Table 2.

Properties of HBW substrates used in this study

Parameters	FSS	SS	HF	HFS
Moisture, MC (%)	95.3	95.2	95.1	94.7
Volatile solids, VS (%)	88.3	73.9	86.7	80.3
Fixed solids, FS (%)	11.7	26.1	13.3	19.7
C (%)	39.1	36.2	47.8	41.4
H (%)	6.2	5.1	6.6	5.8
N (%)	2.6	4.8	5.9	5.3
O (%)*	52.1	53.9	39.7	47.5
pH	4.8-5.0	5.8 - 6.0	7.0-7.5
Colour	Light brown	Black	Brownish
Smell	Mild	Foul	Foul

^*Estimated by difference