Environmental work at Iggesund Mill - Holmen

Iggesund Mill is located just south of Hudiksvall on the Iggesundfjärden bay. The mill produces high quality solid bleached paperboard for consumer packaging and graphical printing. A few kilometres north of Hudiksvall lies Strömsbruk, where paperboard from both Iggesund Mill and Holmen's mill in Workington is laminated and plastic coated. Skärnäs Terminal belongs to Iggesund Mill and is located next to the mill.


Environmental activities in 2017

2017 saw Iggesund Mill continue with its focus on a biofuel-generated energy supply. Through a carefully considered operational strategy and active allocation of available biofuels, over 98 per cent of total steam production was derived from biofuels.

Fossil carbon dioxide emissions are at a low level, but have increased in recent years. This is principally due to the supply of tar oil, which is a biogenic fuel, having been limited, forcing the mill to use more heating oil. Once again in 2017, the P11 oil-fired boiler was run solely on EO3, to avoid the risk of increased dust emissions.

On six occasions in spring 2017, an environmental course was targeted specifically at operators on the production line. The purpose of the course was to show the important role everyone has to play regarding the mill's impact on the external environment.

In 2017, Iggesund Mill continued its work to reduce emissions to water. Optimisation of the chemical flotation plant resulted in more stable operation and the conditions were met for 2017, with the exception of one case where the condition for chlorate was exceeded.

In 2017, a project began to improve the efficiency of the external wastewater treatment plant. The activities carried out so far are:

  • Commenced dredging of the aerated basin (estimated to continue in 2017–2020)
  • Separation of non-contaminated water (primarily cooling and seal water) with a view to reducing the flow of wastewater to the external wastewater treatment plant by around 5 000 m3 per day.
  • Following several years of breaks in the wastewater tube that leads to the aerated basin, in early November around 400 m of the existing tube was replaced.
  • Re-routing of a waste pipe to the sedimentation ponds.

The limit values for dust in the new Ordinance 2013:252 on large combustion plants were exceeded for three days in January. The work carried out on the electric filter in 2016 has brought emissions below the limit value by a good margin.

Energy-saving measures carried out over the year included permanent closure of the post-screening on Line 3 and reduced max flow for electric filter SP5. In total, this represents an annual energy saving of more than 5 GWh per year.

Permits for operation

In July 2016, Iggesund Mill submitted an application for a new permit to increase production to 500 000 tonnes of pulp and 450 000 tonnes of paperboard. This permit also includes operations at Skärnäs Terminal. The application was split into two phases and on 23 February 2017 the company received a partial judgment amending the permit to allow production of 460 000 tonnes of pulp.

The coating and laminating plant at Strömsbruk has been classified as a 'C' plant with an obligation to notify its environmental activities to the authorities since 2007/2008.

Permits under the Environmental Code for the port operations at Skärnäs Terminal, Iggesund, were granted in 1999.

The company is covered by the rules on fossil carbon dioxide emissions trading. It holds a permit for carbon dioxide emissions and has been awarded emission allowances for the trading period 2013–2020.

Certified environmental and energy management systems

Iggesund Mill's environmental management system has been certified to ISO 14001 since 2001. The energy management system was certified in 2005, and this system was upgraded in line with ISO 50001 in 2011.

The company also has both FSC® (FSC-ID) and PEFCTM certification for the wood raw material.

The health and safety management system has been certified to OHSAS 18001 since 2016.

The production unit at Strömsbruk and Skärnäs Terminal are covered by all certifications.

Investments/environmental and energy measures

During the maintenance shutdown in early November, preparatory work was carried out for the new evaporation plant that was decided on in 2017. Work on building the new 'evaporation plant 5' will begin in 2018 and it will come on stream in the second quarter of 2019, bringing a steam saving of around 50 GWh per year.

During the shutdown approximately 400 metres of the wastewater tube to the aerated basin was replaced and remedial work was carried out at more than 90 points.

One activity involves separating out non-contaminated water (primarily cooling and seal water) with a view to reducing the flow of wastewater to the external wastewater treatment plant by around 5 000 m3 per day.

The permanent closure of the post-screening on Line 3 and the reduced max flow for electric filter SP5 have brought an annual energy saving of over 5 GWh per year.

Disruptions to production and complaints

Iggesund Mill is focused at all times on designing out risks that could cause environmental incidents. In 2017, incidents requiring reporting to the supervisory authority occurred on 18 occasions. The incidents concerned releases of untreated wastewater (3), leakage on the wastewater tube (5), spillage when handling liquids (3) and one case of exceeding the limit values for dust under Ordinance 2013:252 on large combustion plants.

The dust exceedance was reported and the case was submitted to the prosecutor, who then closed the preliminary investigation since there was no evidence to suggest that the exceedance had been deliberate or due to criminal negligence.

In November, the condition from the Land and Environment Court's judgment regarding chlorate was exceeded. This exceedance was associated with the disruptions to production that occurred as part of the maintenance shutdown that took place in early November.

Seven external complaints were received during the year. Two concerned odour and four related to noise, and the complainants were informed about the underlying causes and measures taken. As part of the mill's maintenance shutdown in early November, the authorities received complaints about soot/ash in the water in three locations 6–9 km north-east of the mill. An investigation was unable to either prove or disprove that the emissions related to the start-up of the mill. In its decision, the County Administration Board states that it cannot be established with any certainty that the emissions come from Iggesund Mill, despite the start-up of the mill and the wind blowing in the direction of the polluted locations. The long distance between the locations and Iggesund Mill would suggest that the pollutants did not come from the mill. The County Administration Board therefore decided that there were no grounds to take action against the mill and the case was closed.

Follow-up of environmental and energy targets in 2017

The aim is constantly to reduce environmental impact, with the vision of creating an operation without fossil carbon dioxide emissions.

Iggesund Mill monitors this via three Key Performance Indicators (KPIs).

Energy

  • Outcome, consumed steam and electricity compared with forecast.

Environment

  • Proportion of biofuel in steam production, target level 98.3 per cent.
  • Outcome for conditional parameters is to be lower than in the previous year.

Outcome

Monthly follow-up shows that the 2017 target was achieved.

Planned environmental and energy measures in 2018

Implement phase 2 of the project to dredge the aerated basin.

Increased aeration in the aerated basin through reinvestment/replacement/addition of aerators.

Environmental and energy targets 2018

We constantly strive to improve our energy efficiency and reduce our environmental impact, while also working towards a zero vision for emissions of fossil carbon dioxide.

Energy

  • Electricity and steam consumption per tonne of product. Reduction in average consumption compared with 2017, target level 1 per cent.

Environment

  • Proportion of biofuel in steam production, target level 98 per cent.
  • Environmental index – reduction in environmental impact on average compared with 2017, target level 4 per cent. This applies to emissions of suspended solids and TOC plus water flows from the external wastewater treatment plant. This environmental index also includes the amount of chemical sludge from the chemical flotation plant (treatment stage).

Holmen AB, P.O. Box 5407, SE-114 84 Stockholm, Sweden. 

Tel: +46 8 666 21 00  E-mail: info@holmen.com

  

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