Abstract

The present invention is in the field of a method for recovery of phosphorous, in particular of phosphorous from a waste stream, and to a product obtained thereby. The product is preferably in a form wherein phosphorous can be released to e.g. the soil and plants at a desired amount per interval of time.

IPC Classes  ?

• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 101/10 - Inorganic compounds

Abstract

A method for recovery of phosphorous, in particular of phosphorous from a waste stream, and a product obtained thereby. The product is in a form wherein phosphorous can be released to, e.g., the soil and plants at a desired amount per interval of time.

IPC Classes  ?

• C05B 17/00 - Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/66 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
• C02F 3/28 - Anaerobic digestion processes
• C05B 15/00 - Organic phosphatic fertilisers
• C05F 11/00 - Other organic fertilisers
• C02F 1/00 - Treatment of water, waste water, or sewage
• C02F 1/38 - Treatment of water, waste water, or sewage by centrifugal separation
• C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
• C02F 5/06 - Softening water by precipitation of the hardness using calcium compounds
• C02F 11/127 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
• C02F 101/10 - Inorganic compounds
• C02F 103/20 - Nature of the water, waste water, sewage or sludge to be treated from animal husbandry

Abstract

The present invention is in the field of a (semi)continuous improved method for recovery of phosphorous, in particular of phosphorous from a waste stream, and to a product obtained thereby. The product is in a form wherein phosphorous can be released to e.g. the soil and plants at a desired amount per interval of time. The method of recovering phosphorous from an aqueous solution comprising the steps of providing the aqueous solution comprising soluble phosphorous, adding a composition, the composition comprising as mixed ingredients 5-40% CaO (w/w, relative to a total weight of the composition), 10-40% clay mineral, and 20-60% CaC03, wherein 0.5-2 mole CaO/mole soluble P is added, and recovering the phosphorous.

IPC Classes  ?

• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C01B 25/00 - PhosphorusCompounds thereof
• C01B 25/26 - Phosphates

Abstract

The present invention is in the field of a (semi)continuous improved method for recovery of phosphorous, in particular of phosphorous from a waste stream, and to a product obtained thereby. The product is in a form wherein phosphorous can be released to e.g. the soil and plants at a desired amount per interval of time. The method of recovering phosphorous from an aqueous solution comprising the steps of providing the aqueous solution comprising soluble phosphorous, adding a composition, the composition comprising as mixed ingredients 5-40% CaO (w/w, relative to a total weight of the composition), 10-40% clay mineral, and 20-60% CaC03, wherein 0.5-2 mole CaO/mole soluble P is added, and recovering the phosphorous.

IPC Classes  ?

• C02F 1/52 - Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
• C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
• C02F 11/12 - Treatment of sludgeDevices therefor by de-watering, drying or thickening
• C02F 101/10 - Inorganic compounds
• C02F 1/66 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
• C02F 3/28 - Anaerobic digestion processes
• C02F 5/06 - Softening water by precipitation of the hardness using calcium compounds
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption