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Different air‐breathing single chamber MFC set‐up fed with human urine for electricity production: A) tetrahedron paper based MFC[45], b) fine fire clay‐based MFC54 and C) terracotta clay‐based MFC[55]. Figure A) adapted from Ref. [45]. Published by The Royal Society of Chemistry. CC BY 3.0. Figure B) adapted from Ref. [54], Elsevier, under licence CC BY 4.0. Figure C) adapted from Ref. [55], Wiley and Sons Inc., under licence CC BY 4.0.
