A Mild Thermal Pre-treatment of the Organic Fraction of Municipal Wastes Allows High Ethanol Production by Direct Solid-state Fermentation

Respiro-fermentative metabolism in yeast cultivated in solid-state culture: The Crabtree effect and ethanol production

“…A solid standard mixture (SSM) of the organic fraction of municipal solid waste (OFMSW) was obtained following the methodology proposed by Estrada-Martínez et al (2019). The structural carbohydrates as % dry matter (DM) of SSM were characterized using the methodology reported by Sluiter et al (2011)…”

“…The bed height of the moist material accounted for almost half the height of the indoor bioreactor (Ruíz-Leza et al, 2020). The fermentation monitoring at laboratory and pilot-scale was following the methodology proposed by Estrada-Martínez et al (2019). Samples were obtained at periodic interval times and stored at -20 ºC until further analysis by HPLC.…”

“…The pH, moisture content (Bradley, 2010), carbohydrates, and ethanol concentration were determined following the methodologies previously reported by Estrada-Martínez et al, 2019. The evolution of bioprocess at the pilot-scale was directly monitored through CO 2 and O 2 concentrations. These were monitored through periodic measurement of the gaseous atmosphere obtained from de bioreactor using a GOWMAC Series 580 gas chromatograph and experimental gases concentration pattern was expressed using a simple moving average of 5 points (Saucedo-Castañeda et al, 1994;Estrada-Martínez et al, 2019).…”

The next-generation biomass for biorefining

“…Based on the development of genetic engineering, it is possible to bioconvert target bio-products using various organic wastes as feedstock (Kim et al 2020). The utilization of organic wastes such as agricultural residues, crude glycerol, fruits peel, juice processing residues, municipal wastes, spent coffee grounds, waste cooking oils, and waste paper sludge has been reported, and its origins are very diverse: urban, agricultural, food processing, paper industry, and biodiesel production processes (Ibrahim et al 2018;Estrada-Martínez et al 2019;Lee et al 2020a,b). These organic wastes have various advantages such as no required farmland, low price, and year-round availability.…”

Mathematical modeling for monitoring and controlling aerobic degradation conditions of the organic fraction of urban solid waste

“…In the study of aerobic degradation of organic wastes (OFMSW) from food establishments (restaurants and juice bar) of the Iztapalapa municipality in Mexico City were used according to Estrada-Martínez et al (2019). A solid organic mixture (SOM) reported by Martínez-Valdez et al (2015) was used as a substrate, which contained: pruning waste (2 % w w −1 ), OFMSW (83 % w w −1 ), paper (3 % w w −1 ), and sawdust (4 % w w −1 ); with a carbon/nitrogen (C N −1 ) ratio of 30.…”