Table 1.

Comparison of sweet and acid whey composition.

Composition	Acid whey	Sweet whey	Reference
Total solid, % wb	4.27–5.92	60.64 ± 1.15 g/L	(56, 119)
Minerals g/L	3.49–5.04	1.2	(22, 119)
Ca2+, wt, %	1.98 wt, % 1.91 ± 0.01b g/L	0.69 wt, % 0.29 ± 0.00 g/L	(22, 119)
Phosphate ions	0.8–0.92 g/L	0.34–0.4 g/L	(22, 119)
Total Proteins % wb	0.16–0.48 7.5 + 0.2 wt%	5.52 ± 0.47 g/L 9.2 + 0.3 wt%	(20, 22, 119)
Lactose % wt	67% Wt 2.1–3.5	72–73% wt 49.44 ± 0.55 g/L	(19, 20, 22)
Lactic acid	7.19–13.07 g/L 14.4 + 1.5 wt%	1.2 + 0.1 wt%	(22, 119)
pH	4.21–4.7	5.9–6.4	(19, 20, 22, 119)
COD mg/L	31.9–62.400	50–102 g/L	(19, 20)
BOD mg/L	32.7–50.5	35–60 g/L 35.000–55.000 mg l−1	(19, 20, 22)
Ash % wt	0.6–0.73% wt	0.5% wt 4.41 g/L	(22, 119)