Inland Empire Paper Company - Environment


Learn More About IEP and the Environment

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  • News & Topics

    Inland Empire Paper Co. (IEP) has and continues to be proactive in the research and implementation of state-of-the-art technologies to enhance the mill’s performance and efficiency, as well as to improve the environmental quality for both it’s employees and the surrounding community. The company has an excellent history of compliance and is well within the limits established by its operating permits. The following environmental projects represent our ongoing proactive efforts:

    Moving Bed Biofilm Reactor (MBBR)

    In 2006, Inland Empire Paper Company completed pilot-scale testing of Moving Bed Biofilm Reactor (MBBR) technology as a proactive effort in improving the performance of its wastewater treatment system. MBBR technology uses a fixed film growth of biomass on plastic carrier media to promote high-rate treatment of BOD. To further substantiate this performance, Inland Empire Paper Company is planning on conducting a larger scale trial beginning in spring, 2007. This trial will provide IEP with the performance data necessary to evaluate this technology for potential future full-scale implementation.

    Tertiary Treatment

    In response to Washington State Department of Ecology’s proposed Dissolved Oxygen Total Maximum Daily Load (TMDL) for the Spokane River, Inland Empire Paper Company has purchased a 1.0 million gallon per day Siemens Trident HS tertiary treatment system. This system will initially be used for water reclamation to further study its performance as a tertiary treatment system for meeting the stringent phosphorus limits proposed by the TMDL. This water reclamation system, scheduled for operation in the spring of 2007, will reduce the treated water discharge to the Spokane River.

    Odor Control

    Although Inland Empire Paper Company does not generate the typical tell-tale “paper mill smell” associated with Kraft and Tissue type mills, we are aware that there are intermittent odors that are emitted from the mill. The primary source of these occasional odors originates from the wastewater treatment system and from the sludge that is generated by the recycling process. The continuous re-use of mill wastewater, resulting from our efforts to reduce and conserve fresh water usage, has resulted in an unanticipated odor generation side affect from the wastewater treatment plant.

    Inland Empire Paper Company remains committed to resolving these occasional sources of odor. Several projects are currently being implemented, including containment of the sludge produced by the wastewater treatment process. We are also in the process of identifying and quantifying all odor emission sources. Once these sources have been identified, a project will be implemented to collect and treat these sources to reduce odor emissions.


    Learn More

    Sept. 13, 2012
    IEP Installs New Algae-Based Water Treatment Technology: A Biological, Chemical-Free Process