What to do with the sewage in the factory?

Step 1: Factory sewage slag separation.

Industrial sewage generally contains a small amount of solid pollutants, even if the production process does not contain solid impurities, there may be operators dropped protective materials and tools dropped into the sewage (such as masks, gloves, plastic bags, and sediment and leaves that may fall in the pipes, etc.), which are intercepted by the slag barrier to prevent blocking the subsequent treatment pools and equipment.

Step 2: Sewage separator and regulating tank treatment in the factory.

The sewage discharged from factories is generally discharged intermittently, some are discharged according to production shifts, but some factories discharge a large amount of sewage in a few hours or even a few minutes; Therefore, it is necessary to design a reasonable regulating tank according to the discharge law of sewage to cope with the irregular discharge of sewage; This is a prerequisite for the normal treatment of factory wastewater.

Step 3: Neutralization and treatment of factory wastewater.

Most of the wastewater discharged from the factory has a fluctuating pH value, containing various acids and alkalis. Even if no acid or alkali is added to the production workshop, the hydrolysis of the wastewater itself during the discharge process will lead to a decrease in the pH value of the wastewater; This often affects the dosing and biochemical treatment effects of sewage stations. Therefore, in order to ensure the stable operation of the factory sewage treatment system, it is recommended that a complete automatic neutralization system should be built when the factory treats sewage.

Step 4: Flocculation reaction precipitation or air flotation treatment of factory wastewater.

The pollutants discharged by the factory generally contain granular solids, colloids, heavy metal substances, dissolved pollutants, etc., among which the first three pollutants can be removed by dosing flocculation, and the flocculation dosing method is generally effective and effective (the disadvantage is that there is solid waste generated); For small and medium-sized plants, this method is recommended to further reduce the concentration of contaminants in the wastewater.

It is recommended to separate the flocculent pollutants produced by the flocculation reaction from the water by sedimentation or air flotation process.

Step 5: Biochemical reaction treatment of factory wastewater.

After removing various solids and colloids in wastewater through the above steps, most of the remaining pollutants are dissolved organic pollutants, and the dissolved organic pollutants can be decomposed into methane, carbon dioxide and other gases by biochemical process, and separated and overflowed from the water to be removed, so as to achieve the standard discharge of sewage.

Step 6: Advanced treatment of factory wastewater.

After the factory sewage is treated by the above several steps, the wastewater that does not require high discharge standards can be discharged up to the standard; For places with high requirements, wastewater needs further advanced treatment before it can be discharged or utilized (reused), commonly used processes include catalytic oxidation sewage treatment process, chemical oxidation sewage treatment process, membrane filtration and membrane separation sewage treatment process, sewage disinfection treatment process, etc.; Specifically, the appropriate advanced treatment method should be selected according to the degree of sewage treatment of the factory.

It can be separated by chemical treatment: through the action of chemical reaction and mass transfer, the pollutants in the dissolved colloidal state in the wastewater can be separated and converted into harmless wastewater.

Hello, you can use a high concentration of DCW hypochlorous acid, and add a high concentration of DCW hypochlorous acid to the sewage, which can quickly decompose the organic matter in the sewage, completely kill various bacteria, viruses, fungi and other microorganisms in the sewage, and completely remove the parent of bacteria in the sewage system - biofilm, so as to ensure that the sewage meets the national discharge standards, and will not produce new harmful residues.

If there is a municipal pipe network near the plant, the domestic sewage can be directly discharged into the municipal pipe network after septic tank treatment. If not, you need to dispose of it yourself and discharge it up to the standard!

Method 1: If it is a project, the main discharge is domestic sewage, the production sewage is basically evaporated, the content of COD, BOD, phosphorus, organic matter and other harmful substances in domestic sewage is relatively high and can not be directly discharged, you can dig a large pit as a temporary discharge pool, the water can be evaporated while draining in it, and finally wait for the end of the project to remove the waste and debris in the pit with a car, so as not to pollute the environment, and finally backfill it. Because there is no sewage treatment plant, this is the only way.

Method 2: If the sewage treatment plant is not far away, you can connect a temporary sewage pipeline and use a pump to directly send it to the sewage treatment plant for treatment, of course, you need to pay for it, if the sewage treatment plant is five kilometers away, it is not very cost-effective.

You don't need to treat it yourself, you know, the treatment of domestic sewage needs to be done by a special qualified and performance enterprise, except for a special domestic sewage treatment enterprise, the domestic sewage of all enterprises can not be treated by yourself.

Domestic sewage can be directly discharged into the urban sewage pipe network, and there is no need to treat it yourself.

The septic tank is an anaerobic treatment, and the pipe outside the factory is connected to the municipal sewage pipe network, which is directly connected to the sewage plant.

Domestic sewage can be directly discharged into the pipe network, and industrial sewage can also be discharged into the pipe network after reaching the standard.

See the criteria for details.

Of course, as long as the sewage is to be discharged, it must be treated!!

There is a direct discharge of the external network There is no only way to build a septic tank After looking for a car to pump it away, use the car @ to scatter the silk for a long time to get the bus to Qi.

Pro, the domestic sewage in the plant area first collects the domestic sewage through the sewer pipeline to the sewage storage tank, and then discharges the domestic sewage stored to a certain water level to the filtration mixing reactor for mixing and filtration, and the filtered domestic sewage is discharged to the bioreactor for hydrolysis and degradation treatment in the domestic sewage, and the hydrolyzed and degraded domestic sewage flows into the sedimentation tank for clarification and filtration, and the clarified and filtered domestic sewage can be discharged into the drainage pipe, lake or river after disinfection by the ultraviolet disinfection tank. The present invention constructs a small domestic sewage treatment system by the nearby position of the living area, so that not only can reduce the intricacy of the length of the domestic sewage laying pipe and the sewage pipeline, is convenient for repair and maintenance, and saves money.

It is necessary to build an industrial sewage treatment plant separately according to the planning implementation area.

The actual sewage treatment plants in the ministry are basically industrial wastewater.

Don't worry about this problem, now there is a machine called mud dehydrator, which is specially used to treat sewage, which is purchased in Meibang Environmental Protection, the dehydration effect is particularly good, and it can be turned into clean water after sewage treatment, and then it will definitely not pollute the environment, and the inspection will meet the standards.

A few days ago, I read some reports, there are many factories indiscriminately discharge wastewater into remote areas, nearby residents found that the discharge place slowly emitted a foul smell, every time it passed, it will be foul smell, difficult to breathe, only to find that these are all toxic substances emitted by major factories. There are also Shanghai Jiading Black Wharf secretly dumping domestic garbage into the sea and so on.

The working principle and process flow of sewage treatment equipment.

The removal of organic pollutants and ammonia nitrogen in sewage treatment equipment mainly depends on the AO biological treatment process in the equipment.

Waste water - grid - primary sedimentation tank - anaerobic tank - aerobic tank - secondary sedimentation tank - effluent.

Generally, the sewage pool is covered with anti-hanging film to deodorize.

Features: 1. Corrosion resistance: The membrane material is made of fluorocarbon fiber membrane, which has strong corrosion resistance, and the service life is 15 years for the membrane part and 50 years for the steel structure part.

2. Self-cleaning: The membrane material has extremely high non-adhesiveness, and the surface is not only not easy to adhere to dirt and dust, but can be kept clean and new for a long time through the washing of rainwater.

3. Large span: due to the light weight of the membrane material and the high tensile strength, the membrane structure can fundamentally overcome the difficulties encountered by the traditional structure in the realization of large-span (no support in the middle) building, and is suitable for large-span pool body;

4. Quick installation: the steel structure and membrane are directly installed on the site after factory processing, which reduces the occupation of the site, especially the old pool renovation project can be hoisted as a whole without affecting the operation of the equipment inside the pool;

5. Good sealing: all membranes are hot-melt welded, and the "secondary node sealing" of on-site hot-melt welding is used between the membrane pieces installed on site not only to ensure the sealing of the cover body, but also to ensure the corrosion of the steel structure by internal corrosive gas;

6. Convenient maintenance: due to the requirements of the process, it is necessary to regularly repair and inspect the equipment, which can be solved by reserving the door (membrane structure sealed curtain door or plastic steel window) and passage on the side film;

7. Convenient pipeline docking: easy to seal and connect with the pipeline of field equipment: the membrane structure of all facades can be opened on site as needed, and the on-site hot melt welding can restore air tightness.

8. Beautiful shape: very modern architectural sense, elegant and beautiful shape; Good self-cleaning performance, because the surface of the membrane has a PVDF self-cleaning coating, it can effectively reduce the adhesion of dust on the surface of the membrane, and can be effectively cleaned through natural rainwater, and its anti-fouling ability is far greater than that of other traditional covering materials, which can keep it bright for a long time; Good optical properties.

It also depends on what kind of factory you have, which generally uses sewage treatment and chemical raw materials to filter, sediment, and sludge. Sewage treatment manufacturers will give you a set of plans for your reference.

Nowadays, membrane structures are used to cover the cesspools.