Recovering ammonium and struvite fertilisers from digested sludge dewatering liquors

@inproceedings{Evans2007RecoveringAA,
  title={Recovering ammonium and struvite fertilisers from digested sludge dewatering liquors},
  author={Trent D. Evans},
  year={2007}
}
When sludge dewatering liquors are returned to the head of a wastewater treatment works they can contribute 20% of the total loading of nitrogen and of phosphorus. The loads can be even greater if the works is a regional sludge treatment centre with large quantities of sludges imported from other works. The solids contribution from dewatering liquors is trivial but the N and P loads can be both expensive and, if secondary treatment capacity is limited, decisive in selecting treatment strategies… CONTINUE READING