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Based on a complete set of wastewater treatment and resource utilization technologies in the photovoltaic industry
Solar cell high-fluorine wastewater treatment, recovery of fluorine, and double reduction of chemical sludge.
Type
Process technology
Tags
Prevention and control of water pollution sources
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Applicable industry
Water conservancy, environment and public facilities management
Applications
Industrial wastewater treatment
Key innovations
This technological innovation lies in its full-process differentiated treatment and resource utilization of high-fluorine wastewater, efficient recovery of fluoride, significantly reducing the amount of chemicals and sludge, improving treatment stability, and has multiple patents.
Potential economic benefits
This technology significantly reduces the amount of wastewater treatment chemicals added by more than 90%, significantly reducing operating costs. The recovered calcium fluoride is of high purity and can be sold as chemical raw materials to increase profits. Sludge emissions are expected to be reduced by nearly 50%, effectively reducing sludge disposal costs.
Potential climate benefits
This technology reduces carbon emissions from the production of related chemicals and sludge disposal by reducing the amount of wastewater treatment chemicals and sludge production. The recycling of fluorine resources reduces the energy consumption for the mining and processing of primary fluorine resources and achieves indirect carbon reduction.
Solution supplier
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Beijing Guohuan Tsinghua Environmental Engineering Institute
Beijing Guohuan Tsinghua Environmental Engineering Institute
Provide leading environmental engineering design, consulting and research, committed to pollution prevention and sustainable development.
Solution details

In response to the problems existing in the treatment of industrial wastewater with high fluorine content in the solar cell industry, a complete set of wastewater treatment and resource utilization technologies have been researched and developed. By analyzing the water quality and quantity of different drainage points in typical production processes, the emission points and discharge laws of pollutants in solar cell production were studied and identified, and a source separation plan for high-fluorine-containing wastewater was proposed, which effectively reduced the dosage of chemicals for wastewater treatment., improve the stability of terminal sewage treatment operation. The wastewater fluorine resource process package and wastewater stable compliance treatment technology are mainly used at the front end of the fluorine-containing wastewater treatment system. The wastewater is recycled for fluorine resources, and the effluent is discharged into the terminal wastewater treatment system, and discharged to meet the standards after treatment. This process has been demonstrated in Dongfang Electric Maiji and has also been promoted and applied in Hainan Yingli. A total of 3 patents have been applied for this technology, including 1 international patent and 2 invention patents have been obtained. Through this process, high-fluorine wastewater is treated, and the fluorine recovery rate in wastewater reaches more than 60%. The purity of the obtained calcium fluoride product reaches more than 97%, meeting the fluorine chemical industry standards. It is expected to reduce the amount of terminal wastewater treatment chemicals by more than 90%. It is expected to reduce the amount of sludge discharged from terminal wastewater treatment by nearly 50%. Reduce fluoride ion emissions by more than 150 kg/MW; reduce sludge emissions by nearly 2 t/MW (based on 70% water content) to reduce environmental hazards caused by leaching of fluorine-containing sludge; reduce fluoride ion content in the inlet of the terminal wastewater treatment system, reduce water quality fluctuations, improve the stability of the terminal wastewater treatment system, and reduce environmental risks.


Last updated
13:52:37, Nov 04, 2025
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