Water nourishes all things and is closely related to people's production and life.

With the rapid development of cities and the continuous increase of urban population, various types of domestic sewage are also increasing.

Wastewater treatment is a very important infrastructure in modern cities, playing a crucial role in protecting the water environment.

Today, let's take a look at the various workflows for treating sewage and witness the miraculous process of sewage turning into clean water in seconds!

1. Preprocessing

Pre treatment, also known as primary treatment, refers to the process of physical changes, mainly through equipment and facilities such as grids and sedimentation tanks, to remove garbage and sediment from sewage.

The incoming sewage enters the collection well, where several machines resembling harvesters are covered in grids and "thorns". Below are deep wells filled with dark sewage and a lot of garbage.

By using coarse and fine grids, the garbage and sediment in the sewage are basically removed, which is the first step in turning sewage into clean water.

2. Sewage enters the sedimentation tank

Remove larger particulate matter here.

3. Wastewater enters the oxidation ditch

This is the main process flow of sewage treatment, also known as secondary treatment, which involves biological and chemical changes. It mainly relies on various forms of biochemical tanks and sedimentation tanks to decompose organic matter in sewage into non-toxic and harmless clean water, nitrogen, and carbon dioxide through the decomposition of microorganisms under oxygen conditions.

Q: The turbid water next to the oxidation ditch keeps bubbling and churning, as if boiling. What's going on?

According to the introduction, "This is a biological oxidation tank that relies on microorganisms to further treat sewage. There is oxygen in the oxidation ditch, which makes the sewage boil and bubble. We use oxygen to reproduce bacteria, decompose organic matter in the sewage, and achieve purification

4. MBR membrane treatment

Next is the final stage of water purification - MBR membrane treatment, also known as deep treatment. This is a set of equipment composed of pipes and pipelines, with no special appearance, but Yan Bin told reporters that its mystery lies inside.

According to the introduction, this is a filtering device with very small gaps, only 0.04 microns. Only water molecules can pass through, and bacteria such as E. coli are completely blocked. After passing through it, the sewage becomes clear water.

At the main drainage outlet, the staff took out a measuring cup of treated water and compared it with the water in the initial collection tank. The viscous sewage, which had a strong odor and was filled with dirt, was transformed into water without any impurities after a series of treatments.

After treatment, the effluent meets the Grade A standard and is directly discharged into the Changliu River. The first level A standard means that the public can directly use this water to irrigate farmland, clean roads, and irrigate gardens and greenery.

To ensure that the drainage meets the standard, the online monitoring system located in the small house next to the main drainage outlet has played a significant role. Three machines, namely the total phosphorus online monitor, COD online monitor, and ammonia nitrogen online monitor, are arranged in sequence.

Optimizing water quality and focusing on the qualified rate of effluent are crucial to the ecological environment construction of Qingbaijiang District and the necessary path for environmental protection and remediation. We all have the responsibility to protect the ecological environment like we protect our eyes and treat it like we treat life.

This article is compiled by aquaculture wastewater equipment and does not represent the views of this website.