| 摘要 |
<p>A process for precipitating out heavy metals from sulphate-ion-containing wastewaters by treating the water with sulphate-reducing bacteria. These bacteria will reduce the sulphate ions to hydrogen sulphide, which itself will precipitate out the metal ions in the form of metal sulphides. According to the invention the bacteria are cultured in one or more bioreactor(s) in the presence of a nutrient solution and a portion of the wastewater and the aqueous solution resulting, which contains the hydrogen sulphide formed by the bacteria, together with the remaining main portion of the wastewater, is introduced into a precipitation reactor.</p> |
