The effects of salinity on the treatment of tannery effluents and sludges

摘要

Within the biological treatment of tannery effluent, the general approach uses aerobic bacteria maintained in suspension to digest nutrients within the effluent. Soluble effluent components that have a high oxygen demand, are converted into a fine suspension of bacterial clusters and these are removed as solids. However, systems that rely on anaerobic bacterial action can also be usefully employed to remove components that otherwise would produce a high oxygen demand in the effluent.