Table 2.

Amino acid content in feather hydrolysate

Amino acid	Concentration (mg/L)
	Supernatant	Hydrolysate
asp	27.93 ± 1.57	130.80 ± 3.94
glu	122.86 ± 0.55	380.78 ± 15.42
ser	7.72 ± 0.89	40.28 ± 1.56
his	6.38 ± 1.21	76.58 ± 3.67
gly	8.91 ± 0.12	94.30 ± 6.19
thr	25.70 ± 2.44	136.36 ± 5.28
arg	23.44 ± 0.18	19.80 ± 0.31
ala	138.23 ± 4.36	247.44 ± 5.59
tyr	55.57 ± 1.38	301.76 ± 14.27
cys-s	23.34 ± 0.28	28.58 ± 0.59
val	531.75 ± 10.55	337.62 ± 16.20
met	204.99 ± 2.77	247.16 ± 4.63
phe	401.76 ± 8.54	577.54 ± 17.48
ile	45.25 ± 0.45	105.62 ± 7.19
leu	50.30 ± 2.11	220.06 ± 8.32
lys	154.67 ± 5.17	360.48 ± 14.29
Total	1828.79	3305.16

Supernatant means the fermentation supernatant; hydrolysate means the products from feather hydrolysis