Improved Waste Utilization Reduces Environmental Footprint
Diverting waste from landfills and finding strategies for utilization have increasingly become important environmental and social considerations in kraft mill operations. Kraft pulp mills produce on average about 100 kg of solid waste (dry) per ton of pulp produced. The most significant types of mill waste are sludge from wastewater treatment, ash from biomass combustion and dregs, grits and lime mud from the causticizing plant. Almost half of mill waste is currently disposed of in landfills, which highlights the need and potential for waste recycling and utilization.
While much of the sludge generated in pulp and paper mills can be used for incineration, or various forms of land application such as land spreading, composting, or waste covers, most of the alkaline wastes (ash and causticizing residues) are currently landfilled. These wastes can be suitable for soil application in agriculture and forestry as well as for the manufacture of building materials, road and earth construction, and in the neutralization of acidic effluents or acid leachate. Identifying better waste utilization methods can help reduce a mill’s environmental footprint and also improve the mill operations’ economic efficiency.
This fall, attendees of TAPPI’s Pulping, Engineering, Environmental, Recycling and Sustainability (PEERS) Conference will have the opportunity to learn about various waste utilization methods currently applied by pulp and paper mills as Torsten Meyer from the University of Toronto presents “Pulping and Paper Mill Waste Utilization.” His presentation is part of PEERS’ Environmental track.
PEERS 2019, October 27-30, 2019 in St. Louis, MO, is considered the premier technical event focusing on the latest advances in technology, as well as fundamental process knowledge and control issues mills face each day. Its comprehensive technical program includes eight program tracks emphasizing new methods and best practices to help mills optimize operations and reach their sustainability goals. View the PEERS 2019 Technical Program.
PEERS’ Environmental track addresses new developments in performance, water and wastewater advancements, and regulatory development. Track presentations include:
• Simultaneous Precipitation in an ECF Kraft Pulp Mill: Long-Term Experiences
• Water Cost Tool
• Energy Grid Interactions in Canadian Forest Sector Value Chains
• Pulp and Paper Mill Waste Utilization
• Environmental Regulatory Development Panel
PEERS is co-located International Bioenergy & Bioproducts Conference (IBBC) and the 12th Research Forum on Recycling. Attendees can attend all three events for only one registration fee.
Register today! Mills get a special discount.