Nonactivated and Activated Biochar Derived from Bananas as Alternative Cathode Catalyst in Microbial Fuel Cells

Table 2

The elements of biochars at different treatments.

Sample	Thermotreatment temperature (°C)	Chemical activation	C (%)	N (%)	H (%)
Biochar-550	550	NO	82.09	2.81	1.35
Biochar-900	550	NO	84.74	3.34	2.46
Biochar-act550	900	Yes	85.89	2.86	1.17
Biochar-act900	900	Yes	85.97	3.57	1.34