Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Table 2

Elemental composition of rice husk biochar from EDS.

Samples of biochar prepared at	Elements composition (%wt)
	C	O	Si	K	P	Ca
400°C	74.62	22.02	2.94	0.42	—	—
500°C	77.44	16.54	5.39	0.63	—	—
600°C	78.41	13.71	6.95	0.92	—	—
After use	62.20	18.90	16.92	—	1.11	0.86