Table 4.

Costs, benefits, and feasibility estimations for struvite chemical precipitation, utilisation of saline water and sand as auto-nucleation media in combination with chemical precipitation and Ostara controlled struvite recovery reactor.

Mean (€ year/L)
Chemical precipitation of struvite
General WWTP operation and maintenance cost including chemical requirements.	43,365,650
Chemical cost requirements.	20,643,939
Water sale.	12,484,533
Struvite sale.	6,812,500
Savings regarding struvite precipitation.	83,367
Environmental benefits.	71,215,150
Chemical precipitation in combination with saline water and sand usage
General WWTP operation and maintenance.	39,462,741.2
Struvite sale.	6,812,500
Water sale.	12,484,533
Savings regarding struvite precipitation.	83,367
Environmental benefits.	>71,215,150
Ostara crystallization reactor
General WWTP operation and maintenance cost.	22,721,711
Reactor operational and maintenance cost.	574,000
Investment cost	10,558,090
Water sale.	12,484,533
Struvite sale.	6,812,500
Sludge disposal savings	273,020
Savings regarding struvite precipitation.	83,367
Saving in comparison with chemical precipitation of struvite	38,591,450
Environmental benefits	824,981,760,00