|
Membrane Water Treatment Volume 13, Number 1, January 2022 , pages 1-6 DOI: https://doi.org/10.12989/mwt.2022.13.1.001 |
||
|
Performance evaluation of nitrate removal in high TDS wet scrubber wastewater by ion exchange resin with dissolved air flotation (DAF) process |
||
Bongchul Kim, Inseol Yeo and Chan-gyu Park
|
||
| Abstract | ||
| The regulations of the International Maritime Organization (IMO) have been steadily strengthened in ship emissions. Accordingly, there is a growing need for development of related technologies for the removal of contaminants that may occur during the treatment of SOx and NOx using a wet scrubber. However, this system also leads to wastewater production when the exhaust gas is scrubbed. In this research, we evaluated the performance of an ion selective resin process in accordance with scrubber wastewater discharge regulations, specifically nitrate discharge, by the IMO. Accelerated real and synthetic wastewater of wet scrubbers, contained high amounts of TDS with high nitrate, is used as feed water in lab scale systems. Furthermore, a pilot scale dissolved air flotation (DAF) using microbubble generator with ion exchange resin process was combined and developed in order to apply for the treatment of wet scrubber wastewater. The results of the present study revealed that operating conditions, such as resin property, bed volume (BV), and inlet wastewater flow rate, significantly affect the removal performance. Finally, through a pilot test, DAF with ion exchange resin process showed a noticeable improvement of the nitrate removal rate compared to the single DAF process. | ||
| Key Words | ||
| dissolved air flotation (DAF); international maritime organization (IMO) regulation; ion exchange resin; nitrate removal; wet scrubber wastewater treatment | ||
| Address | ||
| Bongchul Kim, Inseol Yeo and Chan-gyu Park: Water Environment Center, Environmental Technology Division, Korea Testing Laboratory (KTL), 87, Disital-ro 26-gil, Guro-gu, Seoul, Republic of Korea | ||
