Calcium phosphate from sewage sludge ash by "As2Phos" process (ID: 448)

Input material
Sewage sludge ash
Nutrient content info

N-P-K (%): 0-39-0

Status
Prior to market introduction
Application dose
depends on fertiliser type, soil, crop etc.
Type of farming
conventional
low input
Keywords
sewage sludge ash
clean phosphorus products
hydroxyapatite
Product description

EasyMining is focused on creating circular material flows from waste. Via the food cycle, phosphorus ends up in sewage sludge. The phosphorus content of ash from incinerated sewage sludge is high, and through the unique patented Ash2Phos process, it is possible to extract clean commercial phosphatesfrom the ash. Precipitated calcium phosphate (PCP) is a phosphorus-calcium rich product (Ca5(PO4)3OH, 17% P, 35% Ca) with a very low content of heavy metals (Cd < 0.1 mg/kg). The water solubility is low, but P is highly available as demonstrated by the high solubility in neutral ammonium citrate. It is already proven that phosphate is slowly released, the fertilizing efficiency is therefore high. It can be applied as such on the field (as root placed fertilizer or spread as granules with common equipment), or transformed to other phosphate fertilizers (MCP, DCP, MAP, DAP, etc). In addition, PCP can also be used for animal feed, compound feed and mineral feed. In 2023, 13,000 t/a PCP (from 30,000 t ash) will be produced. The price is matter of market and negotiation.

Linked technology: Technology for P recovery as calcium-phosphate starting from sewage sludge ashes with "Ash2Phos" process (ID 317)

Basic information

Vendor:
Country:
Sweden
Product main category:
Struvite and other P-product
Product subcategory:
Precipitated Calcium Phosphate

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