1. Environmental Microbial Biofilms: Formation, characteristics, and biotechnological applications
2. Microbes-material interactions for direct inter-species electron transfer in anaerobic digestion
3. Electron transfer processes between microbes and electrodes in bioelectrochemical reactors
4. Wastewater granules: material-microbe formation and arrangement lead to blurry boundaries between aerobic and anaerobic metabolism and greenhouse gas emissions
5. Recent progress in antibacterial membranes for water treatment
B. Specific applications
6. Role of electrode engineering in microbial electrochemical technologies for bioelectricity and biohydrogen production
7. The development of cathode materials for boosting the CO2 conversion in microbial electrosynthesis cells
8. Spatial surface modification of cathode materials in microbial electrosynthesis of chemicals from carbon dioxide
9. Material-microbe interaction for solar power-driven biochemical synthesis
10. Methanogens-electrode interaction for methane production from carbon dioxide
11. Enhanced anaerobic digestion by hydrochar for efficient biogas production
12. Harnessing microbes-material interfaces for micropollutants removal from different media
13. Constructed wetlands for wastewater management
14. Chemical activation of biochar supported metal oxides for degradation of organic/inorganic and microbial contaminants
15. Pathogens electrogenicity as a tool for in-situ metabolic activity monitoring and drug assessment in biofilms
16. Biomass gasification and biological system for cleaning syngas from gasifiers
C. Technology scale-up and sustainability
17. Techno-economic implications and life cycle assessment of MFC and MEC
18. Moving bed biofilm bioreactor (MBBR) for wastewater treatment: Techno-economic/sustainability aspects and recent trends
19. Granular and moving bed bioreactor based wastewater treatment plant: An industrial perspective