Liquid biofuels from the organic fraction of municipal solid waste: A review

Barampouti, Elli Maria; Mai, Sofia; Malamis, Dimitris; Μουστάκας, Κωνσταντίνος; Loizidou, Maria

doi:10.1016/j.rser.2019.04.005

Cited by 104 publications

(41 citation statements)

References 131 publications

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“…Compositional profiles for autoclave pre-treated OMSW have been reported in three other studies [10,29,30]. All, including this study, report about 50% greater polysaccharide levels than the averages calculated by Barampouti et al [10] in their review of the relevant literature. This indicates that autoclaving is also an effective strategy for isolating and concentrating organic materials in OMSW.…”

Section: Omsw Fibre As a Feedstock For Bio-manufacturingsupporting

confidence: 74%

“…Autoclaving is an established industrial-scale process that is widely employed in the waste industry to rapidly, hygienically and effectively recover resources from MSW [71,72]. Compositional profiles for autoclave pre-treated OMSW have been reported in three other studies [10,29,30]. All, including this study, report about 50% greater polysaccharide levels than the averages calculated by Barampouti et al [10] in their review of the relevant literature.…”

Section: Omsw Fibre As a Feedstock For Bio-manufacturingsupporting

confidence: 55%

“…MOPS defined medium was based on Neidhardt's MOPS defined medium [42] with some minor changes. MOPS defined medium contained (in mM): K 2 HPO 4 (0.50), NH 4 Cl [10], MgCl 2 (0.523), K 2 SO 4 (0.276), FeSO 4 (0.010), CaCl 2 (5 × 10 −4 ), NaCl [50], MOPS [40], (NH 4 ) 6 (MO 7 ) 24 (3 × 10 −6 ), H 3 BO 3 (4 × 10 −4 ) CoCl 2 (3 × 10 −6 ), CuSO 4 (1 × 10 −5 ), MnCl 2 (8 × 10 −5 ) and ZnSO 4 (1 × 10 −5 ). The last six components were prepared as a 5000× stock solution in 100 mL dH 2 O and stored at RT.…”

Section: Growth Assays With E Coli Lw06mentioning

confidence: 99%

“…It can also be highly economical to source as landfill taxes and gate fees are often legislated to incentivise recycling and alternative routes of disposal (landfill tax rates in most European countries are at least €30 per tonne [4]). So far however research into the amenability of OMSW for producing value-added products such as biofuels has been limited compared to other feedstocks [9,10]. Valorising OMSW for biomanufacturing poses several unique challenges, including the need for effective and commercially viable separation of the organic and inorganic fractions; inconsistent and heterogeneous feedstock composition; and the presence of metals and other pollutants in the final feedstock that could be inhibitory to enzymes and fermentative microorganisms.…”

mentioning

confidence: 99%

“…The complexity of OMSW contrasts starkly with agricultural and forestry by-products which generally exhibit relatively consistent compositional profiles and do not typically contain contaminants such as toxic metals [8,11]. The abundance of organic waste in MSW ranges from 30 to 60% [1] and reports of lignocellulose content in OMSW vary between ~ 10 and 60% [10]. Typically, OMSW used for research purposes is obtained through manual sampling and sorting of MSW from local establishments [12][13][14] or acquired from nearby waste treatment plants [15][16][17][18][19].…”

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confidence: 99%

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Robust microorganisms for biofuel and chemical production from municipal solid waste

et al. 2020

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Background: Worldwide 3.4 billion tonnes of municipal solid waste (MSW) will be produced annually by 2050, however, current approaches to MSW management predominantly involve unsustainable practices like landfilling and incineration. The organic fraction of MSW (OMSW) typically comprises ~ 50% lignocellulose-rich material but is underexplored as a biomanufacturing feedstock due to its highly inconsistent and heterogeneous composition. This study sought to overcome the limitations associated with studying MSW-derived feedstocks by using OMSW produced from a realistic and reproducible MSW mixture on a commercial autoclave system. The resulting OMSW fibre was enzymatically hydrolysed and used to screen diverse microorganisms of biotechnological interest to identify robust species capable of fermenting this complex feedstock. Results:The autoclave pre-treated OMSW fibre contained a polysaccharide fraction comprising 38% cellulose and 4% hemicellulose. Enzymatic hydrolysate of OMSW fibre was high in d-glucose (5.5% w/v) and d-xylose (1.8%w/v) but deficient in nitrogen and phosphate. Although relatively low levels of levulinic acid (30 mM) and vanillin (2 mM) were detected and furfural and 5-hydroxymethylfurfural were absent, the hydrolysate contained an abundance of potentially toxic metals (0.6% w/v). Hydrolysate supplemented with 1% yeast extract to alleviate nutrient limitation was used in a substrate-oriented shake-flask screen with eight biotechnologically useful microorganisms (Clostridium saccharoperbutylacetonicum, Escherichia coli, Geobacillus thermoglucosidasius, Pseudomonas putida, Rhodococcus opacus, Saccharomyces cerevisiae, Schizosaccharomyces pombe and Zymomonas mobilis). Each species' growth and productivity were characterised and three species were identified that robustly and efficiently fermented OMSW fibre hydrolysate without significant substrate inhibition: Z. mobilis, S. cerevisiae and R. opacus, respectively produced product to 69%, 70% and 72% of the maximum theoretical fermentation yield and could theoretically produce 136 kg and 139 kg of ethanol and 91 kg of triacylglycerol (TAG) per tonne of OMSW. Conclusions: Developing an integrated biorefinery around MSW has the potential to significantly alleviate the environmental burden of current waste management practices. Substrate-oriented screening of a representative and reproducible OMSW-derived fibre identified microorganisms intrinsically suited to growth on OMSW hydrolysates. These species are promising candidates for developing an MSW biorefining platform and provide a foundation for future studies aiming to valorise this underexplored feedstock. © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third part...

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Section: Omsw Fibre As a Feedstock For Bio-manufacturingsupporting

confidence: 74%

Section: Omsw Fibre As a Feedstock For Bio-manufacturingsupporting

confidence: 55%

Section: Growth Assays With E Coli Lw06mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Robust microorganisms for biofuel and chemical production from municipal solid waste

et al. 2020

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Role of Microbes and Microbial Consortium in Solid Waste Management

Jain

Pattanaik

Padhi

et al. 2021

Environmental and Agricultural Microbiology

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Yeast immobilization systems for second‐generation ethanol production: actual trends and future perspectives

Chacón-Navarrete

Martı́n

Moreno-García

2021

Biofuels Bioprod Bioref

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Yeast immobilization with low‐cost carrier materials is a suitable strategy to optimize the fermentation of lignocellulosic hydrolysates for the production of second‐generation (2G) ethanol. It is defined as the physical confinement of intact cells to a certain region of space (the carrier) with the preservation of their biological activity. This technological approach facilitates promising strategies for second‐generation bioethanol production due to the enhancement of the fermentation performance that is expected to be achieved. Using immobilized cells, the resistance to inhibitors contained in the hydrolysates and the co‐utilization of sugars are improved, along with facilitating separation operations and the reuse of yeast in new production cycles. Until now, the most common immobilization technology used calcium alginate as a yeast carrier but other supports such as biochar or multispecies biofilm membranes have emerged as interesting alternatives. This review compiles updated information about cell carriers and yeast‐cell requirements for immobilization, and the benefits and drawbacks of different immobilization systems for second‐generation bioethanol production are investigated and compared.

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Liquid biofuels from the organic fraction of municipal solid waste: A review

Cited by 104 publications

References 131 publications

Robust microorganisms for biofuel and chemical production from municipal solid waste

Robust microorganisms for biofuel and chemical production from municipal solid waste

Role of Microbes and Microbial Consortium in Solid Waste Management

Yeast immobilization systems for second‐generation ethanol production: actual trends and future perspectives

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