activated sludge

简明释义

活性淤泥

英英释义

例句

1.The wastewater treatment plant uses activated sludge to break down organic matter.

污水处理厂使用活性污泥来分解有机物。

2.The activated sludge system can effectively reduce nitrogen and phosphorus in wastewater.

活性污泥系统可以有效减少污水中的氮和磷。

3.After the aeration process, the activated sludge settles at the bottom of the tank.

在曝气过程后，活性污泥沉降在池底。

4.During the treatment process, activated sludge consumes dissolved organic substances.

在处理过程中，活性污泥消耗溶解的有机物质。

5.Monitoring the levels of activated sludge is crucial for efficient operation.

监测活性污泥的水平对高效运营至关重要。

作文

In the field of wastewater treatment, the term activated sludge refers to a process that utilizes microorganisms to break down organic matter in sewage. This method is widely used due to its efficiency and effectiveness in reducing pollutants before the treated water is discharged into the environment. The activated sludge process involves aerating the sewage to promote the growth of bacteria and other microorganisms that consume organic waste. This aeration creates a rich environment for these microorganisms, allowing them to thrive and multiply rapidly.The process begins when raw sewage enters a treatment plant. Here, it undergoes preliminary treatment to remove large solids and debris. Once the initial filtration is complete, the sewage is directed into an aeration tank where air is pumped in to facilitate the growth of microorganisms. During this stage, the organic materials in the sewage are consumed by the microorganisms, leading to the formation of activated sludge—a dense mass of microorganisms and organic matter.After sufficient aeration, the mixture of water and activated sludge is transferred to a settling tank. In this tank, the heavier particles settle at the bottom, forming a sludge layer. This settled sludge can then be recycled back to the aeration tank to maintain the microbial population or removed as waste. The clear water that remains on top is the treated effluent, which can be safely discharged or further treated depending on regulatory standards.One of the key benefits of the activated sludge process is its ability to adapt to varying loads of organic material. The microorganisms can adjust their metabolism based on the concentration of pollutants, making this method highly flexible. Additionally, the activated sludge system can be optimized through various operational strategies, such as adjusting the aeration time and the amount of returned sludge, to enhance treatment efficiency.Despite its advantages, there are challenges associated with the activated sludge process. For instance, if the concentration of organic matter is too high, it can lead to the overgrowth of certain microorganisms, resulting in a phenomenon known as 'bulking.' Bulking can cause the sludge to fail to settle properly, leading to poor treatment performance and potential violations of discharge permits. Therefore, careful monitoring and control of the treatment process are essential to prevent such issues.Moreover, the activated sludge process requires significant energy input for aeration, which can contribute to operational costs. As environmental concerns grow, many treatment facilities are exploring ways to reduce energy consumption in the activated sludge process. Innovations such as using alternative energy sources or optimizing aeration techniques are being researched to improve sustainability.In conclusion, the activated sludge process plays a crucial role in modern wastewater treatment. It effectively reduces organic pollutants through the use of microorganisms, making it a vital component in protecting our water resources. By understanding the intricacies of the activated sludge process, we can appreciate its significance in maintaining environmental health and strive for advancements that enhance its efficiency and sustainability.

在废水处理领域，术语活性污泥指的是一种利用微生物分解污水中有机物的过程。由于其在减少污染物方面的效率和有效性，这种方法被广泛使用，以确保处理后的水在排放到环境之前达到安全标准。活性污泥工艺涉及对污水进行曝气，以促进细菌和其他微生物的生长，这些微生物会消耗有机废物。这种曝气创造了一个丰富的环境，使这些微生物能够繁衍生息，迅速增殖。该过程始于原污水进入处理厂。在这里，它经过初步处理以去除大颗粒固体和杂物。一旦初步过滤完成，污水就会被导入曝气池，在这里空气被泵入以促进微生物的生长。在这个阶段，污水中的有机物质被微生物消耗，从而形成活性污泥——一种由微生物和有机物质组成的致密物质。经过充分的曝气后，水和活性污泥的混合物被转移到沉淀池。在这个池中，较重的颗粒沉淀到底部，形成污泥层。这些沉淀的污泥可以被回收回曝气池，以维持微生物种群，或作为废物被去除。上层的清水就是经过处理的出水，可以根据法规标准安全排放或进一步处理。活性污泥工艺的一个关键优点是其能够适应不同负荷的有机物质。微生物可以根据污染物浓度调整其代谢，使这种方法具有高度的灵活性。此外，通过调整曝气时间和返回污泥量等各种操作策略，可以优化活性污泥系统，以提高处理效率。尽管有其优势，活性污泥工艺也面临一些挑战。例如，如果有机物质浓度过高，可能导致某些微生物的过度生长，从而产生“膨胀”现象。膨胀会导致污泥无法正常沉淀，从而导致处理性能下降，并可能违反排放许可证。因此，仔细监测和控制处理过程对于防止此类问题至关重要。此外，活性污泥工艺需要大量的能量投入用于曝气，这可能会增加运营成本。随着环境问题的日益严重，许多处理设施正在探索减少活性污泥过程能耗的方法。诸如使用替代能源或优化曝气技术等创新正在被研究，以改善可持续性。总之，活性污泥工艺在现代废水处理中发挥着至关重要的作用。它通过利用微生物有效减少有机污染物，使其成为保护水资源的重要组成部分。通过理解活性污泥过程的复杂性，我们可以更好地欣赏其在维护环境健康中的重要性，并努力寻求提升其效率和可持续性的进步。