sewage treatment

简明释义

污水清化

英英释义

例句

1.Local authorities are encouraging businesses to reduce waste before sewage treatment.

当地政府鼓励企业在污水处理之前减少废物。

2.The city invested in a new facility for sewage treatment to improve water quality.

该城市投资新设施进行污水处理以改善水质。

3.The sewage treatment plant operates 24/7 to handle the city's wastewater.

该污水处理厂全天候运作以处理城市的废水。

4.Proper sewage treatment is essential for protecting public health.

适当的污水处理对保护公众健康至关重要。

5.Innovative technologies are being developed for efficient sewage treatment processes.

正在开发创新技术以提高污水处理过程的效率。

作文

Sewage treatment is a vital process in modern society that ensures the health and safety of our environment. It involves the removal of contaminants from wastewater, which is essential for protecting our water resources. The process of sewage treatment (污水处理) typically consists of several stages, including physical, chemical, and biological treatments. Each stage plays a crucial role in breaking down harmful substances and making the water safe for discharge back into the environment or for reuse.The first stage of sewage treatment (污水处理) is known as preliminary treatment. During this phase, large solids such as sticks, stones, and plastics are removed from the wastewater. This is usually accomplished through screening and grit removal processes. By eliminating these large particles, we can prevent damage to the equipment used in the subsequent treatment stages.Following preliminary treatment, the wastewater undergoes primary treatment. In this phase, the flow of sewage is allowed to settle in large tanks, where heavier solids sink to the bottom and form sludge. Meanwhile, lighter materials, such as oils and grease, float to the surface and are skimmed off. This step significantly reduces the amount of suspended solids and organic matter in the wastewater.The next stage is secondary treatment, which is often the most critical part of sewage treatment (污水处理). This process relies on biological methods to further reduce contaminants. Microorganisms, particularly bacteria, are introduced to the wastewater to consume the organic matter. This biological treatment can take place in aeration tanks, where air is pumped in to support the growth of these microorganisms. The result is a significant reduction in biochemical oxygen demand (BOD), which indicates the level of organic pollution in the water.After secondary treatment, the water may still contain some dissolved substances and pathogens. Therefore, the final stage is tertiary treatment, which aims to polish the treated wastewater. This can include additional filtration, disinfection (often using chlorine or ultraviolet light), and nutrient removal. The goal of tertiary treatment is to ensure that the water meets regulatory standards before it is released into natural bodies of water or reused for irrigation, industrial processes, or even drinking water after advanced purification.The importance of sewage treatment (污水处理) cannot be overstated. Proper treatment of sewage protects public health by reducing the risk of waterborne diseases. Moreover, it helps preserve ecosystems by preventing pollution from entering rivers, lakes, and oceans. Additionally, with the growing concern about water scarcity, treated wastewater can be an invaluable resource for agriculture and industry, contributing to sustainable water management practices.In conclusion, sewage treatment (污水处理) is an essential component of environmental protection and public health. As urban populations continue to grow, the demand for effective wastewater management will only increase. Investing in advanced sewage treatment technologies and infrastructure is crucial for ensuring a clean and safe environment for future generations. By understanding the processes involved in sewage treatment (污水处理) and their significance, we can appreciate the efforts required to maintain our water quality and protect our planet.

污水处理是现代社会中一个至关重要的过程，它确保了我们环境的健康和安全。它涉及从废水中去除污染物，对于保护我们的水资源至关重要。污水处理通常包括几个阶段，包括物理、化学和生物处理。每个阶段在分解有害物质和使水安全排放回环境或再利用方面都发挥着关键作用。污水处理的第一阶段称为初步处理。在这个阶段，大型固体物质，如树枝、石头和塑料，从废水中去除。这通常通过筛选和砂砾去除过程来实现。通过消除这些大颗粒，我们可以防止对后续处理阶段所用设备的损坏。在初步处理之后，废水会经历初级处理。在这个阶段，污水流被允许在大型水槽中沉淀，较重的固体沉到底部形成污泥。同时，较轻的材料，如油和脂肪，浮到表面并被撇去。这一步显著减少了废水中的悬浮固体和有机物的含量。下一个阶段是二级处理，这通常是污水处理中最关键的部分。这个过程依赖于生物方法进一步减少污染物。微生物，特别是细菌，被引入废水中以消耗有机物。这种生物处理可以在曝气池中进行，空气被泵入以支持这些微生物的生长。结果是生化需氧量（BOD）的显著降低，表明水中有机污染的水平。经过二级处理后，水中可能仍然含有一些溶解物质和病原体。因此，最后一个阶段是三级处理，旨在对处理过的废水进行精细处理。这可以包括额外的过滤、消毒（通常使用氯或紫外线）和营养物质去除。三级处理的目标是确保水在释放到自然水体或重新用于灌溉、工业过程甚至饮用水（经过先进净化）之前符合监管标准。污水处理的重要性不容小觑。妥善处理污水通过减少水传播疾病的风险来保护公众健康。此外，它通过防止污染物进入河流、湖泊和海洋来保护生态系统。此外，随着人们对水资源短缺的日益关注，处理过的废水可以成为农业和工业的宝贵资源，有助于可持续水管理实践。总之，污水处理是环境保护和公众健康的一个基本组成部分。随着城市人口的不断增长，对有效废水管理的需求只会增加。投资于先进的污水处理技术和基础设施对于确保未来世代的清洁和安全环境至关重要。通过理解污水处理中涉及的过程及其重要性，我们可以欣赏维护水质和保护地球所需的努力。