Method for simultaneous elimination of orthophosphate and ammonium using electrolytic process

摘要

The present invention provides a method for the treatment of nitrogen-rich effluent and production of struvite comprising introducing the effluent in an electrolytic system and performing a first electrolytic treatment to the effluent in a first electrolytic reactor in order to organic matter that impact on nucleation of struvite, followed by a second electrolytic treatment in a second electrolytic reactor, thereby injecting Mg ions which react with NH4+ and orthophosphates from the effluent to form a struvite precipitate.

主权项

1. A method for simultaneous elimination of orthophosphate and ammonium from an effluent and enabling the production of struvite, wherein the effluent is a wastewater from industrial source, a wastewater from agricultural source or manure, the method comprising the steps of:
performing a first electrolytic treatment to said effluent in a first electrolytic reactor, the first electrolytic reactor comprising at least one cathode and at least one anode and being adapted to perform the first electrolytic treatment, thereby eliminating organic matter and calcium present in the effluent that impact on nucleation of struvite; separating a solid fraction from the effluent, performing a second electrolytic treatment to said effluent in a second electrolytic reactor, the second electrolytic reactor comprising at least one cathode and at least one magnesium anode and being adapted to perform the second electrolytic treatment, for producing Mg2+ ions which react with NH4+ and orthophosphates from said effluent to form a struvite precipitate; and eliminating the struvite precipitate from the effluent.