Enhancement of chromium removal and energy production simultaneously using iron scrap as anodic filling material with pyrite-based constructed wetland-microbial fuel cell

Abstract Iron scraps was used as the anodic filling material coupled with pyrite as a substrate in a constructed wetland-microbial fuel cell (IsAno-PS) to investigate the power production and treatment of simulated wastewater that contained chromium. During 76 days of operation, the IsAno-PS facilitated the removal of total chromium, ammonia nitrogen, total phosphorus and energy production because of the synergetic effect between pyrite and iron scraps (p