Novel approach for the treatment of the organic fraction of municipal solid waste: Coupling thermal hydrolysis with anaerobic digestion and photo-fermentation

Allegue, Luis D.; Puyol, Daniel; Melero, Juan A.

doi:10.1016/j.scitotenv.2020.136845

Cited by 29 publications

(12 citation statements)

References 69 publications

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“…Both samples were stored at 4°C until further use. The organic matter and nutrient solubilization extent were calculated according to previous work (Allegue et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…Gas pressure in BMP and SPA tests was measured using a Boyle‐Mariotte apparatus, and biogas composition was quantified by gas chromatography coupled to a thermal conductivity detector, as reported in Segura et al (2016), thereby calculating the CH 4 production. Quantification of the PHA content was performed on the fixed PPB samples, according to previous work (Allegue et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…The energy balance of the process was assessed to ensure the sustainability and economic viability of the process (Avellar & Glasser, 1998). Energy balances have been carried out simulating a commercial Cambi ® CHP plant and following Allegue et al (2020). Energy integration and parameters chosen have been previously described in Scenario two in Cano et al (2014).…”

Section: Methodsmentioning

confidence: 99%

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Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

et al. 2021

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Purple phototrophic bacteria (PPB) showed an enormous potential for polyhydroxyalkanoates (PHA) production using the hydrolysate from lignocellulosic waste as feedstock. Thermal hydrolysis pretreatment was carried out at three different temperatures (120, 150, and 180°C) aiming to improve the biodegradability of the lignocellulosic waste. After this pretreatment, two streams are collected: a solid and a liquid fraction. The anaerobic digestion process of the pretreated solid fraction at 180°C increased its biodegradability extent by 31% compared to the untreated biomass, yielding 210 ± 10 L CH4 kg−1 VS even when the liquid fraction was removed. On the photoheterotrophic of the liquid fraction, PPB were able to remove up to 55% of COD during batch operation, showing peaks of PHA production yield up to 21 wt.%. The treatment of the liquid fraction obtained at high temperatures (T ˃ 120°C) reduces biomass growth and COD consumption efficiency, and thus potential productivity, with no effect over the specific activity and the biomass yield, indicating growth limitation by lack of nutrients (N and P). A preliminary economical assessment indicates suitable economic viability based on an energetic autarchy process. This study pioneered a PPB‐based biorefinery for PHA production from lignocellulosic residues and aligned within the bioeconomy strategy of the European Union.

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“…Both samples were stored at 4°C until further use. The organic matter and nutrient solubilization extent were calculated according to previous work (Allegue et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

et al. 2021

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“…It reduces particle size and improves the available surface area for microbial action that facilitates the solubilisation of organic matter (Cesaro et al 2014;Allegue et al 2020). Recently, several other mechanical and thermal pretreatment methods such as thermal hydrolysis, press-extrusion, sonication, high pressure homogenization, and hydrothermal are being tested and are under the research and development (Paritosh et al 2018;Allegue et al 2020;Cesaro et al 2021). Another group of researchers has questioned the benefits of size reduction and given attention to other important factors.…”

Section: Msw As Substrate For Biogas Productionmentioning

confidence: 99%

Municipal solid waste management: A review of waste to energy (WtE) approaches

Ram

Kumar

Rani

2021

BioRes

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Global municipal solid waste (MSW) generation will increase to 2.2 billion tons per year by 2025 as per the World Bank projection. Improper waste management often leads to environmental degradation (i.e. water, air and soil pollution), transmission of diseases, and the release of greenhouse gases emissions, which contributes to climate change. To combat these problems, several countries are following the waste to energy (WtE) approach, which significantly reduces the volume of waste and generates renewable energy. Thus, the present study focuses on the municipal solid waste generation, composition, and waste to energy conversion technologies. Thermal conversion processes including incineration, pyrolysis, and gasification for heat, bio-oil, and syngas generation are already well established and are being employed in several countries. Currently, researchers are trying to improve the efficiency of biochemical methods such as anaerobic digestion, microbial fermentation, and microbial fuel cells for biogas, biohydrogen, and bioelectricity generation from MSW. This review explains the recent focus on microbial fermentation and microbial fuel cells for biofuels and bioelectricity production. Development of these technologies can lead to suitable eco-friendly approaches for the future. WtE technologies are important components of circular economy that will assist to achieve the demand of clean energy in future.

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“…Most developed countries have efficient OFMSW and industrial organic waste sorting systems and facilities, which has allowed them to use such residues in for biogas production [ 6 , 7 ]. However, biogas value is low and thus, several works have been presented for the valorization of OFMSW through the production of other chemicals, for example, bio-oils, volatile fatty acids subsequently used for biogas production, or polyhydroxyalkanoates [ 8 , 9 , 10 , 11 ], hydrogen [ 12 ], ethanol, enzymes, organic acid, biopolymers and bioplastics [ 13 , 14 , 15 , 16 , 17 ]. Nonetheless, the polymeric carbohydrates (mainly starch, cellulose and hemicellulose) present in the OFMSW need to be hydrolyzed in order to release simple sugars for the fermentation, which increases costs.…”

Section: Introductionmentioning

confidence: 99%

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

Martău

Unger

Schneider

et al. 2021

JoF

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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.

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Novel approach for the treatment of the organic fraction of municipal solid waste: Coupling thermal hydrolysis with anaerobic digestion and photo-fermentation

Cited by 29 publications

References 69 publications

Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

Integrated sustainable process for polyhydroxyalkanoates production from lignocellulosic waste by purple phototrophic bacteria

Municipal solid waste management: A review of waste to energy (WtE) approaches

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

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