How to treat laboratory wastewater and what are the treatment methods of laboratory wastewater?

For the treatment of laboratory wastewater, traditional treatment methods will have many drawbacks, such as manual acid-base neutralization, sedimentation tank sedimentation, chemical reaction, osmosis reverse osmosis, filtration, heavy metal capture and so on. The traditional treatment method is time-consuming and labor-intensive, and the wastewater contains a lot of toxic and harmful substances, if the treatment is not careful, it will cause great harm to the human body and even health, and it requires relevant technical experience, and there is no full understanding and practical experience of waste water and waste liquid, so it is best not to treat it privately.

For the treatment of laboratory wastewater, Eco suggests that we use special laboratory wastewater treatment equipment instead of manual automatic treatment, Eco brand wastewater treatment equipment contains a series of methods of traditional wastewater treatment, the machine runs automatically, without manual operation, the efficiency and quality of treatment will be greatly improved compared with manual treatment, and the operating cost is low, will not produce secondary pollution, energy saving and environmental protection.

For questions about laboratory wastewater treatment, please consult Eco.

...It's too broad. Chemistry is not a simple subject, and the experiment can not be done in a lifetime, and different wastewater has different treatment methods, such as acidic wastewater, which can be treated with alkaline neutralization to produce insoluble neutral precipitation.

The same goes for alkaline wastewater. Remember not to dispose of sewage indiscriminately. Exhaust gases should also be collected for later use or consumed.

Sewage treatment methods are broadly divided into three categories: physical, chemical, and biological.

Physical methods: air flotation, flocculation, ultrafiltration, adsorption, etc.

Chemical method: coagulation.

Biological method: activated sludge treatment, biofilm treatment, biochemical pond, ecological wetland, etc.

1. Sediment filtration method:

The purpose of the sediment filtration method is to remove suspended particulate matter or colloidal matter from the water source. These particulate matter if not.

If there is removal, it will cause damage to the dialysis water and other delicate filter membranes or even block the waterway. This is the oldest and easiest.

Therefore, this step is often used in the initial treatment of water purification, or if necessary, several more will be added to the pipeline.

filter to remove larger impurities.

2. Hard water softening method:

The softening of hard water requires the use of an ion exchange method, which uses a cation exchange resin to exchange sodium ions for calcium in hard water.

With magnesium ions,* this reduces the concentration of calcium and magnesium ions in the water source.

3. Activated carbon:

Activated carbon is made by dry distillation of wood, wood residues, fruit cores, coconut shells, coal or petroleum bottom residue and other substances at high temperatures.

After being made, it needs to be activated with hot air or water vapor. Its main function is to remove chlorine and chlorine, ammonia and other molecular weights.

Dissolved organic matter at 60 to 300 daltons.

Fourth, deionization method:

The purpose of the deionization method is to remove inorganic ions dissolved in water, and like hard water softeners, it also uses ion exchange trees.

The principle of lipids.

The CWL-M centrifugal extractor treats laboratory wastewater.

Is there a lot of water? Is what the laboratory does.

Shanghai Shangyu Environmental Protection Technology Co., Ltd. is a high-tech enterprise founded by a doctor from Shanghai Jiao Tong University. The R&D center and southern production base are located in Minfeng Science and Technology Innovation Park, No. 58 Xutang Road, Songjiang District, Shanghai. Shanghai Shangyu Shangyu focuses on the research and development, production and sales of laboratory comprehensive wastewater treatment equipment, laboratory comprehensive sewage treatment equipment, medical sewage treatment equipment, oral and dental outpatient sewage treatment equipment, laboratory pure water equipment, laboratory ultrapure water equipment, laboratory waste gas treatment device and other products.

Features::1. Adopt neutralization coagulation, natural sedimentation, fiber microfiltration, activated carbon adsorption and other technologies to treat inorganic pollutants in sewage;

2. It can realize all-weather automatic operation without special personnel on duty;

3. Use pH meter and imported metering pump to accurately control the dosing amount;

4. Easy operation, stable operation, long service life, low operation and maintenance costs;

5. It occupies a small area and can be placed indoors or outdoors according to different situations;

6. Tailor-made design and manufacturing can be carried out according to the different requirements of users.

There are not many manufacturers who really do laboratory wastewater treatment equipment, mainly Zhonghuan Qingyuan, Vaughn, Xiangshunyuan, etc., the others are basically looking for these three processing, these have their own advantages, the other ** low are just simple domestic sewage treatment, do wastewater or Zhonghuan Qingyuan professional, Vaughn is a company that started with pure water, so it is okay to use pure water technology to do wastewater, do low solubility, Xiangshunyuan mainly does waste storage cabinets, each has its own special session. You can go to the official website of each one to see, and other companies are basically looking for them to process or do simple sewage treatment, and the laboratory wastewater treatment basically does not meet the requirements.

First, the material of the equipment.

Depending on the quality of the wastewater influent, we should choose the right material.

1. Equipment containing acidic wastewater or low-concentration organic solvents, such as PPH, PE, U-PVC, etc., can be selected.

2. If you need to treat wastewater with high concentration of organic solvents, there are many types, and you can generally choose PVDF or PTTE material.

3. The material selection of other accessories of the laboratory wastewater treatment machine, for example, valves and sealing rings need to choose materials with good corrosion resistance, fluoroelastomer or EPDM should be selected in general occasions, and PVDF or PTTE materials should be selected for high-concentration wastewater.

Second, equipment performance.

1) Energy saving and environmental protection.

The selection of laboratory wastewater treatment machine needs to have the characteristics of high efficiency, energy saving, environmental protection and other characteristics to ensure long-term use, which can not only reduce wastewater treatment costs, reduce energy consumption, but also obtain higher economic benefits.

2) Mature technology.

The design of the laboratory wastewater treatment machine should meet the specifications, the treatment equipment is advanced, reliable, efficient and mature, and has a strong resistance to water quantity and water impact load, complete models and treatment capacity, etc., which can fully meet the needs of different wastewater treatment. At the same time, it can also ensure that the treated wastewater complies with national and local environmental protection policies and relevant laws, regulations, standards and norms.

(3) Extend the service life.

In order to ensure that the equipment can withstand use and extend its service life, the choice should focus on choosing durable wastewater treatment equipment from regular manufacturers to ensure that the number of maintenance is reduced, the equipment renewal cycle is extended, and the investment cost of the equipment can be greatly reduced to reduce the operating costs. (4) Security.

The safety of the equipment must be ensured during operation and use, and the safety verification of the equipment should be carried out before purchasing, and its safety index should be clarified through testing, and to ensure that the equipment will not produce secondary pollution such as exhaust gas and noise during operation, and the safety can only be introduced and used under the premise of safety standards, so as to control the occurrence of safety accidents.

5) Consistency.

According to the nature of the wastewater to be treated, the model, accessories and facilities should be selected as much as possible to avoid some small problems and delay the construction period of the project, and at the same time, it also brings convenience to equipment maintenance personnel and management personnel, and is more conducive to the sustainability of equipment operation.

How to choose laboratory sewage treatment equipment needs to be based on the laboratory project and the treatment of water quality, and the following three points need to be paid attention to when choosing:

1. Analysis of their own water quality treatment needs: including sewage water quality analysis, effluent water quality analysis after treatment, whether it is used again, equipment floor area, installation site confirmation, pipeline layout, etc., on the basis of careful analysis of the above points, in order to correctly select the appropriate sewage treatment equipment.

2. Analysis of the strength of manufacturers: there are many water treatment manufacturers now, many businesses do not have a fixed production base, and they need to consider before choosing: the actual plant area of the manufacturer, the number of companies, the technical team, the brand influence, the installation case, various qualification certifications, etc., and the choice of powerful manufacturers can ensure product quality and after-sales service.

3. Product analysis: the same water treatment capacity, will also be differentiated because of different manufacturers, first of all, we need to understand where the differentiation is, the selection of sewage treatment equipment needs to pay attention to the core components of the product, and do not need to choose cheap to poor manufacturers to affect the use of shoddy products.

Instructions for laboratory wastewater processes.

When the wastewater collection tank reaches a certain liquid level, the wastewater is lifted to the regulating tank with a lifting pump, the pH meter controls the alkali pump to work, the pH of the wastewater is adjusted to alkaline, and PAM and PAC are added to the wastewater to precipitate the inorganic and heavy metals in the water and then transported to the sludge drying tank through the diaphragm pump for concentration, and then handed over to a third-party company for treatment after collection.

After the wastewater is coagulated and flocculated and precipitated, the supernatant is collected into the clear water tank and H2SO4 is addedIn addition of hydrogen peroxide (H2O2) with ferric ions Fe2+. The mixed solution has strong oxidizing properties, which can oxidize many known organic compounds such as carboxylic acids, alcohols and esters to an inorganic state, and the oxidation effect is very obvious.

It is extremely oxidizing, and ordinary organic matter can be completely oxidized to an inorganic state. Then adjust the pH of the oxidized water to 9, and the organic matter in the water will precipitate. The sediment in the sedimentation tank is transported to the sludge drying tank by a pneumatic diaphragm pump.

After drying treatment, a third-party company is entrusted to deal with it. Ozone is added to the clear water tank, and then lifted to activated carbon adsorption and ultraviolet sterilization and disinfection through the filter pump, and then discharged into the municipal pipe network.

Advantages of laboratory wastewater treatment equipment.

1.The inorganic pollutants in wastewater are treated by neutralizing coagulation, flocculation, natural sedimentation, fine filtration, activated carbon adsorption and other technologies.

2.It can realize the automatic operation without special personnel on duty throughout the day.

3.The pH value and metering pump are used to accurately control the dosage of the drug.

4.It is easy to operate, stable in operation, long in service life, and low in operation and maintenance costs.

5.It occupies a small area and can be placed indoors and outdoors according to different situations.

6.It can be designed and manufactured according to customer requirements and operating capacity.

Application field: middle and higher education institutions: waste water generated by laboratories such as the School of Life Sciences, the School of Chemical Engineering, the School of Materials, the College, the College of Food, the School of Medicine, the College of Agriculture, etc.;

Scientific research institutes: laboratory wastewater generated by research institutes, research institutes, centers, inspection centers, etc.;

Center for Disease Control and Prevention: wastewater generated by physical and chemical testing, microbiology, PCR, P2, P3, P4 and other laboratories;

Animal husbandry and veterinary: wastewater generated by laboratories such as animal epidemic prevention and pathogenic microorganisms;

Inspection: wastewater generated by laboratories such as chemical laboratories and chambers;

Laboratory wastewater contains acids, alkalis, organic pollutants, heavy metal ions, pathogenic microorganisms, pH value varies greatly, and COD concentration is high, which is mainly divided into three categories:

Laboratory wastewater discharge standard: [GB8978-1996] "Comprehensive Sewage Discharge Standard";

The main detection indicators are: heavy metals, pH value, suspended solids, color, COD, Escherichia coli, etc.

Mature methods and equipment for laboratory wastewater treatment:

1. Heavy metal coagulation and co-precipitation process: remove heavy metals, suspended solids, and color;

2. PH automatic adjustment process: automatic pH value adjustment of acid and alkali wastewater;

3. Ozone oxidation disinfection process: organic wastewater degradation, removal of COD, killing of E. coli;

4. Chlorine dioxide should be added to medical wastewater as required;

5. Laboratory wastewater treatment and purification device: integrated combined process treatment, fully automatic operation.

Laboratory wastewater treatment can be treated using integrated laboratory wastewater treatment, and the specific installation method is as follows:

1.Before the installation of sewage treatment equipment in the university scientific research laboratory, it is necessary to do a good job of concrete floor work according to the installation plan, so that the average bearing pressure of the ground can reach 5t m2, and the installation can only be carried out after the maintenance period of the ground concrete foundation pouring is completed; It can be installed in the sewage treatment equipment of the university research laboratory.

2.Design the equipment pipeline connection and positioning, the sewage treatment equipment of the university scientific research laboratory must be carried out according to the instructions of the equipment weight, the installation order is carried out according to the installation drawings, the position of the equipment can not be misplaced, and the distance between the water tank and the equipment must be reasonable.

3.The connecting pipes are confined with rubber pads, and the water pipe connections are tightened with tools so that no liquid leakage occurs at the joints.

4.After the installation of the sewage treatment equipment in the university research laboratory, the equipment must be fastened with screws or other items between the equipment and the floor to ensure that the equipment will not move.

5.The equipment needs to be tested before it is officially used, and the operating parameters of the equipment are adjusted while testing.

How to use sewage treatment equipment

1.The sewage treatment plant is a highly automated equipment, and the operator does not need to operate it at every step. The design system of general sewage treatment equipment is divided into the main body of the reaction tank, the dosing system, the filtration system, the disinfection system, and the electronic control system.

2.The sewage treatment plant is equipped with an automatic LPC controller and a manual controller. Device managers can choose the appropriate operating system according to their own needs.

3.In all the systems, the dosing system is mainly divided into PAC dosing system, PAM dosing system, acid dosing system, and alkali dosing system.

The equipment management personnel need to select the agent for configuration according to the sewage situation. The ratio concentration is generally pac (3%-5%), pam (, through the metering pump to dosing, if the sewage situation changes, then the configuration ratio can be changed accordingly.

4.Dosing operation method: connect the dosing device, then check each flange interface and tighten it to avoid fluid leakage.

Then connect the power supply of the metering pump, open the junction box of the electric control cabinet, and connect the power cord of the metering pump to the corresponding terminal. Close the blowdown valve and pour the liquid medicine into the liquid medicine container. Open the dosing system valve and start the metering pump.

5.In addition to dosing, another thing to do frequently is the maintenance of equipment, which is a long-lasting and stable job that needs to be completed regularly and quantitatively. For specific maintenance methods, please refer to other articles on the official website of blue film water treatment.