Solid-state fermentation

About: Solid-state fermentation is a research topic. Over the lifetime, 5311 publications have been published within this topic receiving 113337 citations.

Fungal Invertase Expression in Solid-State Fermentation

Abstract: Summary In this study invertase activity expression in Aspergillus niger Aa-20 was evaluated under different concentrations of two substrates using solid-state fermentation (SSF) on polyurethane foam. Glucose was used as repressor and sucrose was the inducer. Invertase production increased when glucose was present in the medium (up to 100 g/L); however, higher concentration than this reduced the enzyme production. Induction-repression ratio obtained using any glucose concentration was at least 2.5 times higher than that under basal conditions (without inducer).

Solid-state fermentation with Aspergillus niger to enhance the phenolic contents and antioxidative activity of Mexican mango seed: A promising source of natural antioxidants

Abstract: This study examines changes in phenolic compounds and the antioxidant activity of Mexican mango seed in the bioprocess of solid-state fermentation (SSF) with the fungus Aspergillus niger GH1. The chemical composition and evaluation of mango seed as solid fermentation substrate support was also evaluated. Because of the chemical composition and the rapid growth of the fungus, mango seed is a suitable material to be used in SSF. The results showed that SSF of mango seed mobilized the polyphenolic compounds and improved the nutraceutical properties. The total phenol content in ethanol extract increased (p

Production of tannase by solid-state fermentation

Abstract: An attempt has been made to optimize the production of enzyme tannase by solid state fermentation (SSF) using the organism Rhizopus oryzae. The best favourable conditions for enzyme production include initial pH 5 with 4 days of incubation period at 40°C and 72% humidity, and 10 g wheat bran soaked in 2.5% tannic acid.

Optimization of Aspergillus niger rock phosphate solubilization in solid-state fermentation and use of the resulting product as a P fertilizer

Abstract: Summary A biotechnological strategy for the production of an alternative P fertilizer is described in this work. The fertilizer was produced through rock phosphate (RP) solubilization by Aspergillus niger in a solid-state fermentation (SSF) with sugarcane bagasse as substrate. SSF conditions were optimized by the surface response methodology after an initial screening of factors with significant effect on RP solubilization. The optimized levels of the factors were 865 mg of biochar, 250 mg of RP, 270 mg of sucrose and 6.2 ml of water per gram of bagasse. At this optimal setting, 8.6 mg of water-soluble P per gram of bagasse was achieved, representing an increase of 2.4 times over the non-optimized condition. The optimized SSF product was partially incinerated at 350°C (SB-350) and 500°C (SB-500) to reduce its volume and, consequently, increase P concentration. The post-processed formulations of the SSF product were evaluated in a soil–plant experiment. The formulations SB-350 and SB-500 increased the growth and P uptake of common bean plants (Phaseolus vulgaris L.) when compared with the non-treated RP. Furthermore, these two formulations had a yield relative to triple superphosphate of 60% (on a dry mass basis). Besides increasing P concentration, incineration improved the SSF product performance probably by decreasing microbial immobilization of nutrients during the decomposition of the remaining SSF substrate. The process proposed is a promising alternative for the management of P fertilization since it enables the utilization of low-solubility RPs and relies on the use of inexpensive materials.