Where does the domestic sewage go, and how is the domestic sewage in the city treated?

Domestic sewage. Basically, they are discharged into the surrounding rivers or the sea, but some of them are treated. Some are not processed.

Domestic sewage is generally collected and treated in sewage treatment plants before being discharged into rivers.

Domestic sewage in the city generally flows into the sewer, is treated by the sewage treatment plant, and then discharged into the natural waters. Rural sewage without domestic sewage is discharged casually and seeps directly into groundwater.

The domestic sewage of the community will enter the septic tank of the community, then enter the unified municipal sewage pipe network, and finally flow to the city's sewage treatment plant. After the sewage treatment process, after reaching the discharge standard, it is discharged into the river and river.

In the city, the sewage in daily life flows to the sewage treatment plant, where it is purified and then discharged.

Domestic sewage should have special treatment facilities, and then turn into reclaimed water, which can be used for greening.

Under normal circumstances, domestic sewage is collected through the underground pipe network and treated at the local sewage treatment plant before being discharged.

Domestic sewage is processed through the underground sewage pipe into the sewage treatment plant.

Every city will have a domestic sewage treatment plant, and most of the domestic sewage will be treated and discharged.

Go to the sewage tank for purification treatment. Recycling after scientific treatment.

Domestic sewage mainly includes domestic drainage such as bathing, washing, and kitchens. There are a variety of pollutants in these drains, and if they are discharged at will, the pollutants in the water will enter the air, soil, water and other environments, which will have an adverse impact on our production and life.

The main pollutants in domestic wastewater are organic matter, including carbohydrates, proteins and fats, which can be broken down by aerobic microorganisms and converted into carbon dioxide and water. The discharge of a large amount of organic matter into the water body will quickly deplete the dissolved oxygen in the water, making the water body black and smelly.

Therefore, the domestic sewage of every household needs to be collected through the city's perfect sewage pipes and sent to the sewage treatment plant, where it can be discharged into the natural water body after treatment. At present, the sewage treatment plant mainly uses biological methods to treat sewage, that is, under artificial conditions, various microbial communities in the sewage are continuously mixed and cultivated to form biological sludge, which has a large number of microorganisms, which specialize in pollutants as food to obtain energy and continue to grow, so that the sewage can be purified.

After the treatment of the sewage treatment plant, a large number of pollutants in the sewage are cleaned up, so that the sewage can be safely discharged without causing pollution to the environment.

Most people have the impression of "smelly" in urban sewage stations, especially in aeration tanks and sewage treatment plants, where the smell is very uncomfortable. With the progress of the process, the sewage treatment in the plant area has been fully enclosed, so the smell can not be smelled outside the plant area, but the situation in the plant is still difficult to describe, so the best treatment method is to concentrate the odor in their respective areas with pipelines, and carry out harmless treatment through filtration, purification and decomposition methods such as spray towers and urban sewage station deodorants, which can basically solve the phenomenon of odor emission inside and outside the plant. This practice not only reduces the wanton emission of harmful gases such as ammonia, hydrogen sulfide, methyl mercaptan and sulfur dioxide, but also protects the health of workers.

From the perspective of economy and deodorization efficiency, the use of spray tower and town sewage station deodorant is the most suitable and effective solution, because the spray tower is an indispensable process equipment in all waste gas industry plants, without which the waste gas can not be collected and processed in a unified way from all directions, and because this step greatly reduces the problem of odor overflow and cost, the odor problem can be completely solved by adding plant deodorant to the spray tower end. The ports of aerobic ponds and anaerobic pools can also be added with plant deodorants according to the actual situation of the site.

Generally, urban sewage can be treated with demulsifier, which can quickly treat the emulsion in the sewage, and can make the suspended solids in the sewage flocculate, so that the sewage becomes clear.

The water from the city's sewers is finally treated at the first water treatment plant in the sewage section.

The domestic sewage of modern urban residents is converging to the sewage treatment center through the sewer pipe network, and is treated by clarification (sedimentation), filtration, disinfection and sterilization, etc., and then discharged or used as a secondary water source (reclaimed water) after meeting the national sewage discharge standards, such as greening, irrigation, aquaculture, etc. There are also some cities where domestic sewage is directly discharged, which has a great impact on environmental protection and society, and the first department is taking various ways to actively govern it.

The pollution of surface water is obvious, but the pollution of groundwater is shocking. 70% of China's 1.3 billion people drink groundwater, and more than 400 of the more than 660 cities rely on groundwater as their drinking water source.

The places where domestic sewage is discharged are as follows:

1. Domestic sewage from industry and hospitals enters the sewage treatment plant through the sewage pipe, and is discharged into the river after being treated by the sewage treatment plant.

2. For urban domestic sewage, it is collected into the city's sewage treatment plant through the underground discharge pipeline, and then discharged into the river flowing through the city after treatment.

3. Rainwater can be discharged directly without treatment.

The process of applying for a pollutant discharge permit is as follows:

1. Enterprises and institutions should fill in the online declaration information and submit paper application materials for pollutant discharge permits.

2. After receiving the application materials, the competent department of environmental protection shall approve and propose amendments, and issue a pollutant discharge permit after the review is passed.

3. Enterprises and institutions shall supervise the environmental management of enterprises on their own and submit implementation reports on time. 4. The environmental protection department adopts unscheduled spot checks and other methods to supervise and enforce the law according to the evidence.

The method of renewal of the pollutant discharge permit upon expiration is as follows:

1. The application for renewal of the pollutant discharge permit shall be 30 days before the expiration of the time limit.

2. The renewal procedures generally require the annual environmental protection and pollution discharge report of the enterprise.

3. Submit an application. In short, industrial, hospital, and urban wastewater is generally discharged into sewage treatment plants and finally into rivers. Pollutant discharge requires a pollutant discharge permit, which needs to be filled in with the declaration information, and issued a pollutant discharge permit after the review is passed, and if it expires, the permit needs to be replaced or renewed in time.

There is a septic tank under every house in the city, and the excrement produced by people every day is discharged into the septic tank through pipes, and after a period of sedimentation and treatment, this excrement is divided into the residue of sewage sinking at the bottom.

The sewage is discharged through sewage pipes to sewage treatment plants for treatment, and the treated water can be used to irrigate crops, water flowers, or discharge into rivers, lakes and seas.

The sediment that settles at the bottom will be decomposed by microorganisms and bacteria, and the volume will be greatly reduced. What if there is too much accumulation and the septic tank is full, then a manure pumping truck is needed.