Optimization of solid-state fermentation of citrus dried peel by aspergillus niger in a packed bed column

1986 ◽  
Vol 6 (3) ◽  
pp. 253-258 ◽  
Author(s):  
J. A. Rodriguez ◽  
W. Bechstedt ◽  
J. Echevarria ◽  
N. Sierra ◽  
G. Delgado ◽  
...  
Keyword(s):  
Solid State ◽  
Aspergillus Niger ◽  
Solid State Fermentation ◽  
Packed Bed ◽  
Packed Bed Column

Packed Bed Column Fermenter and Kinetic Modeling for Upgrading the Nutritional Quality of Coffee Husk in Solid-State Fermentation

2001 ◽  
Vol 17 (6) ◽  
pp. 1065-1070 ◽  
Author(s):  
D. Brand ◽  
A. Pandey ◽  
J.A. Rodriguez-Leon ◽  
S. Roussos ◽  
I. Brand ◽  
...  
Keyword(s):  
Solid State ◽  
Kinetic Modeling ◽  
Solid State Fermentation ◽  
Nutritional Quality ◽  
Packed Bed ◽  
Packed Bed Column ◽  
Coffee Husk ◽  
Column Fermenter

scholarly journals Valorization of Banana Peel for Citric Acid Production under Solid State Fermentation with Aspergillus niger

2020 ◽  
Vol 34 (1) ◽  
pp. 49-57
Author(s):  
Teerin Chysirichote
Keyword(s):  
Citric Acid ◽  
Solid State ◽  
Aspergillus Niger ◽  
Solid State Fermentation ◽  
Packed Bed ◽  
Aeration Rate ◽  
Banana Peel ◽  
Initial Ph ◽  
Glass Column ◽  
Cooling Air

Valorization of banana peel (BP) through solid state fermentation (SSF) was aimed<br /> in this research. The appropriate conditions of citric acid (CA) production by SSF of<br /> Aspergillus niger were investigated. Firstly, the optimum initial pH of the BP and the<br /> aeration rate were studied by conducting SSF in a 250-mL flask and 2-L glass column,<br /> respectively. It was found that the initial pH of the BP and aeration rates affected the CA<br /> production. The results showed that the initial pH of 5.0 and 1.0 vvm aeration were appropriate for the CA production of A. niger using BP as a substrate. The problem of rising temperature during SSF was found when applying the optimum condition to the SSF<br /> in the 20-L packed bed bioreactor (PBB), which caused a decrease in the CA production<br /> compared to that of the glass column. The cooling air jacket constructed to the PBB to<br /> remove the heat during the SSF helped increase the CA production from that in the PBB.<br /> The maximum CA production in the 20-L air-jacketed PBB was 124.0±19.2 mg g–1DS.

Intermittent agitation contributes to uniformity across the bed during pectinase production by Aspergillus niger grown in solid-state fermentation in a pilot-scale packed-bed bioreactor

2017 ◽  
Vol 121 ◽  
pp. 1-12 ◽  
Author(s):  
Anelize Terezinha Jung Finkler ◽  
Alessandra Biz ◽  
Luana Oliveira Pitol ◽  
Bruna Schweitzer Medina ◽  
Henrique Luithardt ◽  
...  
Keyword(s):  
Solid State ◽  
Aspergillus Niger ◽  
Solid State Fermentation ◽  
Packed Bed ◽  
Pilot Scale ◽  
Packed Bed Bioreactor ◽  
Pectinase Production

scholarly journals Sucrose Hydrolysis in a Continuous Packed-Bed Reactor with Auto-Immobilised Aspergillus Niger Biocatalyst Obtained by Solid-State Fermentation

2021 ◽  
Author(s):  
Antonio Martínez-Ruiz ◽  
Luz Tovar-Castro ◽  
Cristóbal N. Aguilar ◽  
Gerardo Saucedo-Castañeda ◽  
Ernesto Favela-Torres
Keyword(s):  
Solid State ◽  
Aspergillus Niger ◽  
Solid State Fermentation ◽  
Sucrose Concentration ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Hydrolysis Rate ◽  
Residence Times ◽  
Sucrose Hydrolysis ◽  
Operational Conditions

Abstract Invertase from Aspergillus niger C28B25 was produced by solid-state fermentation (SSF), and fermented solids were used directly as a biocatalyst for batch and continuous hydrolysis of sucrose in a packed-bed reactor under different operational conditions with varied temperature, sucrose concentration and feed flow rate. The SSF allowed obtaining a biocatalyst with an invertase activity of 82.2 U/g db. The biocatalyst maintained its activity in the range of 40 to 70ºC for at least 70 h of continuous operation. The highest hydrolysis rate (12.3 mg/U h) was obtained at 70ºC with 2M sucrose under batch conditions. Continuous hydrolysis in 20-mL and 200-mL bioreactors at 60ºC led to sucrose hydrolysis above 60% (8.5 residence times) and above 55% (4.5 residence times), respectively. The auto-immobilised biocatalyst produced by SSF without recovery, purification and immobilisation stages offers an economical alternative for the development of accessible biocatalysts that can be applied in batch or continuous sucrose hydrolysis processes. This study shows the potential of biocatalyst production by SSF for other enzymatic systems.

scholarly journals Food Waste-Assisted Metal Extraction from Printed Circuit Boards: The Aspergillus niger Route

2021 ◽  
Vol 9 (5) ◽  
pp. 895
Author(s):  
Carlotta Alias ◽  
Daniela Bulgari ◽  
Fabjola Bilo ◽  
Laura Borgese ◽  
Alessandra Gianoncelli ◽  
...  
Keyword(s):  
Solid State ◽  
Aspergillus Niger ◽  
Food Waste ◽  
Solid State Fermentation ◽  
Printed Circuit Boards ◽  
Electronic Waste ◽  
Metal Extraction ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards

A low-energy paradigm was adopted for sustainable, affordable, and effective urban waste valorization. Here a new, eco-designed, solid-state fermentation process is presented to obtain some useful bio-products by recycling of different wastes. Urban food waste and scraps from trimmings were used as a substrate for the production of citric acid (CA) by solid state fermentation of Aspergillus niger NRRL 334, with a yield of 20.50 mg of CA per gram of substrate. The acid solution was used to extract metals from waste printed circuit boards (WPCBs), one of the most common electronic waste. The leaching activity of the biological solution is comparable to a commercial CA one. Sn and Fe were the most leached metals (404.09 and 67.99 mg/L, respectively), followed by Ni and Zn (4.55 and 1.92 mg/L) without any pre-treatments as usually performed. Commercial CA extracted Fe more efficiently than the organic one (123.46 vs. 67.99 mg/L); vice versa, biological organic CA recovered Ni better than commercial CA (4.55 vs. 1.54 mg/L). This is the first approach that allows the extraction of metals from WPCBs through CA produced by A. niger directly grown on waste material without any sugar supplement. This “green” process could be an alternative for the recovery of valuable metals such as Fe, Pb, and Ni from electronic waste.

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