I. Introduction. With the rapid development of the photovoltaic industry, the scale of the photovoltaic industrial park continues to expand, and the problem of wastewater treatment is becoming increasingly prominent. The wastewater of the photovoltaic industrial park contains a large number of pollutants such as salt, heavy metal ions and organic matter, which has caused great harm to the environment. Therefore, how to effectively treat the wastewater of photovoltaic industrial parks has become an urgent problem to be solved. This paper will summarize various ideas for wastewater treatment in photovoltaic industrial parks, in order to provide reference for practical projects.
2. Wastewater treatment ideas for photovoltaic industrial parks.
1.Physical treatment.
Physical treatment method refers to the treatment method that uses physical principles to remove pollutants such as suspended solids and oils in wastewater. Commonly used physical treatment methods include precipitation, filtration, adsorption, etc. The physical treatment method has the advantages of simple operation and low cost, but it is not effective in removing dissolved contaminants.
2.Chemical treatment.
Chemical treatment refers to the treatment method that uses chemical reactions to remove dissolved pollutants in wastewater. Commonly used chemical treatment methods include redox, neutralization, precipitation, etc. The chemical treatment method has the advantages of good treatment effect and removal of dissolved pollutants, but the cost is high and secondary pollution may occur.
3.Biochemical treatments.
Biochemical treatment refers to the treatment method that uses microbial metabolism to remove organic matter and nutrients in wastewater. Commonly used biochemical treatment methods include activated sludge method, biofilm method, etc. Biochemical treatment has the advantages of good treatment effect and low cost, but it requires good microbial culture conditions and is sensitive to water quality changes.
4.Advanced oxidation technology.
Advanced oxidation technology refers to the treatment method of completely oxidizing and decomposing organic matter in wastewater into harmless substances by means of strong oxidants or electrochemical reactions. Commonly used advanced oxidation technologies include fenton oxidation, ozone oxidation, electrochemical oxidation, etc. Advanced oxidation technology has the advantages of good treatment effect and wide range of application, but the cost is high and toxic and harmful substances may be generated.
5.Membrane separation technology.
Membrane separation technology refers to the treatment method of separating and purifying different components in wastewater by using the selective permeability of membranes. Commonly used membrane separation technologies include reverse osmosis, ultrafiltration, nanofiltration, etc. Membrane separation technology has the characteristics of good separation effect and useful substances, but the cost is high, and the membrane is easy to be polluted and blocked.
3. Selection of wastewater treatment ideas for photovoltaic industrial parks.
According to the characteristics and treatment requirements of wastewater in photovoltaic industrial parks, it is very important to choose the appropriate wastewater treatment ideas. According to the pollutant composition, concentration, discharge standard and other factors of wastewater, the appropriate combination of treatment processes should be selected to achieve the best treatment effect. At the same time, attention should be paid to reducing treatment costs, reducing secondary pollution to the environment, and realizing the unity of economic and environmental benefits.
4. Conclusions and prospects.
Wastewater treatment in photovoltaic industrial parks is an urgent problem to be solved, which requires us to continue to explore and practice. For different types of wastewater, appropriate treatment ideas should be selected to achieve the best treatment effect. At the same time, technological innovation and research and development should be strengthened, treatment costs should be reduced, treatment efficiency should be improved, and a strong guarantee should be provided for the sustainable development of the photovoltaic industry. In the future, the wastewater treatment of the photovoltaic industrial park will develop in a more environmentally friendly, efficient and economical direction, and make greater contributions to the construction of a beautiful China.