Table 1 Treatment methods of small intestine with different washing process after pig slaughter

Treatment	Description	Washing ratio
C	Tap water washing 1 time (3 min)	Washing solution (5 liters) : pig small intestine (1 kg)
T1	0.5% (v/v) acetic acid washing (2 min)+tap water washing 1 time (1 min)
T2	1% acetic acid washing (2 min)+tap water washing 1 time (1 min)
T3	2% acetic acid washing (2 min)+tap water washing 1 time (1 min)