Table 2. Composition of Pot Ale from Malt Whisky Distillery Compared to Commercial Pot Ale Syrup (Spey Syrup, AB Agri Ltd., Peterborough, UK)^a.

component	pot aleb	Spey syrupc	Atlantic salmond	pigse
dry matter (% w/w)	5.1 (0.2)	42.0
crude protein, CP (% DM)	33.0 (1.1)	32.0
total P (g/kg)	13.4 (0.3)	2.14	6.0	0.6
Ca (g/kg)	1.3 (0.1)	1.5		0.9
Mg (g/kg)	6.2 (0.1)	6.0	0.5	0.04
K (g/kg)	23.1 (0.5)	2.2	7	0.3
Na (g/kg)	0.7 (0.0)	1.0	0.6	0.2
Cu (mg/kg)	101.4 (45)	97.4	3	4.8
Fe (mg/kg)	37.0 (10.3)	nr	60	77.8
Mn (mg/kg)	13.6 (2.3)	35.7	15	3.0
Zn (mg/kg)	24.6 (2.8)	22.6	50	77.8
alanine	3.6 (0.2)
arginine	2.3 (0.6)		3.7	2.7
aspartic acid	6.1 (1.2)
glutamic acid	7.3 (0.3)
glycine	3.2 (0.0)
histidine	3.5 (0.9)	3.23	1.8	2.1
isoleucine	2.8 (0.4)		1.8	3.2
leucine	4.2 (0.6)		3.2	6.1
lysine	4.1 (0.6)	6.47	4.1	6.0
methionine	0.9 (0.1)	1.06	2.3	1.7
phenylalanine	2.4 (0.4)		2.8	3.6
proline	7.3 (0.9)
serine	3.1 (0.4)
threonine	3.1 (0.6)	5.61	0.5	3.9
tyrosine	1.5 (0.5)
tryptophan			0.5	1.0
valine	5 (0.3)		3.0	3.9

^aData is expressed on a dry matter basis with amino acid concentrations expressed as the percentage of crude protein. The protein amino acid and mineral requirements of atlantic salmon and pigs are shown for comparison.

^bPot ale data calculated as mean of six different samples from a single distillery with SEM shown in brackets. For P, Na, Mg, K, and Na, the analysis mean of the three samples are reported, and for the amino acid analysis, two different samples were analyzed.

^cThe data for pot ale syrup was based on a commercial information for Spey syrup available from Trident, AB Agri Ltd.¹² Mineral concentrations were recalculated to be expressed on a dry matter basis.

^dData for grower Atlantic salmon from aquaculture feed and fertilizer resources information system.²⁶

^eData for pigs was calculated as a mean of data for categories between 5 and 100 kg of body weight.²⁷