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The microbial transformation of phosphogypsum in thermophilic anaeobic bacterial cultures

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Przytocka-Jusiak M., Kowalski W., Rzeczycka M., Mycielski R.

Biotechnologia

1995

issue 2

102-112

In thermophilic anaerobic bacterial cultures phosphogypsum is microbiologically transformed to H2S, SO4(2-), Ca(2+), phosphate and calcium carbonate.The maximal received process efficiency amount to approximately 97%.The postcultivation sediments contan similar amounts of calcium, more phosphorus, more ferrum and magnesum, and smalle amounts of sulfur (mg/g of deposit) than phosphogypsum.The sediments may be applied as an agricultural fertilizer or a source of rare earths ores.

Investigating the source of hydrogen sulphide in sediments of the Puck Bay in the vicinity of Hel port

100%

Bolalek J., Jankowska H., Leczynski L., Falkowska L.

The paper presents results of analytical investigation on possible sources of hydrogen sulphide occuring in seawater supplied to marine laboratories of the Marine Station of Gdansk University in Hel.Seawater is pumped to aquaria system from the Puck Bay.Hydrogen sulphide concentration in pumped water was about o.25 mmol/ml, while in sediments surrounding the water intake it reached 2.64 mmol/ml.It turned out that hydrogen sulphide was produced in sediments by sulphste reducing bacterai from anthropogenic wastes.

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1 Biotechnologia

1 Oceanological Studies

1 1995

1 1994

1 Bolalek J.

1 Falkowska L.

1 Jankowska H.

1 Kowalski W.

1 Leczynski L.

1 Mycielski R.

1 Przytocka-Jusiak M.

1 Rzeczycka M.

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The microbial transformation of phosphogypsum in thermophilic anaeobic bacterial cultures

Investigating the source of hydrogen sulphide in sediments of the Puck Bay in the vicinity of Hel port