Treatment of bauxite residue
AssigneeThe University of Queensland
InventorsLongbin HUANG, Fang YOU
Life of this patent
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Abstract
A method for treating bauxite residue contained in a storage facility comprising adding a mixture containing (a) a source of organic carbon, (b) a source of phosphorous or a source of phosphate, (c) a source of calcium, and a source of sulphur or sulphate to the bauxite residue, to thereby promote growth of microbes well adapted to highly saline and alkaline habitat, or to promote growth of marine microbes, or to promote growth of tolerant and marine origin haloalkaliphilic bacteria, or to promote growth of haloalkaliphilic organotrophic bacteria, preferably of marine origin. The method may comprise adding plant material or mulch and superphosphate fertilisers to the bauxite residue.
Claims26
A method for treating bauxite residue contained in a storage facility comprising adding a mixture containing (a) a source of organic carbon, (b) a source of phosphorous or a source of phosphate and (c) a source of calcium, to the bauxite residue, wherein haloalkaliphilic bacteria are also present.
(canceled)
(canceled)
A method as claimed in 1 wherein the source of organic carbon comprises plant biomass residues or plant mulch:
- (a) having relatively high levels of total carbohydrates and an N:C ratio suitable for intensive organic acid production;
- or
- (b) having a carbon:nitrogen ratio no higher than 80:1, or from 10:1 to 60:1, or from 20:1 to 40:1.
(canceled)
A method as claimed in 1 wherein the source of organic carbon, such as plant litter or plant mulch, is added in an amount of from 10% to 60% volume/volume of the amount of bauxite residue to be treated.
(canceled)
(canceled)
A method for treating bauxite residue contained in a storage facility comprising adding a mixture containing (a) a source of organic carbon, (b) a source of phosphorous or a source of phosphate, (c) a source of calcium, and a source of sulphur or sulphate to the bauxite residue, to thereby promote growth of microbes well adapted to highly saline and alkaline habitat, or to promote growth of marine microbes, or to promote growth of tolerant and marine origin haloalkaliphilic bacteria, or to promote growth of haloalkaliphilic organotrophic bacteria, preferably of marine origin.
(canceled)
A soil amendment for amending bauxite residue in a storage facility, the soil amendment comprising a source of phosphorous or phosphate and a source of calcium, and haloalkaliphilic organotrophic bacteria.
Dependencies are inferred from the claim text.