A novel Electrolysis-integrated anammox system for intensified nitrogen removal and simultaneous phosphorus recovery as vivianite

•A novel Ele-anammox system was developed for nutrient-rich wastewater treatment.•Enhanced nitrate removal was obtained, reaching an average NRE of 90.69%.•Enriched Ca. Brocadia and denitrifiiers dominated in Ele-anammox system.•Efficient and stable phosphorus removal was achieved (PRE: 93.99% ∼ 95.02%).•High-quality phosphorus was recovered as vivianite from wastewater.