With the rapid development of biological laboratories and the continuous progress of technology, the problem of wastewater treatment in biological laboratories has also attracted more and more attention. Treating wastewater not only saves costs and reduces environmental pollution for laboratories, but also protects the health of employees and ensures the accuracy of experiments. However, when choosing the wrong wastewater treatment equipment, choosing the wrong equipment is not only ineffective, but may also increase the burden on the environment. Therefore, starting from the characteristics of laboratory wastewater, this paper puts forward the factors that need to be considered in the screening of wastewater treatment equipment, and lists several common treatment equipment.
1. Characteristics of laboratory wastewater
Biological laboratory wastewater usually contains high concentrations of organic matter, inorganic ions and trace elements, which is toxic and corrosive, and the pH value and temperature are also different from general wastewater. Therefore, the type of wastewater and treatment needs need to be considered when choosing treatment equipment.
2. Factors to be considered in the screening of wastewater treatment equipment
1. Wastewater characteristics: Different wastewater has different characteristics, and the selection of suitable equipment can better treat wastewater.
2. Treatment effect: The effect of wastewater treatment is one of the key factors to consider the selection of equipment, and it is necessary to select equipment with efficient treatment effect according to the characteristics of biological laboratory wastewater.
3. Maintenance: The maintenance and maintenance of wastewater treatment equipment is a periodic task, and the equipment needs to be selected according to the efficiency and service life of the equipment.
4. Operating costs: The operating costs of each type of equipment are different, and the operating costs of the equipment need to be comprehensively considered.
3. Common wastewater treatment equipment.
1. Biological treatment equipment
Biological treatment equipment is a kind of wastewater treatment equipment based on microbial metabolic activity, which can be divided into two types: active pool and biofilm reactor. Biological treatment equipment is common and effective, but requires specialized operation and maintenance personnel.
2. Chemical treatment equipment
Chemical treatment equipment is the use of chemical substances to treat the pollutants present in wastewater, including neutralization, precipitation, redox and other reactions. The wastewater treated by the chemical treatment equipment can meet the national discharge standard, which is convenient to use and relatively low in operating cost, but it will produce more carbon dioxide during the reduction reaction, which needs to be discharged and treated.
3. Physical processing equipment
Physical treatment equipment includes filtration, adsorption, ion exchange and other technologies to treat pollutants in wastewater through physical principles. Physical treatment equipment is suitable for treating trace organic matter and heavy metal ions in wastewater, but not for treating compounds such as nitrate and phosphate in wastewater.
4. Ultrafiltration treatment equipment
Ultrafiltration treatment equipment is a kind of physical filtration technology that uses polymer membrane to filter and remove suspended solids, colloidal particles, proteins and other substances in wastewater, and produce wastewater with high water quality. Ultrafiltration treatment equipment has good treatment effect and can efficiently treat biological laboratory wastewater, but the cost is high.
In short, the treatment of biological laboratory wastewater needs to be selected according to the characteristics of the wastewater, treatment needs, equipment maintenance and operation costs. By comprehensively evaluating the advantages and disadvantages of various wastewater treatment equipment and selecting the treatment method suitable for your own laboratory wastewater, you can effectively reduce the environmental pressure caused by wastewater pollution and reduce the cost of wastewater treatment, and improve the production efficiency and accuracy of the laboratory.