A Chinese team use processed bacterial cells on a steel mesh to separate oil and water. This environmentally friendly fabrication process is designed to minimize the ecological impact of treating polluted water.
Reference: Sai et al. Facile and Green Route to Fabricate Bacterial Cellulose
Membrane with Superwettability for Oil–Water Separation. Advanced Sustainable Systems (2020). DOI: 10.1002/adsu.202000042.