Erratum to: A novel solid state fermentation coupled with gas stripping enhancing the sweet sorghum stalk conversion performance for bioethanol

Erratum to: Biotechnology for Biofuels (2014) 7:53 DOI 10.1186/1754-6834-7-53

After publication, the authors noticed an accidental error existing in this article [1]. In Table 1, they mistakenly listed the Ethanol yield of sweet sorghum stem as “6.25 g ethanol/100 g drystalk”. This information should be corrected as “6.25 g ethanol/100 g fresh stalk” (Table 1). This change will in no manner affect the outcome/interpretation of the experiments as described in the original publication. The authors apologize for any inconvenience caused.

Table 1.

Summary of literature reports on solid state fermentation (SSF) of sweet sorghum stalk (SSS) for bioethanol production

Feedstock	Particle size	Moisture content (w/w) (%)	Fermentation temperature (°C)	Fermentation time (h)	Strain	Ethanol yield	Reference
Sweet sorghum stalk	2.0 cm long, 0.15 cm thickness	70	35	28	Saccharomyces cerevisiae	22.7 g ethanol/100 g SSS (DM)	This study
Sweet sorghum stem	1 to 2 mm in diameter, 3 to 50 mm in length	70	28	30	S. cerevisiae TSH1	6.25 g ethanol/100 g fresh stalk	Li et al. [23]
Sweet sorghum stalk	2 mm	75	42	60	Issatchenkia orientalis IPE 100	25 g ethanol/100 g dry stalk	Kwon et al. [24]
Dry sweet sorghum stalk	0.9 to 1.6 mm	76.5	35–40	30	Angel active dry yeast	Yethanol/sugar 0.2593	Shen and Liu [25]
Sweet sorghum stalk	1.5 mm	75	37	50	S. cerevisiae AF37X	7.9 g ethanol/100 g fresh stalk	Yu et al. [9]

DM, dry matter; SSF, solid state fermentation; SSS, sweet sorghum stalk