Figure 2 | Scientific Reports

Figure 2

From: High voltage generation from wastewater by microbial fuel cells equipped with a newly designed low voltage booster multiplier (LVBM)

Figure 2

Diagram of the newly designed low voltage booster multiplier (LVBM) system connected to a single air–cathode microbial fuel cell (MFC) fed with domestic wastewater as substrate. (A) Air–cathode MFC fed with domestic wastewater, the brown and violet arrows indicate the influent and effluent, respectively. (C1) is a polarized capacitor (10 V/4700 µF). (B) Self-oscillating low voltage booster electronic circuit connected to the air–cathode MFC, T is a toroid ferrite coil inductor with double windings of 20 Turns, (L1 and L2) are axial inductors (680 µH), Q is a superfast switch NPN transistor (STN851). (C) Half wave Cockcroft-Walton voltage multiplier circuit, C2 is a polarized capacitor (6 V/1500 µF), D is a diode rectifier 1N4001. (D) Storage unit circuit, C3 is an equivalent capacitor of 10 polarized capacitors (10 V/4700 µF) serially stacked. The blue arrows represent the current flow when Q is ON, and the red arrows represent the current flow when Q is OFF. The green dotted arrows represent the charge and discharge of capacitor C1.

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