As of the end of the reporting period, LONGi has

3
National green factory certifications
3
Provincial green factory certifications
4
Bases have passed the clean production audit
31
Bases operated by LONGi have been certified to the environmental management system ISO 14001.
100 %
Certified to the environmental management system ISO 14001
Environmental management

In 2023, LONGi launched specialized inspections and empowerment initiatives to bolster the implementation of environmental management systems and enhance overall environmental management skills. We conducted specialized managerial tasks to standardize environmental practices, creating assessment checklists based on policy requirements, and performed targeted inspections at all bases, promoting hazard rectification. We recognized four bases as “model bases” for excellence in environmental management. At the same time, systematic empowerment was provided to all sites through training and seminars. At the group level, 14 internal empowerment sessions were held with 1,554 participants; business units and centers conducted 163 hours of cascaded training with 17,523 person-times of participaticipation; on-site seminars established communication platforms that generated solutions for 27 existing challenging issues. Additionally, to drive the standardized management of “environmental investment” data, we refined the definitions of environmental investment categories, achieving one-click retrieval of environmental investment data.

14
At the group level, internal empowerment sessions
1,554
Participants
163 h
Cascaded training via business units and centers
17,523
Participants

LONGi’s main system documents on internal environmental management

  • Environmental Protection Control Procedure
  • Waste Gas Management Policies
  • Technical Guidelines on the Operation and Supervision of Waste Gas Treatment Facilities (New)
  • Rain and Wastewater Management Policies
  • Solid Waste Management Policies
  • Technical Guidelines on Hazardous Waste Management (New)
Waste gas management

The waste gas produced by LONGi mainly includes nitrogen oxides, sulfur oxides, particulate matter, etc. We formulated emission reduction management plans for different manufacturing processes and carried out inspections and emission reduction guidance in 31 operating bases during the reporting period to ensure the implementation of relevant standards.

In 2023, LONGi’s production bases proactively upgraded waste gas treatment facilities to improve treatment efficiency and reduce emissions of nitrogen oxides and volatile organic gases.

LONGi’s regular waste gas emission reduction measures in manufacturing processes
LONGi’s regular waste gas emission reduction measures in manufacturing processes

LONGi’s waste gas emission in 2023

858.12 Hundred million m³
Total waste gas emission
149.92 tonnes
Nitrogen oxide emission
59.44 tonnes
Sulfur oxide emission
278.43 tonnes
Particulate matter (PM) emission
33.81 tonnes
Fluoride emission
19.71 tonnes
Chlorine emission
15.73 tonnes
Ammonia emission
136.00 tonnes
Other
Wastewater management

LONGi’s industrial wastewater is mostly generated during processes such as silicon rod slicing, cell production, preparation of concentrated water, and ground cleaning. To mitigate water pressure and environmental impact, we have been improving the capacity of wastewater treatment. In 2023, we adopted measures such as coal mine drainage recycling and evaporation and filtration wastewater recycling, which further reduced production of wastewater discharge.

Case| LONGi implemented the wastewater treatment capacity improvement project

In 2023, several production bases of LONGi carried out wastewater discharge reduction projects. In doing so, LONGi ensured a more environmentally friendly and stable reclaimed water treatment system and reduced tap water consumption. In response to the increase in wastewater pollutants caused by greater production capacity, some of LONGi’s production bases in Yunnan, Ningxia, and Xi’an have upgraded the wastewater treatment system and installed the Fenton treatment system, effectively controlling the discharge of chemical oxygen demand (COD) in wastewater.

LONGi’s wastewater discharge in 2023

3,022 kt
Wastewater dischargesurface water
42,351 kt
Wastewater discharge
3,648 t
COD emission
72,252 kg
Ammonia nitrogen emission
12,018 kg
Total phosphorus emission
580,921 kg
Suspended solid emission
Solid waste management

LONGi has established a complete system for technical guidance and regular diagnosis and assessment to improve waste management ability. For the disposal of hazardous waste, we entrust third parties with business licenses of hazardous waste utilization or disposal and track the entire process to ensure the closed-loop management of hazardous waste. For non-hazardous waste treatment, we mainly adopt comprehensive utilization by selling, supplemented by disposal, to improve the recycling rate of non-hazardous waste.

In 2023, we carried out a special project to recycle solid waste and reduce emissions at the source. Specifically, we minimized solid waste generation by identifying dangerous characteristics and selling the recycled solid waste as by-products. As a result, the recycling rate of non-hazardous waste increased to 73.3%.