denitrifying

简明释义

英[ˌdiːˈnaɪtrɪfaɪɪŋ]美[ˌdiːˈnaɪtrɪfaɪɪŋ]

v. 除去（土壤、空气或水等）中的（亚）硝酸盐；使脱氮，去氮；使反硝化（denitrify 的现在分词）

英英释义

单词用法

同义词

反义词

例句

1.The ecological distribution of denitrifying bacteria in the three soils was studied.

研究了三种土壤反硝化细菌的生态分布。

2.The experimental results indicate that nitrate can be effectively removed using biodegradable meal box(BMB) as carbon source and biofilm carrier of denitrifying microorganisms.

结果表明，以可降解餐盒为碳源和微生物附着载体进行异养反硝化，能有效去除水中的硝酸盐。

3.The denitrifying rate in the aerobic stage was accounted for 37.0% of the denitrification in the whole reaction period.

好氧阶段的反硝化效率约占整个反应周期脱氮效率的37.0%。

4.The mixture of aerobic and anaerobic sludge is used to culture denitrifying bacteria using ammonium as donors in anoxic reactor. The aim of NH3-N degradation in anoxic reactor is achieved.

将好氧污泥与厌氧污泥混合培养，在缺氧反应器中培养出了厌氧氨氧化细菌，实现了在缺氧反应器中进一步降解NH3-N的目标。

5.Effect of nitrate concentration on phosphorus removal in denitrifying dephosphatation system;

目的研究碳源浓度变化对同步反硝化聚磷的影响。

6.The mixture of aerobic and anaerobic sludge is used to culture denitrifying bacteria using ammonium as donors in anoxic reactor. The aim of NH3-N degradation in anoxic reactor is achieved.

将好氧污泥与厌氧污泥混合培养，在缺氧反应器中培养出了厌氧氨氧化细菌，实现了在缺氧反应器中进一步降解NH3-N的目标。

7.The beneficial ammonifier and the nitrifying bacteria double increase, while the unbeneficial anaerobic bacteria and denitrifying bacteria are inhibited.

有益的氨化细菌和硝化细菌成倍增加，而无益的厌氧性细菌、反硝化细菌则受抑制。

8.In wetlands, denitrifying microorganisms help reduce nitrogen levels in the water.

在湿地中，反硝化微生物有助于降低水中的氮水平。

9.Research shows that denitrifying bacteria can thrive in anaerobic conditions.

研究表明，反硝化细菌可以在厌氧条件下生存。

10.The process of denitrifying bacteria is crucial for maintaining soil health.

反硝化细菌的过程对维持土壤健康至关重要。

11.Farmers often utilize denitrifying techniques to improve crop yield.

农民通常利用反硝化技术来提高作物产量。

12.The denitrifying process converts harmful nitrates into harmless nitrogen gas.

反硝化过程将有害的硝酸盐转化为无害的氮气。

作文

In the intricate web of ecosystems, various processes work together to maintain balance and sustainability. One such crucial process is the action of microorganisms that are responsible for the conversion of nitrogen compounds in the soil. Among these microorganisms, those that perform the process of denitrifying (脱氮) play a vital role in the nitrogen cycle, which is essential for plant growth and overall ecosystem health. This essay will explore the significance of denitrifying (脱氮) bacteria, their mechanisms, and their impact on agriculture and the environment.The nitrogen cycle is a natural process that involves the transformation of nitrogen from one form to another in the environment. Nitrogen is an essential nutrient for plants, as it is a key component of amino acids, proteins, and nucleic acids. However, most organisms cannot utilize atmospheric nitrogen directly. This is where denitrifying (脱氮) bacteria come into play. These microorganisms convert nitrates and nitrites in the soil back into nitrogen gas, which is then released into the atmosphere. This process not only helps to regulate nitrogen levels in the soil but also prevents the accumulation of excess nitrates that can lead to environmental issues such as water pollution.The primary groups of denitrifying (脱氮) bacteria include Pseudomonas, Paracoccus, and Bacillus species. These bacteria thrive in anaerobic conditions, where oxygen is limited, making them particularly effective in wet soils or areas with low oxygen availability. The process of denitrifying (脱氮) involves several steps, including the reduction of nitrate to nitrite, followed by the reduction of nitrite to nitric oxide, nitrous oxide, and finally, nitrogen gas. Each step is facilitated by specific enzymes that these bacteria produce, showcasing their remarkable adaptability and efficiency in nutrient cycling.The importance of denitrifying (脱氮) bacteria extends beyond the nitrogen cycle; they also have significant implications for agriculture. Farmers often rely on synthetic fertilizers to enhance crop yields. However, excessive use of these fertilizers can lead to nutrient runoff, causing eutrophication in nearby water bodies. Eutrophication results in algal blooms that deplete oxygen in the water, harming aquatic life. By promoting the activity of denitrifying (脱氮) bacteria in agricultural practices, farmers can reduce nitrate levels in the soil and minimize the risk of water pollution. This can be achieved through practices such as cover cropping, crop rotation, and reduced tillage, which create favorable conditions for these beneficial microorganisms.Moreover, denitrifying (脱氮) bacteria contribute to climate change mitigation. The production of nitrous oxide, a potent greenhouse gas, can occur when excess nitrogen is present in the soil. However, when denitrifying (脱氮) bacteria effectively convert nitrates into nitrogen gas, they help to lower nitrous oxide emissions. Therefore, understanding and enhancing the activity of these bacteria can be a strategic approach to both improve soil health and combat climate change.In conclusion, denitrifying (脱氮) bacteria are indispensable players in the nitrogen cycle, contributing to nutrient cycling, agricultural sustainability, and environmental protection. Their ability to convert nitrates back into atmospheric nitrogen not only maintains soil health but also mitigates the adverse effects of fertilizer use and climate change. As we strive for a more sustainable future, recognizing the value of these microorganisms and integrating their role into agricultural practices will be crucial for achieving ecological balance and ensuring food security.