| Title |
Towards the circular economy-Sustainable fouling mitigation strategies in ultrafiltration of secondary effluent |
| ID_Doc |
28940 |
| Authors |
Czuba, K; Pacyna-Iwanicka, K; Bastrzyk, A; Kabsch-Korbutowicz, M; Dawiec-Lisniewska, A; Chrobot, P; Shavandi, A; Podstawczyk, D |
| Title |
Towards the circular economy-Sustainable fouling mitigation strategies in ultrafiltration of secondary effluent |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.desal.2022.115731 |
| Abstract |
Membrane separation is an emerging technology for secondary effluent (SE) recycling as an alternative water source. However, SE contains secondary metabolites which form a film on membrane surfaces, leading to a decrease in hydraulic capacity. This is an extensive study of the effect of fouling on UF performance, with a detailed analysis of foulants composition and morphology, and the evaluation of the most effective - either physical or chemical - UF membrane regeneration methods. The paper also investigates FNA (recycled from WWTPs) as an alternative acidic UF membrane cleaning agent. In the UF-DE mode, the most effective back-washing configuration was 1 s every 1 min, where relative membrane permeability decreased by 54% after 4-h, which indicated the presence of physically irreversible fouling after SE separation. An acidic-alkaline cleaning procedure in which the contribution of irreversible fouling was 13% resulted in a 100% efficiency of UF membrane regeneration. The results confirmed that recycled FNA is as efficient as pure reagent-nitric acid V and that the use of FNA can reduce the costs of chemical cleaning by 60%. To fit in with the idea of the circular economy, we proposed a new strategy of reusing spent acidic solutions as an alternative fertiliser. |
| Author Keywords |
Ultrafiltration; Secondary effluent; Fouling; Backwashing; Chemical cleaning |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000790970300003 |
| WoS Category |
Engineering, Chemical; Water Resources |
| Research Area |
Engineering; Water Resources |
| PDF |
https://dipot.ulb.ac.be/dspace/bitstream/2013/341757/4/1.pdf
|