. 2023 Feb 2;13(2):181. doi: 10.3390/membranes13020181
© 2023 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 2.
Different levels of wastewater treatment.