Modern technology of treatment and disposal of chromium- and sulfide-bearing wastes

[摘要] There were discovered the main sources of chromium- and sulfide-bearing sludges as well as their influence on a man and the environment. Requirements to the environmental compliance of leather industry have grown all over the world. There arises a need for creating new resource-saving technological schemes of leather industry chromium- and sulfide-bearing wastes treatment and disposal in order to return the valuable components into production. The obtained experimental results allowed to make a conclusion that for transforming into a concentrate any chromium- and sulfide-bearing sludges can be appropriate in the natural condition, after drying, after freezing and after preliminary processing by flocculants and freezing. The presented technology of chromium- and sulfide-bearing sludges neutralization and disposal will allow to change over to the almost non-waste leather-making what complies with the modern requirements of environmental protection.

[发布机构] Department of Town Planning, Engineering Systems and Networks, Institute of Architecture and Construction, South Ural State University, Lenin Avenue, 76, Chelyabinsk; 454080, Russia^1

[学科分类] 土木及结构工程学

[关键词] Environmental compliance;Leather industries;Modern technologies;Natural conditions;Preliminary processing;Technological scheme;Treatment and disposal;Valuable component