The residual CN content of the water is low enough for the water to be discharged as waste. Complexes formed between HCN and metals, e.g. Fe. V or Ni, in the water are eliminated. Sulphides are also oxidised, and the treated water is free from smell....
Hard to describe, but I suppose the closest would be that "wet clothes" smell you get when sweat drenched clothes are not dried properly and then worn around. It's most unpleasant. We’ve just always called it in my house the "backpacker" smell (or “rickshaw driver smell”; choose you...