scholarly journals Enzymatic hydrolysis of the organic fraction of municipal solid waste: Optimization and valorization of the solid fraction for Bacillus thuringiensis biopesticide production through solid-state fermentation

2022 ◽  
Vol 137 ◽  
pp. 304-311
Author(s):  
Esther Molina-Peñate ◽  
Antoni Sánchez ◽  
Adriana Artola
Keyword(s):  
Solid State ◽  
Bacillus Thuringiensis ◽  
Enzymatic Hydrolysis ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Solid Fraction ◽  
Solid State Fermentation ◽  
Organic Fraction ◽  
Hydrolysis Of

scholarly journals Integration of Solid State and Submerged Fermentations for the Valorization of Organic Municipal Solid Waste

2021 ◽  
Vol 7 (9) ◽  
pp. 766
Author(s):  
Gheorghe-Adrian Martău ◽  
Peter Unger ◽  
Roland Schneider ◽  
Joachim Venus ◽  
Dan Cristian Vodnar ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Solid State ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bacillus Coagulans ◽  
Aspergillus Awamori ◽  
Organic Residues ◽  
Organic Fraction ◽  
Hydrolysis Of ◽  
Suitable Process

Solid state fermentation (SsF) is recognized as a suitable process for the production of enzymes using organic residues as substrates. However, only a few studies have integrated an evaluation of the feasibility of applying enzymes produced by SsF into subsequent hydrolyses followed by the production of target compounds, e.g., lactic acid (LA), through submerged-liquid fermentations (SmF). In this study, wheat bran (WB) was used as the substrate for the production of enzymes via SsF by Aspergillus awamori DSM No. 63272. Following optimization, cellulase and glucoamylase activities were 73.63 ± 5.47 FPU/gds and 107.10 ± 2.63 U/gdb after 7 days and 5 days of fermentation, respectively. Enzymes were then used for the hydrolysis of the organic fraction of municipal solid waste (OFMSW). During hydrolysis, glucose increased considerably with a final value of 19.77 ± 1.56 g/L. Subsequently, hydrolysates were fermented in SmF by Bacillus coagulans A166 increasing the LA concentration by 15.59 g/L. The data reported in this study provides an example of how SsF and SmF technologies can be combined for the valorization of WB and OFMSW.

Enzymatic pre-hydrolysis of organic fraction of municipal solid waste to enhance anaerobic digestion

2019 ◽  
Vol 127 ◽  
pp. 105286 ◽  
Author(s):  
Najwa Mlaik ◽  
Sonia Khoufi ◽  
Manel Hamza ◽  
Mohamed Ali Masmoudi ◽  
Sami Sayadi
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Fraction ◽  
Hydrolysis Of
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