| 摘要 |
<p>An improved method for the destruction of cyanide in waste waters is provided, wherein cyanide is oxidized by hydrogen peroxide in the presence of copper as catalyst. The treatment is carried out in a suitable vessel under agitation to which hydrogen peroxide and copper sulphate are fed with the waste waters, and the waters from the vessel are discharged into a clarifier where sludge is formed at the bottom. This sludge is then recycled to the treatment vessel in lieu of at least part of the copper sulphate. The operation is carried out at the natural temperature of the waste waters, i.e. between about 0.degree.C and 20.degree.C.</p> |
