Selection of the Strain Lactobacillus acidophilus ATCC 43121 and Its Application to Brewers’ Spent Grain Conversion into Lactic Acid

Table 1

Chemical composition (% w/w) of brewer’s spent grains in the original form and as a cellulose pulp recovered by acid-alkaline and aqueous ammonia soaking pretreatments.

Solid composition
	Cellulose	Hemicellulose	Lignin	Others (ash, protein, and extractives)
	% (w/w)	% (w/w)	% (w/w)	% (w/w)
Untreated BSG 1	14.42	34.21	3.93	47.43
Untreated BSG 2	27.50	28.80	12.80	30.9
AAT BSG 1	86.49	3.87	2.31	7.33
AAS BSG 2	43.20	38.85	4.83	13.12

BSG from the brewery Bier Hoff Curitiba-PR (Brazil).
BSG from the microbrewery Maneba (Striano, Naples, Italy).
BSG after acid-alkaline treatment (AAT).
BSG after the aqueous ammonia soaking (AAS) treatment.