seen for the treatment of waste water from cellulose paper and kartongindustrin, from organic, biological degradable sybstaner black

摘要

The waste water of a sulfite pulp mill containing lignin and lignin derivatives which are not bio-degradable is purified by contact with a fixed bed of granular, porous gamma -alumina having a particle size of 0.5-10 mm and a specific surface area of at least 140 m2/g.