Efficiency Determination and Mechanism Investigation of Autotrophic Denitrification Strain F1 to Promote Low-Carbon Development

Shewanella sp. strain F1, isolated from a lab-scale Fe(II)−dependent anaerobic denitrifying reactor, could reduce nitrate by oxidizing Fe(II). Its reduction rate and Fe(II) oxidation were 0.48 mg/(L·h) 5.05 at OD600 of 0.4786 with five-fold diluent. was popular in Fe(III) reduction. Fewer studies about its ability for are available. The low pH determined to be the switch F1 perform or oxidation. Even under pH, produced precipitated around cells iron encrustation. By observation morphologies two corresponding microbial mechanisms proposed. One named Cyc 2−based Fe(II)-dependent denitrification, which oxidized 2 outer cell membrane, on wall surface form tiled other 1−based existing precipitation towery encrustation, electron transported 1 periplasm. efficiency determination mechanism investigation will promote development autotrophic denitrification technology meet requirement low−carbon policy.