1、 Classification of laboratory wastewater in the chemical industry
1. The main pollutants contained in laboratory wastewater in the chemical industry can be divided into three categories: inorganic, organic, and laboratory wastewater containing pathogenic microorganisms.
1.1 Laboratory inorganic wastewater mainly contains heavy metals (iron, cobalt, copper, silver, cadmium, lead, gallium, chromium, titanium, germanium, tin, aluminum, magnesium, nickel, zinc, silver, etc. in the waste liquid), arsenic (AsO32- and AsO43- in the waste liquid), cyanide (free cyanide, cyanide compounds or complex cyanide compounds in the waste liquid), mercury (Hg+, Hg2+in the waste liquid), fluorine (fluoric acid or fluoride in the waste liquid) and acid-base substances.
1.2 Organic wastewater from chemical industry laboratories contains commonly used organic solvents, organic acids, ethers, polychlorinated biphenyls, organic phosphorus compounds, phenols, petroleum, and oil substances.
1.3 The laboratory wastewater containing pathogenic microorganisms in the chemical industry mainly includes biological laboratory testing wastewater, dissection table flushing wastewater, biological culture medium, culture medium, and a small amount of experimental equipment flushing water, as well as animal room cage flushing wastewater.
2. Characteristics of Organic Wastewater Quality in Chemical Industry Laboratories
Laboratory organic wastewater often contains organic solvents, organic acids, ethers, polychlorinated biphenyls, organic phosphorus compounds, phenols, petroleum, and oily substances. Compared to inorganic wastewater, organic wastewater has a wider range of pollution and poses more serious hazards.

2、 Treatment methods for laboratory wastewater treatment equipment in the chemical industry
The laboratory organic wastewater treatment method can draw on the treatment of other organic wastewater. For laboratory wastewater with high organic concentration, strong toxicity, and unstable water quality and quantity, biological methods have poor treatment effects, while physicochemical methods show significant advantages in the treatment of such wastewater. The main methods for treating organic wastewater include physical and chemical treatment and biological treatment. The physical and chemical treatment method is the application of physical and chemical processes and principles to convert pollutants in wastewater into harmless substances, resulting in purification. Such as photochemical coagulation, oxidation adsorption, incineration, extraction, wet catalytic oxidation, electrochemical and membrane separation methods. The use of physical and chemical methods alone to treat high concentration organic wastewater is not only difficult and costly, but also the treatment effect is not good enough, and it is generally rarely used alone. Biological treatment is a method of using pollutants in biodegradable water as its own nutrition and energy, while purifying wastewater.

1. Ozone oxidation method for wastewater treatment equipment in chemical industry laboratories
Ozone has long been considered an effective oxidant and disinfectant, with fast reaction speed and no secondary pollution when used to treat organic wastewater. Organic compounds that are difficult to oxidize and degrade when acting alone can be oxidized.

2. Multiphase photocatalytic oxidation method for laboratory wastewater treatment equipment in the chemical industry
This method can remove many substances that are difficult to degrade or remove by other methods, such as chloroform, polychlorinated biphenyls, organic phosphorus compounds, polycyclic aromatic hydrocarbons, etc. It can also be used to remove most organic pollutants with a removal rate of up to 100%. It has outstanding advantages such as low energy consumption, easy operation, mild reaction conditions, and no secondary pollution.

3. Chemical industry laboratory wastewater treatment equipment Fenton reagent method
In the experiment of treating organic wastewater with Fenton reagent method, pH adjustment is not necessary. The optimal dosage of ferrous sulfate (FeSO4) and hydrogen peroxide (H2O2) is 115g and 410mL, respectively. When the reaction time is 30 minutes, a good treatment effect can be achieved, and the COD removal rate can reach over 75%. Hydroxyl radicals with strong oxidizing ability can be generated in the reaction, enabling the rapid degradation of organic matter in organic wastewater. This process has the advantages of simple equipment, mild reaction conditions, convenient operation, and high efficiency. It has great potential for application in the treatment of toxic, harmful, and difficult to biodegrade organic wastewater. However, this method has high treatment costs and is only suitable for the treatment of low concentration and small amounts of wastewater.

4. Wet oxidation technology for laboratory wastewater treatment equipment in the chemical industry

Wet oxidation, also known as wet combustion, is an effective method for treating high concentration organic wastewater. The basic principle is to introduce air under high temperature and pressure conditions to oxidize organic pollutants in sewage. It can be divided into wet air oxidation and wet air catalytic oxidation according to the presence or absence of catalysts in the treatment process. Wet air oxidation is mainly used to treat wastewater with concentrations that are too dilute for combustion treatment, too high for biodegradation treatment, or have significant toxicity. The wet air catalytic oxidation method involves adding suitable catalysts to the traditional wet oxidation treatment process to enable the oxidation reaction to be completed under milder conditions and in a shorter time.

5. Activated carbon adsorption method for laboratory wastewater treatment equipment in the chemical industry
Activated carbon adsorption method is commonly used to remove trace amounts of dissolved organic matter that cannot be removed by biological, physical, or chemical methods. Laboratory concentrated organic wastewater contains a large amount of experimental residue and waste solvents, mainly composed of hydrocarbons, aromatic compounds, and substances that can significantly reduce the surface free energy of the liquid surface. The wastewater has a high concentration, small amount, and is acidic, making it suitable for adsorption treatment with activated carbon. The treatment process involves first separating the organic phase from the wastewater through simple separation, and then using activated carbon for secondary adsorption. The COD removal rate can reach 93%, and activated carbon also adsorbs some inorganic heavy metal ions.