| Title |
Treatment of ammonium rich wastewater using natural zeolite as a medium in SBBR |
| Authors |
손대희 ( Son Dae Hui ) ; 정윤철 ( Jeong Yun Cheol ) ; 유명진 ( Yu Myeong Jin ) |
| Keywords |
zeolite; modified zeo-SBBR; nitrification; denitrification; regeneration |
| Abstract |
Continuous experiments in laboratory scale SBBR(Sequencing batch biofilm reactor) with granular natural zeolites were conducted to investigate the effect of ammonium removal and regeneration by ion-exchange and nitrification. The proposed process used the ion exchange material as the media for the nitrifying and denitrifying biomass. The entire process was carried out in a single reactor. The SBBR type of three reactors were prepared for comparison of removal of nitrogen, organics and phosphorus. The first (modified Zeo-SBBR) and the second(Zeo-SBBR) reactors were filled with granular zeolite, and the third(A.C-SBBR) with granular activated carbon. Modified Zeo-SBBR and A.C.-SBBR were operated in new mode ; fill, mix, drain, backwash, and aeration, and Zeo-SBBR in conventional mode ; fill, mix aeration, backwash, and drain. The synthetic wastewater having 200㎎/L of NH₄^(+) was tested in this process. Results of this experiment were that modified zeo-SBBR showed the highest nitrogen removal efficiency. Total nitrogen removal efficiency showed 94%(modified zeo-SBBR), 75% (zeo-SBBR) and 79% (A.C-SBBR) respectively. In the case of modified zeo-SBBR, nitrogen removal was effectively enhanced by ion-exchange of the zeolite. And the zeolite saturated by ammonium was continuously regenerated by nitrification without a regeneration chemical such as NaCl. The results support that the proposed nitrogen removal process is very effective for treating ammonium bearing wastewater. |