Liquid purification or separation – Processes – Treatment by living organism
Patent
1988-06-23
1989-06-13
Therkorn, Ernest G.
Liquid purification or separation
Processes
Treatment by living organism
210605, 210611, 210631, 210750, 210912, C02F 330
Patent
active
048390526
ABSTRACT:
The invention provides a process for the treatment of water containing dissolved calcium ions and dissolved sulphate ions. The water is passed at a pH of 5-8,5 through an anaerobic biological sulphate removal stage wherein microorganisms utilize sulphate ions in the water to produce hydrogen sulphide. The water from the sulphate removal stage is then passed through a hydrogen sulphide removal stage where hydrogen sulphide is removed therefrom. Water form the hydrogen sulphide removal stage is passed through an aerobic biological treatment stage wherein microorganisms cause at least partial biodegradation of any organic material remaining in the water and wherein calcium carbonate is precipitated. The invention also provides a biological water treatment installation which comprises an enclosed reservoir means which provides an anaerobic stage and which feeds into a hydrogen sulphide removal stge, which feeds into a reservoir means having oxygenating means therein for oxygenating water therein and providing an aerobic stage.
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Council for Scientific and Industrial Research
Meller Michael N.
Therkorn Ernest G.
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