Related Experiment Videos
Phosphate recycling in the phosphorus industry
W J Schipper1, A Klapwijk, B Potjer
1Thermphos International BV, Vlissingen, The Netherlands.
Environmental Technology
|January 24, 2002
Summary
Phosphate recycling is feasible for white phosphorus production using dry, inorganic materials. Side stream recovery of calcium or aluminum phosphates offers a promising recycling avenue, though contaminants like copper and zinc remain a challenge.
Area of Science:
- Industrial Chemistry
- Environmental Science
- Materials Science
Background:
- Phosphate recycling is crucial for sustainable resource management.
- White phosphorus production has significant environmental implications.
- Valorization of waste streams for phosphorus recovery is gaining importance.
Purpose of the Study:
- To assess the feasibility of phosphate recycling in white phosphorus production.
- To identify suitable secondary raw materials for phosphorus recovery.
- To evaluate challenges and opportunities in phosphate recycling from various sources.
Main Methods:
- Analysis of different waste materials for phosphate content and contaminants.
- Evaluation of processing requirements for phosphate recovery.
- Assessment of side stream recovery of calcium and aluminum phosphates.
Main Results:
- Dry, inorganic materials low in iron, copper, and zinc are suitable for recycling.
- Sewage sludge ash shows potential if iron precipitation is avoided and calcium or aluminum is used.
- Manure ash and some industrial sources contain problematic levels of copper and zinc.
Conclusions:
- Phosphate recycling in white phosphorus production is feasible with careful material selection.
- Side stream recovery of calcium or aluminum phosphates presents a viable and attractive option.
- Contaminant levels (Cu, Zn) in waste streams require careful management for successful recycling.