sewage purification

简明释义

污水清化

英英释义

例句

1.The process of sewage purification involves several stages, including filtration and chemical treatment.

污水净化过程包括多个阶段，诸如过滤和化学处理。

2.Many industries are required to implement sewage purification systems to comply with regulations.

许多行业被要求实施污水净化系统以遵守法规。

3.Research shows that advanced sewage purification techniques can significantly reduce pollutants.

研究表明，先进的污水净化技术可以显著减少污染物。

4.The city invested in a new facility for sewage purification to improve water quality.

该市投资建设了一座新的污水净化设施，以改善水质。

5.Effective sewage purification can help reduce the environmental impact of wastewater disposal.

有效的污水净化可以帮助减少废水处理对环境的影响。

作文

Sewage is a byproduct of urbanization and industrialization, and it poses significant challenges to environmental sustainability and public health. As cities grow and populations increase, the amount of waste generated also rises, making effective sewage purification (污水净化) essential. The process of sewage purification involves treating wastewater to remove contaminants before it is released back into the environment or reused. This not only helps protect our water sources but also conserves valuable resources that can be recovered from sewage.The first step in sewage purification is the collection of wastewater from households, industries, and stormwater runoff. Once collected, the sewage is transported to a treatment facility where it undergoes several stages of processing. The primary stage involves the removal of large solids through screening and sedimentation. This is crucial as it prevents damage to subsequent treatment equipment and ensures that the process runs smoothly.Following the primary treatment, the sewage enters the secondary treatment phase, where biological processes are employed. Microorganisms are introduced to break down organic matter, effectively reducing the biochemical oxygen demand (BOD) of the wastewater. This stage is vital because high levels of organic material can lead to oxygen depletion in receiving water bodies, harming aquatic life. Aerobic and anaerobic digestion are common methods used during this phase, each with its unique advantages.After biological treatment, the sewage may undergo tertiary treatment, which further purifies the water. This stage can include advanced filtration, chemical treatment, and disinfection processes such as chlorination or ultraviolet light exposure. Tertiary treatment aims to remove remaining contaminants, including nutrients like nitrogen and phosphorus that can contribute to algal blooms in lakes and rivers.The final step in sewage purification is the safe disposal or reuse of the treated water. In many regions, treated sewage is discharged into rivers, lakes, or oceans, where it can safely mix with natural water bodies. However, increasingly, municipalities are recognizing the value of reclaimed water for irrigation, industrial processes, and even drinking water in some cases, known as potable reuse. This not only alleviates pressure on freshwater resources but also promotes sustainability.Despite the advancements in sewage purification technologies, challenges remain. Aging infrastructure, funding limitations, and public perception can hinder the effectiveness of sewage treatment systems. Moreover, emerging contaminants, such as pharmaceuticals and microplastics, pose new risks that traditional treatment methods may not adequately address. Therefore, ongoing research and innovation in the field of wastewater treatment are essential.In conclusion, sewage purification (污水净化) is a critical process that plays a vital role in protecting public health and preserving the environment. By efficiently treating wastewater, we can mitigate the impacts of pollution, recover valuable resources, and promote sustainable water management practices. As global populations continue to rise, the importance of effective sewage treatment will only grow, underscoring the need for continued investment and innovation in this essential field.

污水是城市化和工业化的副产品，对环境可持续性和公共健康构成重大挑战。随着城市的增长和人口的增加，产生的废物数量也在上升，这使得有效的污水净化（sewage purification）变得至关重要。污水净化的过程涉及对废水进行处理，以去除污染物，然后再将其释放回环境或重新利用。这不仅有助于保护我们的水源，还能回收污水中可利用的宝贵资源。污水净化的第一步是从家庭、工业和雨水径流中收集废水。一旦收集到，污水会被运输到处理设施，在那里经过几个阶段的处理。初级阶段涉及通过筛选和沉淀去除大颗粒固体。这一点至关重要，因为它可以防止对后续处理设备造成损害，并确保过程顺利进行。在初级处理之后，污水进入二级处理阶段，在这一阶段中采用生物过程。微生物被引入以分解有机物，有效降低废水的生化需氧量（BOD）。这一阶段至关重要，因为高水平的有机物可能导致接受水体中的氧气耗竭，危害水生生命。好氧和厌氧消化是这一阶段常用的方法，各有其独特的优点。经过生物处理后，污水可能会经历三级处理，进一步净化水质。这一阶段可以包括先进的过滤、化学处理以及氯化或紫外线照射等消毒过程。三级处理旨在去除剩余的污染物，包括氮和磷等营养物质，这些物质可能导致湖泊和河流中的藻类繁殖。污水净化的最后一步是安全处置或再利用处理过的水。在许多地区，经过处理的污水被排放到河流、湖泊或海洋中，在那里可以安全地与自然水体混合。然而，越来越多的市政当局认识到回收水在灌溉、工业过程甚至在某些情况下的饮用水（称为可饮用再利用）中的价值。这不仅减轻了对淡水资源的压力，还促进了可持续性。尽管在污水净化技术方面取得了进展，但仍然存在挑战。老化的基础设施、资金限制和公众认知可能会阻碍污水处理系统的有效性。此外，新兴污染物，如药物和微塑料，带来了传统处理方法可能无法充分应对的新风险。因此，废水处理领域的持续研究和创新是必不可少的。总之，污水净化（sewage purification）是一个关键过程，在保护公共健康和保护环境方面发挥着至关重要的作用。通过有效处理废水，我们可以减轻污染的影响，回收宝贵资源，并促进可持续水管理实践。随着全球人口的不断增长，有效污水处理的重要性只会增加，这凸显了在这一重要领域继续投资和创新的必要性。