Using Acid Mine Water for Removal of Phosphates from Sewage Effluent

An experiment was carried out at the Rondebult sewage purification works, regarding the use of underground mine water with a high iron content for phosphate removal from sewage effluents, to comply with a limit of 1 mg/ℓ soluble orthophosphates in the effluent. The theory of iron phosphate precipita...

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Bibliographic Details
Published in:Water science and technology 1983-01, Vol.15 (2), p.155-167
Main Authors: van der Merwe, P H, Maree, J P, Basson, N D
Format: Article
Language:English
Subjects:
Acid mine drainage
Acid mine water
Aluminium
Aluminum
Chemical precipitation
Dosage
Effluents
Iron
Iron phosphates
Mine drainage
Nitrification
Orthophosphates
Phosphates
Phosphorus removal
Plants (botany)
Purification
Removal
Salts
Sewage
Sewage effluents
Sewerage
Underground mines
Water pollution
Water purification
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Summary:An experiment was carried out at the Rondebult sewage purification works, regarding the use of underground mine water with a high iron content for phosphate removal from sewage effluents, to comply with a limit of 1 mg/ℓ soluble orthophosphates in the effluent. The theory of iron phosphate precipitation is discussed and reference made to phosphate removal plants in Wisconsin, U.S.A. Iron and aluminium salts did not seem to harm biological life on the filter. The dosing of mine drainage appeared to inhibit nitrification, reduce the pH increase through the filters, increase TDS by about 500 mg/ℓ, but an equivalent dosage of 20 mg/ℓ Fe maintained the final P below 1 mg/ℓ at a cost of 0,1 c/m3, one-tenth of the cost if chemicals had been used.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1983.0031