chemical oxygen demand

简明释义

化学需氧量

英英释义

例句

1.The water treatment facility regularly tests the chemical oxygen demand 化学需氧量 to assess the level of organic pollutants.

水处理设施定期测试化学需氧量 chemical oxygen demand以评估有机污染物的水平。

2.Reducing the chemical oxygen demand 化学需氧量 in rivers is essential for protecting aquatic life.

降低河流中的化学需氧量 chemical oxygen demand对保护水生生物至关重要。

3.Monitoring the chemical oxygen demand 化学需氧量 helps in determining the efficiency of wastewater treatment processes.

监测化学需氧量 chemical oxygen demand有助于确定废水处理过程的效率。

4.Regulatory agencies often set limits on the chemical oxygen demand 化学需氧量 for industrial discharges.

监管机构通常对工业排放的化学需氧量 chemical oxygen demand设定限制。

5.A high chemical oxygen demand 化学需氧量 indicates that the water is heavily polluted with organic materials.

高化学需氧量 chemical oxygen demand表明水中有机物质污染严重。

作文

Chemical oxygen demand (COD) is a critical parameter in environmental science and water quality management. It measures the amount of oxygen required to chemically oxidize organic and inorganic substances in water. Understanding COD is essential for assessing the pollution levels in water bodies, as it provides insights into the organic matter present in the water. High levels of COD indicate significant pollution, which can lead to detrimental effects on aquatic life and overall ecosystem health. In industrial processes, particularly those involving wastewater treatment, monitoring chemical oxygen demand (化学需氧量) is vital. Industries such as textiles, food processing, and pharmaceuticals often discharge effluents that contain high concentrations of organic pollutants. By measuring chemical oxygen demand, facilities can determine the effectiveness of their treatment processes and ensure compliance with environmental regulations. The measurement of chemical oxygen demand typically involves a laboratory test where a water sample is treated with a strong oxidizing agent under controlled conditions. The amount of oxygen consumed during this process is then quantified, providing a clear indication of the organic load present in the sample. This information is crucial for environmental monitoring and helps in the formulation of strategies to reduce pollution. Moreover, understanding chemical oxygen demand is not only important for industries but also for municipal wastewater treatment plants. These facilities are responsible for treating sewage and wastewater before it is released back into the environment. By regularly measuring chemical oxygen demand, operators can optimize treatment processes and improve the quality of discharged water, thus protecting local water bodies from contamination. In addition to its role in pollution assessment, chemical oxygen demand is also an important factor in the design of wastewater treatment systems. Engineers and environmental scientists use COD values to size treatment units and select appropriate technologies. For instance, if the chemical oxygen demand of incoming wastewater is too high, additional treatment steps may be necessary to meet regulatory standards. Furthermore, the relationship between chemical oxygen demand and biological oxygen demand (BOD) is often discussed in the context of water quality. While BOD measures the amount of oxygen consumed by microorganisms during the decomposition of organic matter, COD provides a broader picture by accounting for both biodegradable and non-biodegradable substances. This distinction is important for developing effective waste management strategies. In conclusion, chemical oxygen demand (化学需氧量) plays a pivotal role in environmental science and water quality management. It serves as a key indicator of water pollution and is essential for the effective treatment of wastewater. By understanding and monitoring chemical oxygen demand, industries and municipalities can work towards reducing their environmental impact and ensuring the sustainability of aquatic ecosystems. As we continue to face challenges related to water pollution, the importance of measuring and managing chemical oxygen demand will only grow, highlighting the need for ongoing research and innovation in this field.

化学需氧量（COD）是环境科学和水质管理中的一个关键参数。它测量水中化学氧化有机物和无机物所需的氧气量。理解COD对于评估水体污染水平至关重要，因为它提供了水中有机物存在的见解。高水平的COD表明显著的污染，这可能对水生生物和整体生态系统健康造成有害影响。在工业过程中，特别是在废水处理方面，监测化学需氧量（COD）是至关重要的。纺织、食品加工和制药等行业通常会排放含有高浓度有机污染物的废水。通过测量化学需氧量，企业可以确定其处理过程的有效性，并确保符合环境法规。化学需氧量的测量通常涉及实验室测试，其中水样在受控条件下用强氧化剂处理。然后量化在此过程中消耗的氧气量，从而清楚地指示样本中存在的有机负荷。这些信息对于环境监测至关重要，并有助于制定减少污染的策略。此外，理解化学需氧量不仅对工业重要，对市政废水处理厂也同样重要。这些设施负责处理污水和废水，然后再将其释放回环境中。通过定期测量化学需氧量，操作人员可以优化处理过程，提高排放水的质量，从而保护当地水体免受污染。除了在污染评估中的作用外，化学需氧量还是设计废水处理系统的重要因素。工程师和环境科学家利用COD值来确定处理单元的规模并选择合适的技术。例如，如果进水废水的化学需氧量过高，可能需要额外的处理步骤以满足法规标准。此外，化学需氧量与生物需氧量（BOD）之间的关系在水质背景下经常被讨论。虽然BOD测量微生物在分解有机物过程中消耗的氧气量，但COD通过考虑可生物降解和不可生物降解物质提供更广泛的视角。这一区别对于制定有效的废物管理策略至关重要。总之，化学需氧量（COD）在环境科学和水质管理中发挥着关键作用。它作为水污染的关键指标，对于有效的废水处理至关重要。通过理解和监测化学需氧量，工业和市政可以努力减少其环境影响，并确保水生生态系统的可持续性。随着我们继续面临与水污染相关的挑战，测量和管理化学需氧量的重要性只会增加，这突显了在这一领域进行持续研究和创新的必要性。