biochemical oxygen demand

简明释义

生化耗氧量

英英释义

例句

1.To improve aquatic life, the factory had to lower its biochemical oxygen demand 生化需氧量 emissions.

为了改善水生生物，工厂必须降低其生化需氧量排放。

2.The environmental agency released a report on the biochemical oxygen demand 生化需氧量 of local rivers.

环境机构发布了一份关于当地河流生化需氧量的报告。

3.High levels of biochemical oxygen demand 生化需氧量 can indicate pollution from organic materials.

高水平的生化需氧量可能表明有机物质造成的污染。

4.The city implemented a new wastewater treatment process to reduce the biochemical oxygen demand 生化需氧量 in the river.

该市实施了一种新的污水处理工艺，以减少河流中的生化需氧量。

5.Monitoring the biochemical oxygen demand 生化需氧量 is essential for assessing water quality in lakes.

监测生化需氧量对于评估湖泊水质至关重要。

作文

Understanding the concept of biochemical oxygen demand is crucial for anyone involved in environmental science or wastewater management. Biochemical oxygen demand (often abbreviated as BOD) is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. This parameter is vital because it helps to determine the level of pollution in water bodies and assess the effectiveness of wastewater treatment processes.In essence, biochemical oxygen demand indicates the health of an aquatic ecosystem. High levels of BOD suggest that there is a significant amount of organic material present in the water, which can lead to oxygen depletion. When organic matter decomposes, it requires oxygen, and if the demand is high, it can result in lower oxygen levels available for fish and other aquatic organisms. Consequently, understanding BOD is essential for maintaining healthy water bodies and ensuring the survival of aquatic life.The measurement of biochemical oxygen demand typically involves taking a water sample and measuring the amount of dissolved oxygen (DO) before and after a specific incubation period, usually five days at a temperature of 20 degrees Celsius. The difference in DO levels indicates how much oxygen was consumed by the microbes in the sample, thus providing a quantitative measure of BOD.In wastewater treatment, monitoring biochemical oxygen demand is a standard practice. It helps engineers and environmental scientists design more effective treatment systems. For example, if a wastewater treatment plant has a high BOD in its influent, it may need to implement additional treatment stages to reduce the organic load before discharging the treated water into natural water bodies. Failure to adequately reduce BOD can lead to severe ecological consequences, including fish kills and loss of biodiversity.Moreover, biochemical oxygen demand is not only applicable to wastewater treatment but also plays a role in assessing the health of rivers, lakes, and other water bodies. Regular monitoring of BOD levels can provide valuable insights into the impacts of agricultural runoff, industrial discharges, and urban development on water quality. For instance, an increase in BOD levels in a river could indicate that nearby agricultural practices are introducing excess nutrients and organic waste into the water, which can lead to algal blooms and further oxygen depletion.In conclusion, the concept of biochemical oxygen demand is a fundamental aspect of environmental science and water management. It serves as an indicator of water quality and the overall health of aquatic ecosystems. By understanding and monitoring BOD levels, we can take necessary actions to protect our water resources and ensure a sustainable environment for future generations. As we continue to face challenges such as pollution and climate change, the importance of controlling biochemical oxygen demand cannot be overstated. Effective management of BOD will help safeguard aquatic life and maintain the balance of our ecosystems.

理解生化需氧量的概念对于任何参与环境科学或废水管理的人来说都是至关重要的。生化需氧量（通常缩写为BOD）是微生物在水中分解有机物时消耗的氧气量的测量。这一参数至关重要，因为它有助于确定水体的污染水平以及评估废水处理过程的有效性。从本质上讲，生化需氧量指示了水生生态系统的健康状况。高水平的BOD表明水中存在大量有机物，这可能导致氧气耗竭。当有机物分解时，它需要氧气，如果需求很高，可能会导致可供鱼类和其他水生生物使用的氧气水平降低。因此，理解BOD对于维持健康的水体和确保水生生命的生存至关重要。生化需氧量的测量通常涉及取一个水样，在特定的孵育期（通常为20摄氏度下的五天）之前和之后测量溶解氧（DO）的量。DO水平的差异表示微生物在样本中消耗了多少氧气，从而提供了BOD的定量测量。在废水处理过程中，监测生化需氧量是标准做法。这帮助工程师和环境科学家设计更有效的处理系统。例如，如果废水处理厂的进水中BOD水平较高，可能需要实施额外的处理阶段，以在将处理后的水排放到自然水体之前减少有机负荷。如果未能充分降低BOD，可能会导致严重的生态后果，包括鱼类死亡和生物多样性的丧失。此外，生化需氧量不仅适用于废水处理，还在评估河流、湖泊和其他水体的健康方面发挥作用。定期监测BOD水平可以提供关于农业径流、工业排放和城市开发对水质影响的宝贵见解。例如，河流中的BOD水平增加可能表明附近的农业实践正在向水中引入过量的营养物质和有机废物，这可能导致藻类繁殖和进一步的氧气耗竭。总之，生化需氧量的概念是环境科学和水管理的基本方面。它作为水质和水生生态系统整体健康的指标。通过理解和监测BOD水平，我们可以采取必要的措施来保护我们的水资源，并确保未来世代的可持续环境。随着我们继续面临污染和气候变化等挑战，控制生化需氧量的重要性不容小觑。有效管理BOD将有助于保护水生生命并维持我们生态系统的平衡。