造气含氰废水的生物治理

在塔式生物滤池生产性处理规模上考察了造气含氰废水在挂膜前后的处理效果。比较结果表明，未挂过氰化物的平均处理率仅为７９．２９％，挂膜后的处理率平均为９５．２６％，处理后的废水全部回用于生产，减少了氰化物的排放量，防止了造气废水对环境的污染。

Biological Treatment of Gas-making Wastewater Containing Cyanide

The treated result of gas-making cyanide containing wastewater before and after hanging membrance has been inspected on the treatment scale of biological filter column for manufacture. The result showed that average treating rate of cyanide was only 79.29% without hanging membrance, and 95.26% after hanging it, all the waste water treated was used in the process again, the discharge amount of cyanide has been reduced, the environmental pullution from gas-making wastewater being put to an end. By the assessment of application benefit, the close-circut circulation system of biological filter column in treating cyanide containing wastewater was running smoothly and obtained good effect, and has a rather good social, environmental and economic benefit.