ENVR Seminar: Feasibility of Bauxite Residue in the Removal and Recovery of Phosphorus, Yongeng Wang, CEE PhD candidate
Bauxite residue is an industrial waste generated from the alumina refining industry with high alkalinity and salinity, raising great concerns of environmental pollution. With its iron oxide-rich mineralogy,
bauxite residue can form complexes with phosphorus (P), which is a nonrenewable resource for crop and food production. However, excess P, such as those in agricultural runoff and animal waste, can cause eutrophication. In this study, bauxite residue exhibited excellent capabilities to remove aqueous P at environmentally relevant concentrations in agricultural runoff. For P in animal wastes at higher levels, the removal and concentration of phosphorus with bauxite residue was shown to be a strategy for P recovery as a resource. The utility of bauxite residues was further demonstrated in the utilization of bauxite residues as an additive in anaerobic digestion, which is frequently implemented for the
stabilization of organic waste and the production of biogas as a renewable energy source. My work shows that bauxite residues could be readily neutralized by the buffering capacity of the digestate in the anaerobic digestion without negatively impacting process performance. More importantly, the addition of bauxite residue could enhance P availability in the digestate which is desirable for the land application of anaerobic digestate as a soil supplement. In summary, this work supports the feasibility of P removal and recovery using bauxite residue.
Yongfeng Wang is a Ph.D. candidate in the Department of Civil and Environmental Engineering. He earned his Bachelor of Science in Environmental Science in 2010. In 2013, he was granted his Master of
Science in Environmental Science at Nanjing University with research focused on the fate of nitrononylphenol in soil and sludge. After graduation, he continued as a postmaster researcher and focused on the synthesis of unique organic chemicals to study the fate of environmental pollutants. In August 2015, Yongfeng enrolled in the FEED program and started to pursue a Doctor of Philosophy degree in Environmental Engineering at the University of Tennessee, Knoxville. His research focused on pollution mitigation and resource recovery using industry wastes.
Thursday, November 29, 2018 at 3:40pm to 5:00pm
John D. Tickle Engineering Building, 410
851 Neyland Dr, Knoxville, TN 37996