Iron-mediated removal of ammonium from strong nitrogenous wastewater from food processing.
The combination of microbial reduction and further microbial oxidation of iron was applied to the treatment of food-processing wastewater and recovery of ammonium. Fe2+ ions were formed by iron-reducing bacteria under anaerobic conditions. Ammonium was recovered by co-precipitation with negatively charged iron hydroxides produced during oxidation of Fe2+ by iron-oxidizing bacteria under microaerophilic conditions. The value-added by-product of this process can be used as a slowly released ammonium fertilizer.
Ivanov
V
V
Division of Environmental and Water Resources Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Ave., Singapore 639798. cvivanov@ntu.edu.sg
Wang
J Y
JY
Stabnikova
O
O
Krasinko
V
V
Stabnikov
V
V
Tay
S T L
ST
Tay
J H
JH
D001419:Bacteria; D011232:Chemical Precipitation; D005308:Fertilizers; D019649:Food Industry; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D009584:Nitrogen / Q000378:metabolism*; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*
D005308:Fertilizers; D007220:Industrial Waste; D000644:Quaternary Ammonium Compounds; D007501:Iron; D009584:Nitrogen