It was necessary to study on the composition of total cyanide in the coking wastewater after biological treatment in order to meet the new discharge limits.
为满足日趋严格的排放标准要求，对焦化废水生化出水中总氰的构成进行分析是十分必要的。
Now common ways to enhance total cyanide removal ability of biological treatment systems are increasing the HRT and improving the solid-liquid mass transfer efficiency of reactors.
目前，提高生化除氰效率的主要途径是尽量延长水力停留时间和采用固液传质效率更高的反应器。
Further cyanide leaching tests for flotation tailings were done. 82.20% of the operating gold leaching rate achieved, resulting in the total gold recovery rate up to 96.37%.
进一步对浮选尾矿进行氰化浸出，可获得82.20%的作业金浸出率，从而使金的总回收率达到96.37%。
应用推荐