Feammox, i.e., anaerobic ammonium oxidation coupled with ferric iron (Fe(III)) reduction, has been considered as a promising option for autotrophic nitrogen removal in wastewater with low carbon/nitrogen ratio. This study proposed a novel technology coupling Feammox and vivianite crystallization for the simultaneous removal of ammonium and phosphate in low-strength wastewater. The results showed that the Feammox process achiev...