Each Lonza manufacturing site maintains a
waste-disposal concept tailored to its waste streams for an efficient,
environmentally sound treatment and disposal of wastes. All sites are dedicated
to our waste reduction principles.
At some locations, e.g. Visp (CH), we operate our own waste and wastewater treatment. We carefully select our partners
for waste transportation and treatment based on performance and capabilities in
Environment, Health and Safety (EHS).
We ensure that the treatment and
disposal of all our waste materials is conducted according to international
standards and conforms to the local regulations. The system and performance of
waste management at our manufacturing sites is subject to regular audits.
We are committed to increase input
materials efficiency in our production processes, including whenever possible
reworking out-of-specification production. We strive to reduce effluents by
controlling and reducing water inputs. Locally, effluents are managed according
to their quantities and parameters as permitted by the local authorities.
Additionally, the energy from on-site
incineration of residues and waste gases, which we perform in Visp (CH),and Nansha (CN), is used for heat energy generation in order to conserve resources.
The waste intensity varies over the years,
mainly due to the fact that construction waste was not separated from
production waste before the year 2018. Construction and excavation activities
contributed to the peaks observed in most recent years. After having refined
the waste reporting guidelines, the company will report numbers for
production-related waste streams.
Lonza applies state-of-the-art technology for air emission control. The focus is on greenhouse gas emissions (CO2), and volatile organic compounds (VOC), as precursors to low atmospheric ozone. Other parameters monitored are nitrogen oxides, sulfur dioxide and particulate matter.
Parameters monitored for water pollution are total organic carbon (TOC) or chemical oxygen demand (COD), heavy metals, nitrogen and phosphorus. Depending on the site-specific processes and production, local requirements may also include other relevant parameters. Organic substances in effluent waters are measured as total organic carbon (TOC) in metric tons C, or chemical oxygen demand (COD) in metric tons O2. Heavy metals are presented as metric tons of the sum of Arsenic( As), Cadmium (Cd), Chromium (Cr), Copper (Cu), Lead (Pb), Mercury (Hg), Nickel (Ni) and Zinc (Zn). The main source of heavy metals is the usage of metal-containing catalysts. The eutrophying nitrogen (N) and phosphorous (P) containing compounds are measured in metric tons of N and metric tons of P, respectively.