Increasing peptide yield of soybean meal solid-state fermentation of ultrasound-treated Bacillus amyloliquefaciens

Enhancing the growth of thermophilic Bacillus licheniformis YYC4 by low-intensity fixed-frequency continuous ultrasound

“…The results showed a gradual increase in the biomass with increasing ultrasonic power, and reached the maximum value of 36.89% at 120 W (equivalent to power density of 40 W/L), then decreased with further increase in power. A reduction in biomass was obtained at 180 W. This result is consistent with the finding of Wang et al [18] , who indicated that the power density of 40 W/L was suitable for treating Bacillus amyloliquefaciens cells. Also, Huang et al [7] showed that power density<160 W/L had positive effects on the growth of the probiotics in the process of seed culture, illustrating that microorganisms have different sensitivities to ultrasound treatment.…”

“…Ultrasound treated sample had a higher DPA content than that without ultrasound, indicating that ultrasound promoted spore germination of B. licheniformis YYC4. Similarly, Wang et al [18] found that the endospores germination rate of sonicated B. amyloliquefaciens was 67.33%, significantly higher than the control (with a 15.67% of germination rate).…”

A Novel Fermented Rapeseed Meal, Inoculated with Selected Protease-Assisting Screened B. subtilis YY-4 and L. plantarum 6026, Showed High Availability and Strong Antioxidant and Immunomodulation Potential Capacity

“…The concentration of glucosinolate was determined by the anthrone colorimetry [ 22 ]. The concentration of soluble peptides was determined by the Folin phenol method [ 23 ]. The lactic acid content was determined by gas chromatography [ 24 ].…”

Prospects and application of solid-state fermentation in animal feed production – a review

“…Several articles and books have discussed the importance of ultrasound in the food industry (Huang et al, 2019;Yunliang et al, 2022). Ultrasound technology has recently been applied in the process of SSF and has shown interesting results, such as increasing the peptide content (150.68 mg/g) and enzyme yield (protease=330 IU, α-amylase= 825 IU) of solid fermented products (Salim et al, 2019;Yucheng et al, 2021). Ultrasound technology (low-frequency ultrasound) has proven to have a positive effect on biological systems, such as (1) changing the cell membrane permeability and increasing cell growth rate; (2) changing the molecular conformation and amplifying metabolic processes; and (3) activation of intracellular signal transduction systems and variations to the secretion of metabolites inside the organism .…”