Evaluation of waste materials and their heavy metal contents in the waste paper processing plant

摘要

Wastes leaving a waste paper decolorization plant were given:a water and material mass balance were given.A qualitative and quantitative characteristics;heavy metal contents were specified at crucial spots,they were helpful for optimization of concentration and dehydration operations of waste sediments and developing ways to utilize them.The heavy metals in hygiene-grade papers prepared from decolorized waste paper were much below the permissible levels.