Table 1.

Integration of Microbial Electrolysis Cell with other technologies for energy production

S. No	Integration Type	Type of Electrode	Applied Energy [Voltage/ Current)	Type	Hydrogen	Current or Power Density	Remarks	References
	1. Microbial Electrolysis Cell-Anaerobic Digestion coupled	Anode: Carbon felt Cathode: stainless-steel	0 mV	Double chamber	0.42 ± 0.05 m3 CH4/m3 /d	2.01 ± 0.63 A/m2	AD-MEC loop system was used	48
	2. Microbial Electrolysis Cell-Anaerobic Digestion coupled	Anode: Carbon brush Cathode: Ti/RuO2	0.0–0.8 V	Single chamber	CH4 at 0.4 V	Steady increase in current with applied voltage	To update CH4, AD-MEC was combined.	50
	3. Microbial Electrolysis Cell with Hydrogen Bioreactor [HBR]	Anode: Graphite plate Cathode: Graphite plate	0.6 V	Single chamber	0.53 mmol/h	N/A	At 0.6 V, HBR+MEC produced the best results.	93
	4. Thermoelectric micro converter-Microbial Electrolysis Cell coupled system	Anode: Plain CF Cathode: Carbon paper with Platinum.	0.17 to 0.83 V	Double chamber	0.16 m3 H2/m3 /d	0.28 to 1.10 A/m2	Thermoelectric micro-converter as power source	57
	5. Dark fermentation and Microbial Fuel Cell–Microbial Electrolysis Cell coupled system	Anode: Carbon brush Cathode: Platinum coated carbon cloth	0.33 to 0.47 V	Single chamber	0.48 m3 H2/m3 /d	52 A/m3 [MEC]	Combine MFC and forest organics in a stack.	58