Conventional versus Nonconventional Methods for Treatment and Removal of Cyanide and Heavy Metals from Process Waters in a Silicon-Manganese Smelter Operation

与SGS合作，弗莱明学院的水和废水技术促进中心（CAWT）将确定在标准氰化物破坏过程中形成的重金属络合物，并确定去除这些重金属络合物的最佳方案。硅锰冶炼厂焙烧矿石以生产锰铁产品。该工艺产生的废气含有氰化物、锌和铁，可使用洗涤器系统将其从气体中除去。然后处理该溶液以去除氰化物以及重金属，以满足环境水排放限制。目前的系统不能将氰化物和重金属降低到新环境标准所要求的低浓度。本提案旨在对氰化物和重金属进行权衡研究，并对常规单元操作（焦亚硫酸钠、臭氧、过氧化氢）和非常规单元操作（例如生物发电、紫外线）进行比较，研究结果将用于修改或构建一系列符合排放要求的单元操作。

In collaboration with SGS, Fleming College's Centre for Advancement of Water and Wastewater Technologies (CAWT) will determine the heavy metal complexes formed during standard cyanide destruction and determine the best options for the removal of these heavy metal complexes. A silicon-manganese smelter roasts ores to produce a ferro-manganese product. The off-gasses from this process contain cyanide, zinc and iron which are removed from the gases using a scrubber system. This solution is then treated to remove cyanide as well as heavy metals to meet the environmental water discharge limits. The present system does not reduce the cyanide and heavy metals to the low concentrations required by new environmental standards. This proposal is for a cyanide and heavy metals trade-off study with a comparison of the conventional (sodium metabisulphite, ozone, hydrogen peroxide) and nonconventional unit operations (e.g. biogeneration, UV light), the results of which will be used to modify or construct a series of unit operations that will meet the discharge requirements.