Struvite pyrolysate recycling combined with dry pyrolysis for ammonium removal from wastewater

► The dry pyrolysis with NaOH powder was investigated. ► The addition of an acidolysis step in the recycling process was investigated. ► The identities of MAP pyrolysate and its derivatives were experimentally validated. ► Seed crystal inoculation increased the rate of MAP crystallization by 20.86%.