytstems; and the optimal amounts of energy inputs are 16

在实地调察研究的基础上 ,分析了 1 984~ 1 994年浙江省德清县农田生态系统的能量投入和产出的动态变化趋势 ,根据农田生态系统的能量转化规律 ,建立了该县农田生态系统的能量投入产出模型 ,利用边际平衡理论和分析方法确定了该县农田生态系统的能量投入合理范围、最优投能量和最优投能结构。结果表明 ,德清县农田生态系统的平均单位面积能量投入和产出总量差异不大 ,但从其投能结构来看 ,差异却极其显著 ,表现为投入的有机能迅速减少 ,而投入的无机能大幅度增加。能量产投比虽有波动 ,但差异不甚明显。经优化确定 ,该县高产、中产和低产农田生态系统的能量投入合理范围分别为 4 9.80~ 2 91 .1 6× 1 0 9J/ hm2 、34 .85~ 2 2 1 .5 9× 1 0 9J/ hm2 和 1 9.6 2~ 1 4 4 .1 9× 1 0 9J/ hm2 ;最优投能量分别为1 6 6 .0 8× 1 0 9J/ hm2 、1 2 2 .83× 1 0 9J/ hm2 和 74 .0 8× 1 0 9J/ hm2 ;最优投能结构分别为 1 .90 1 9、3.71 88和 6 .6 2 2 5。表明为提高有限...

在实地调察研究的基础上 ,分析了 1 984~ 1 994年浙江省德清县农田生态系统的能量投入和产出的动态变化趋势 ,根据农田生态系统的能量转化规律 ,建立了该县农田生态系统的能量投入产出模型 ,利用边际平衡理论和分析方法确定了该县农田生态系统的能量投入合理范围、最优投能量和最优投能结构。结果表明 ,德清县农田生态系统的平均单位面积能量投入和产出总量差异不大 ,但从其投能结构来看 ,差异却极其显著 ,表现为投入的有机能迅速减少 ,而投入的无机能大幅度增加。能量产投比虽有波动 ,但差异不甚明显。经优化确定 ,该县高产、中产和低产农田生态系统的能量投入合理范围分别为 4 9.80~ 2 91 .1 6× 1 0 9J/ hm2 、34 .85~ 2 2 1 .5 9× 1 0 9J/ hm2 和 1 9.6 2~ 1 4 4 .1 9× 1 0 9J/ hm2 ;最优投能量分别为1 6 6 .0 8× 1 0 9J/ hm2 、1 2 2 .83× 1 0 9J/ hm2 和 74 .0 8× 1 0 9J/ hm2 ;最优投能结构分别为 1 .90 1 9、3.71 88和 6 .6 2 2 5。表明为提高有限资源的利用效率 ,对该县不同类型的农田生态系统 ,应采取不同的投能策略

Adopting upflow biological aerated filter (BAF) with porous medium-lava as carrier with the nitrification and denitrification characteristics of the reactor with no organic carbon source were studied under the oxygen-limited condition. In the range of test temperature (10~30℃), 20℃ was a temperature critical point, the nitrification rate was slow at lower than 20℃, but the rate was accelerated at higher than 20℃. As temperature raised from 20 to 30℃, the rate increased slowly (only 10%). This character was...

Adopting upflow biological aerated filter (BAF) with porous medium-lava as carrier with the nitrification and denitrification characteristics of the reactor with no organic carbon source were studied under the oxygen-limited condition. In the range of test temperature (10~30℃), 20℃ was a temperature critical point, the nitrification rate was slow at lower than 20℃, but the rate was accelerated at higher than 20℃. As temperature raised from 20 to 30℃, the rate increased slowly (only 10%). This character was completely different from the influence of nitrification rate in suspended growth reactor. In addition, in BAF of steady operation, there existed the phenomenon considerable nitrogen loss. Analysis hold that at oxygen-limited condition and no organic source, there happened in the biological membrane autotrophic denitrification of mainly. Anammox reaction, with considerable nitrogen loss in N2 form.

采用多孔介质——火山岩为载体的上向流曝气生物滤池(BAF),研究了限制供氧条件下,无有机碳源时反应器的硝化反硝化特性.结果表明,在 10~30℃范围内,20℃为临界点,低于20℃时,硝化速率缓慢;高于 20℃后,硝化速率加快.温度从 20℃升高到 30℃,硝化速率增长仅为10%,这一特性与悬浮生长反应器内温度对硝化速率的影响完全不同.此外,稳定运行的 BAF 内存在大量氮流失现象,分析认为,限制供氧和无有机碳源时,生物膜内发生了以 Anammox反应为主的自养反硝化作用,大量的氮以 N2的形式流失.

 
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