Co-removal of phosphorus and nitrogen with commercial 201 × 7 anion exchange resin during tertiary treatment of WWTP effluent and phosphate recovery

摘要: AbstractExcessive nitrogen and phosphorus discharge into natural water from wastewater treatment plants still have the potential of causing eutrophication. How to remove those excessive in an appropriate way is welcome practice. This study co-removed nitrate via operation commercial 201 × 7 exchange resin column, recovered phosphate simultaneously. Experimental results demonstrated that adsorption -P onto satisfactorily fitted Freundlich isotherm, while -N followed Langmuir model, with a maximum capacity 12.47 mg/g for 107.59 mg/g -N, respectively. Up 92% 90% secondary effluent were by column under optimal flow rate 50 BV/h. The exhausted could be regenerated 5% NaCl within 1 h at 15 BV/h. Moreover, this regeneration would guarantee are lower than breakthrough points even when 1175 BV wa...