Laboratory wastewater mainly comes from the laboratory of various scientific research units and scientific research and teaching laboratories of colleges and universities. Laboratory wastewater has its own special properties, low volume, strong intermittency, high hazards, and complex and variable composition.

According to the nature of the main pollutants contained in the wastewater, it can be divided into two categories of laboratory organic and inorganic wastewater. Inorganic wastewater mainly contains heavy metals, heavy metal complexes, acids and bases, cyanides, sulfides, halogen ions and other inorganic ions. Organic wastewater contains commonly used organic solvents, organic acids, ethers, PCBs, organic phosphorus compounds, phenols, petroleum, oils and fats. In comparison, organic wastewater has a wider range of pollution than inorganic wastewater, causing more serious harm. Different wastewaters have different pollutant compositions and different treatment methods and degrees. The treatment of laboratory wastewater is based on the principles of separate collection, on-site and timely in-situ treatment, simple operation, waste treatment and cost reduction.


At present, there are no reports at home and abroad that there are mature processes and methods that can comprehensively treat laboratory wastewater to standard discharge standards. The treatment of laboratory wastewater cannot be equated with the treatment of industrial wastewater, but a multi-unit treatment process system or targeted classification treatment is adopted to reduce the treatment difficulty as much as possible, so that the treatment cost is low and the operation is relatively simple. Laboratory organic wastewater treatment methods can draw on the treatment of other organic wastewater. Generally speaking, organic wastewater treatment technologies mainly include biological methods and physicochemical methods. For laboratory wastewater with high organic matter concentration, high toxicity, and unstable water quality, the biological treatment method is not good, and the physicochemical method shows obvious advantages in the treatment of such wastewater. The recovery of experimental drugs, the classification and disposal of laboratory waste and the recycling and reuse can not only reduce the pollution to the environment, but also reduce the waste of chemicals. For high-concentration laboratory organic wastewater, the organic solvents such as alcohols, esters, organic acids, ketones, and ethers are recycled and reused, and then treated by chemical methods. The organic wastewater with high concentration, high toxicity, and unrecoverable , The need for centralized incineration.