초록 ▼

Methods and compositions for wastewater treatment. The compositions comprise CaCO3, MgCO3, lanthanum chloride, or chitosan, and can be applied easily with conventional wastewater treatment processes and equipments. The methods and compositions of the present invention significantly improve treatment

Methods and compositions for wastewater treatment. The compositions comprise CaCO3, MgCO3, lanthanum chloride, or chitosan, and can be applied easily with conventional wastewater treatment processes and equipments. The methods and compositions of the present invention significantly improve treatment efficiency and reduce amount of required chemical additives.

대표청구항 ▼

I claim: 1. A composition for wastewater treatment, comprising a mixture of about 50-90% by weight calcium carbonate (CaCO3), 10-50% by weight magnesium carbonate (MgCO3), and water, chitosan and acetic acid, in amounts effective in achieving flocculation and removal of solids in said wastewater tr

I claim: 1. A composition for wastewater treatment, comprising a mixture of about 50-90% by weight calcium carbonate (CaCO3), 10-50% by weight magnesium carbonate (MgCO3), and water, chitosan and acetic acid, in amounts effective in achieving flocculation and removal of solids in said wastewater treatment. 2. The composition according to claim 1, wherein the composition comprises about 75% by weight CaCO3 and about 25% by weight MgCO3. 3. The composition according to claim 2, wherein the composition includes a mixture of fine powders of CaCO3 and MgCO3. 4. A composition according to claim 3 which comprises about 1-2 parts by weight chitosan, 1-2 parts by weight of CaCO3 and MgCO3, 1-2 parts by weight of glacial acetic acid, and 100 parts by weight of water. 5. A composition according to claim 4, which is prepared by dissolving 1-2 parts by weight of chitosan in 100 parts by weight of water, adding 1-2 parts by weight of CaCO3 and MgCO3, and adding 1-2 parts by weight of acetic acid. 6. The composition of claim 1, further comprising a lanthanum salt. 7. The composition of claim 6, wherein the lanthanum salt is lanthanum chloride. 8. The composition of claim 7, comprising about 36% to about 60% by weight of lanthanum chloride, and about 7% by weight of a composition comprising a mixture of fine powders of CaCO3 and MgCO3 at a ratio of about 75:25. 9. A composition prepared by adding lanthanum chloride to a mixing tank filled with water in volume of about 36% to about 60% by weight, along with about 7% by weight of CaCO3 and MgCO3, and mixing mixed for at least about 2 hours to achieve complete solubility and stabilization, wherein said composition is effective to achieve flocculation of phosphorus compounds in wastewater. 10. A composition for wastewater treatment, comprising a mixture of about 50-90% by weight calcium carbonate (CaCO3), 10-50% by weight magnesium carbonate (MgCO3) and a lanthanum salt, to achieve flocculation of phosphorus compounds in said wastewater treatment.