biochemical oxygen demand

简明释义

生化需氧量

英英释义

例句

1.The city implemented new regulations to reduce the biochemical oxygen demand (生化需氧量) in local water bodies.

该市实施了新规章，以减少当地水体中的生化需氧量。

2.Researchers conducted a study on the effects of industrial waste on biochemical oxygen demand (生化需氧量).

研究人员对工业废物对生化需氧量的影响进行了研究。

3.Monitoring the biochemical oxygen demand (生化需氧量) is crucial for assessing water quality.

监测生化需氧量对评估水质至关重要。

4.High levels of biochemical oxygen demand (生化需氧量) indicate pollution in the water supply.

高水平的生化需氧量表明水源受到污染。

5.Wastewater treatment plants aim to lower the biochemical oxygen demand (生化需氧量) before releasing water back into the environment.

污水处理厂旨在降低生化需氧量，然后再将水释放回环境中。

作文

Understanding the concept of biochemical oxygen demand is essential for anyone involved in environmental science and water quality management. Biochemical oxygen demand (BOD) is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water. It is an important parameter used to assess the health of a water body, as it indicates the level of pollution present. High levels of BOD suggest that there is a significant amount of organic material in the water, which can lead to oxygen depletion, adversely affecting aquatic life.The significance of biochemical oxygen demand lies in its direct correlation to the level of organic pollution. When wastewater is discharged into a river or lake, it often contains a variety of organic substances that bacteria and other microorganisms feed on. As these organisms break down the organic materials, they consume oxygen from the water. This process can result in lower oxygen levels, making it difficult for fish and other aquatic organisms to survive. Therefore, monitoring BOD levels is crucial for maintaining the ecological balance in aquatic environments.In practical terms, measuring biochemical oxygen demand involves collecting water samples and incubating them under controlled conditions for a specified period, typically five days at 20 degrees Celsius. The decrease in dissolved oxygen is then measured and reported in milligrams per liter (mg/L). This value provides insight into the organic load present in the water sample. For instance, a BOD value of 5 mg/L is considered low and indicates good water quality, while values above 30 mg/L are generally considered high and indicative of pollution.Furthermore, understanding biochemical oxygen demand is not only relevant for assessing water quality but also for designing wastewater treatment processes. Treatment plants aim to reduce the BOD of effluent before it is released back into natural water bodies. Various methods such as activated sludge processes, biofilters, and anaerobic digestion are employed to decrease BOD levels effectively. By doing so, these facilities help to protect aquatic ecosystems and comply with environmental regulations.In conclusion, the concept of biochemical oxygen demand is fundamental in the fields of environmental science and water management. It serves as a key indicator of water quality and the health of aquatic ecosystems. Understanding and monitoring BOD levels can aid in identifying pollution sources, guiding treatment strategies, and ensuring the sustainability of our water resources. As we continue to face challenges related to water pollution, the importance of managing biochemical oxygen demand will only grow, making it a critical area of focus for researchers, policymakers, and environmentalists alike.

理解生化需氧量的概念对于任何参与环境科学和水质管理的人来说都是至关重要的。生化需氧量（BOD）是一个衡量微生物在水中分解有机物时消耗的氧气量的指标。它是评估水体健康的重要参数，因为它指示了存在的污染水平。高BOD水平表明水中有大量有机物，这可能导致氧气耗尽，严重影响水生生物。生化需氧量的重要性在于它与有机污染水平直接相关。当废水排入河流或湖泊时，通常含有多种微生物以外的有机物质。随着这些生物分解有机材料，它们会消耗水中的氧气。这一过程可能导致氧气水平下降，使得鱼类和其他水生生物难以生存。因此，监测BOD水平对于维护水生环境的生态平衡至关重要。在实际操作中，测量生化需氧量涉及收集水样，并在控制条件下进行特定时间的培养，通常是在20摄氏度下五天。然后测量溶解氧的减少，并以毫克每升（mg/L）报告该值。这个值提供了水样中有机负荷的洞察。例如，5 mg/L的BOD值被认为是低的，表明水质良好，而超过30 mg/L的值通常被认为是高的，表明存在污染。此外，理解生化需氧量不仅与评估水质相关，还与设计废水处理过程密切相关。处理厂旨在降低排放水的BOD值，然后再将其释放回自然水体。采用活性污泥法、生物滤池和厌氧消化等多种方法有效降低BOD水平。通过这样做，这些设施帮助保护水生生态系统，并遵守环境法规。总之，生化需氧量的概念在环境科学和水管理领域是基础性的。它作为水质和水生生态系统健康的关键指标。理解和监测BOD水平可以帮助识别污染源，引导处理策略，并确保我们的水资源的可持续性。随着我们继续面临与水污染相关的挑战，管理生化需氧量的重要性只会增加，这使其成为研究人员、政策制定者和环保人士共同关注的关键领域。