| 摘要 |
<p>The invention provides a process for the treatment of water containing dissolved sulphate, selenate, tellurate and/or nitrate anions, together with dissolved calcium cations. Water being treated is passed at a pH of 5,0 - 8,5 through an anaerobic biological water treatment stage wherein microorganisms utilize said anions and reduce their concentration in the water. The water from the anaerobic stage is then passed through a calcium carbonate precipitation stage where calcium carbonate is precipitated from the water at a pH of at least 7,0. Producer gas is fed through an anaerobic biological gas treatment stage wherein the proportion of hydrogen relative to carbon monoxide in the gas is increased and this gas is then fed into the anaerobic water treatment stage to provide a metabolizable energy source for the microorganisms in the anaerobic water treatment stage.</p> |
