Total and leachable heavy metal concentrations in green liquor dregs from a causticizing process at a pulp mill

摘要

In the European Union (EU), the properties of solid wastes, especially when they are utilized or taken to a landfill, have to be known. Criteria and procedures for acceptance of waste at landfills are set out in the European Council decision document 2003/33/EC on the landfill of waste. According to EU Landfill Directive 1999/3 I/EC, the waste acceptance criteria impose requirements on waste classification and quality control. The European Council Directive 1999/3 I/EC classifies all waste into one of three classes: hazardous waste, non-hazardous waste, and inert waste. The leached amounts of Se (0.3 mg/kg; d.w.) exceeded slightly the limit values for an inert waste landfill (i.e. 0.1 mg/kg; d.w.). Therefore, the green liquor dregs has to be deposited of in a non-hazardous waste landfill.