Felisbela Maria Araújo Oliveira

Erratum to: Optimization of Xylanase Production by Filamentous Fungi in Solid-State Fermentation and Scale-up to Horizontal Tube Bioreactor

The original version of this article unfortunately contained a mistake in the pictures depicted in the right column of Fig. 4 regarding the SEM photographs showing the morphology of lignocellulosic surface of a) raw corncob, b) destarched corncob, c) destarched corncob followed by NaOH treatment, d) destarched corncob followed by NH4OH treatment, e) destarched corncob treated by autoclave, and f) destarched corncob treated by autoclave and microwave. The correct Figure should be the following: Appl Biochem Biotechnol (2015) 176:317–319 DOI 10.1007/s12010-015-1534-1

Olive pomace valorization by Aspergillus species: lipase production using solid-state fermentation.

BACKGROUND Pollution by olive mill wastes is an important problem in the Mediterranean area and novel solutions for their proper management and valorization are needed. The aim of this work was to optimize a solid-state fermentation (SSF) process to produce lipase using olive pomace (OP) as the main source of nutrients by several Aspergillus spp. Optimized variables in two different designs were: ratio between olive pomace and wheat bran (OP:WB), NaNO3 , Czapek nutrients, fermentation time, moisture content (MC) and temperature. RESULTS Results showed that the mixture OP:WB and MC were the most significant factors affecting lipase production for all fungi strains tested. With MC and temperature optimization, a 4.4-fold increase in A. ibericus lipase was achieved (90.5 ± 1.5 U g(-1) ), using a mixture of OP and WB at 1:1 ratio, 0.02 g NaNO3 g(-1) dry substrate, absence of Czapek nutrients, 60% of MC and incubation at 30 °C for 7 days. For A. niger and A. tubingensis, highest lipase activity obtained was 56.6 ± 5.4 and 7.6 ± 0.6 U g(-1) , respectively. CONCLUSION Aspergillus ibericus was found to be the most promising microorganism for lipase production using mixtures of OP and WB.