Air emissions

Management approach

Material topic: Air emissions

[GRI 3-3]

Actual and potential negative and positive impacts


  • Further improvement and development of closed-loop processes and recovery technologies
  • Showing leadership in pulp and fiber production with low environmental and social impacts


Own activities:

  • Air emissions carry potential regulatory, technology, market and corporate reputational risks
  • Air emissions can affect the health of employees and community residents as well as the surrounding environment

Business relationships:

  •  Air emissions can affect the health of employees and community residents as well as the surrounding environment

Policies and commitments

  •  “Naturally positive” sustainability strategy with “Sustainable innovations” focus area
  • Sustainability targets for the Lenzing Group
  • Group Policy for Safety, Health and Environment
  • Lenzing Group ISO 14001:2015 certification
  • Group Environmental Standard
  • Global Code of Business Conduct
  • Global Supplier Code of Conduct
  • Higg FEM

Actions taken

  • LURA III (air cleaning system) started operations as part of viscose modal production at Lenzing
  • Lenzing contributing to leading multi-stakeholder initiatives (ZDHC, SAC, etc.)
  • Continuous improvement activities to further reduce air emissions
  • Environmental management system based on ISO 14001:2015 (including risk assessment and internal audits to ensure effectiveness of the measures implemented)
  • Regular Global QESH meetings with management review

Sustainability targets, measures and progress

For more information, please see the “Sustainability targets, measures and progress” chapter.


  • CEO
  • Site managers


  • Global QESH
  • Performance.Improvement.Technology

 [GRI 305-7; ESRS E2-4, E2-5]

Reduction of sulfur emissions

Sulfur and sulfur compounds are indispensable for the standard viscose fiber manufacturing process. Lenzing has dramatically reduced sulfur emissions over the decades by increasing cycles and recovery systems. Although all of the Lenzing Group’s viscose fiber production sites (Lenzing, Austria; Nanjing, China; and Purwakarta, Indonesia) are equipped with waste gas purification and recovery technologies, some carbon disulfide (CS2), hydrogen sulfide (H2S), and sulfur dioxide (SO2) is emitted from the process itself and from on-site energy production. The planned second carbon absorption plant (CAP) project in Indonesia is on schedule. It will be essential for reducing specific sulfur emissions by 50 percent by 2023 (sustainability target 1).

In 2022, the absolute and specific air emissions reduced slightly compared to 2021 due to lower production level. CS2 emissions have fallen at the Austrian site in Lenzing due to the new emission treatment system that went into operation at the beginning of 2021 (table “Absolute emissions to air”).

Lyocell fiber production generates only trace emissions since NMMO, an organic solvent, remains in the water/solvent cycle throughout the entire process and is recovered at a rate of more than 99.8 percent. For more information about important steps taken in 2022, please see the “Sustainability targets, measures and progress” chapter.

Absolute emissions to aira






Sulfur emissions (t) (CS2, H2S emissions expressed as sulfur)





SO2 emissions (t)





NOx emissions (t)b






Sulfur emissions were calculated using mass balance, and SO2 emissions are based on measurements.


NOx data is only available on Group level from 2019 onwards respectively for the Indonesian production facility since 2021.

Specific emissions to air Index in percentage based on kg/t, 2014 = 100 %






Sulfur emissions

100 %

60.90 %

73.80 %

67.10 %

SO2 emissions

100 %

60.30 %

65.90 %

67.40 %

For more information about other waste streams besides waste water and air emissions, please see the “Waste management” chapter.

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