| Title |
Demonstration of ion exchange technology for phosphorus removal and recovery from municipal wastewater |
| ID_Doc |
27582 |
| Authors |
Guida, S; Rubertelli, G; Jefferson, B; Soares, A |
| Title |
Demonstration of ion exchange technology for phosphorus removal and recovery from municipal wastewater |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.cej.2021.129913 |
| Abstract |
Orthophosphate (PO4-P) removal and recovery from municipal wastewater were investigated in a 10 m(3)/day hybrid anion exchanger (HAIX) demonstration plant. To date, HAIX resins have been investigated for PO4-P removal at laboratory scale with promising results but there is a need to investigate the application of the technology at larger scale, over extended operation whilst establishing an efficient regenerant management solution. The HAIX removed an average of 6 mg PO4-P/L to > 0.3 mg PO4-P/L, within 430 bed volumes, with a capacity of 4.1 mg PO4-P/g resin. To manage the regenerant (NaOH 2%) efficiently, this was reused up to 8 times, reaching 785 mg PO4-P/L, but the adsorption capacity was compromised, and it decreased to 1.5 mg PO4-P/g resin. By adding calcium hydroxide to the saturated NaOH, 95% of the PO4-P was recovered as hydroxy-apatite, and at the same time the regeneration effectiveness was re-established, as < 0.3 mg PO4-P/L was reached again in the effluent. The treated NaOH was reused as regenerant solution, ensuring high effluent quality of < 0.2 mg PO4-P/L. This study confirmed the capability of HAIX technology to remove and recover PO4-P from wastewater offering a solution which ensures both a high effluent quality and a circular economy approach. |
| Author Keywords |
Phosphorus removal; Ion exchange; Regenerant management; Circular economy; Resource recovery |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000664199900003 |
| WoS Category |
Engineering, Environmental; Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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