Design of biorefineries towards carbon neutrality: A critical review

Culaba, Alvin B.; Mayol, Andres Philip; Juan, Jayne Lois G. San; Ubando, Aristotle T.; Concepcion, Ronnie; Alipio, Melchizedek I.; Chen, Wei‐Hsin; Show, Pau Loke; Chang, Jo‐Shu

doi:10.1016/j.biortech.2022.128256

“…The AD scenario generated net savings through electricity substitution, but heat substitution was lower, due to the temperature requirements (mesophilic) of the digester itself. Consequently, landfill remained the worst option, followed by composting, which is a similar outcome to that of Slorach et al 60 and Culaba et al 61 Net savings were observed for the AD and incineration scenarios; hence, these two options were found preferable for decarbonization of FW management at Ayazağa Campus.…”

Section: Resultssupporting

confidence: 78%

Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Maçin,

Arıkan,

Altınbaş

et al. 2023

Env Prog and Sustain Energy

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Food waste is a significant environmental issue today, as it contributes to depleting natural resources and greenhouse gas emissions from improper management. To address this, alternative food waste management and recovery strategies must be developed to promote nutrient recirculation and move towards decarbonization. University campuses could play a crucial role in pioneering such strategies, through pilot studies and implementation of effective waste management. The aim of this study is to devise a food waste management strategy that provides a more circular and decarbonized economy. A case example was developed based on ITU Ayazağa Campus, Turkey, with annual separated food waste of 577 tonne per year. A Life Cycle Assessment was conducted using the EASETECH software. Four scenarios were evaluated: anaerobic digestion, composting, incineration, and landfill. Of these, incineration resulted in the highest CO2‐eq savings, but lacked decoupling and circularity of resources. Conversely, anaerobic digestion demonstrated the highest circularity and lowest toxicity. Based on these findings, anaerobic digestion was selected for further investigation. Economic transactions for the anaerobic digestion system's business models were analyzed, including revenues, municipality fees, and operating costs. The new economic model is expected to align with circular economy strategies and promote stakeholder collaboration as a significant social outcome.

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“…Instead, focus is now shifting towards the use of organic process residuals and wastes from the agricultural, forestry, paper and pulp and food industries as biorefinery inputs 11–14 . Whilst this supports a more circular bioeconomy future 6,15 , to date, the use of such waste-to-feedstock symbioses has been limited to industrial pre-consumer waste streams with limited heterogeneity.…”

Section: Mainmentioning

confidence: 96%

Complex waste stream valorisation through combined enzymatic hydrolysis and catabolic assimilation byPseudomonas putida

Gonzalez

¹

,

Chacόn

²

,

Fisher

³

et al. 2023

Preprint

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Linear consumption models in combination with the poor waste management results in negative impact upon the climate and environment. Here we show an advanced biorefinery concept to produce biopolymers and recombinant therapeutic proteins from municipal solid waste. Careful selection and metabolic engineering of Pseudomonas putida was employed to permit efficient co-utilisation of complex, heterogenous substrate compositions derived from the most abundant municipal solid waste fractions. Enzymatic pre-treatment of the feedstock was performed, which afforded sufficient carbon for growth and bio-production of value-added products. Unlike current waste processing methods and supply of feedstocks for bio-based manufacturing, this biorefinery concept re-directs the carbon away from direct emissions and creates a land-use negative feedstock ideal for advanced biomanufacturing. We envisage this demonstration will lead to the creation of circular consumption solutions for waste and bio-production of a range of chemicals and materials in future resource finite scenarios.

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“…Global supply chains are dominated by linear, carbon positive, economic models; extract, use, dispose, which creates unsustainable systems reliant on finite geological reserves. Growing awareness of the damaging impact of this model upon the climate has spurred urgent action by the international community to find solutions to mitigate greenhouse gas emissions [1][2][3][4][5][6] . Biotechnology provides opportunities to shift from a linear to a more circular bio-based economic model.…”

Section: Mainmentioning

confidence: 99%

Degradation and bioconversion of complex municipal solid waste streams into human biotherapeutics and biopolymers

Gonzalez

¹

,

Chacόn

²

,

Berepiki

³

et al. 2023

Preprint

1

0

View full text Add to dashboard Cite

Linear consumption models in combination with the poor waste management results in negative impact upon the climate and environment. Here we show an advanced biorefinery concept to produce biopolymers and recombinant therapeutic proteins from municipal solid waste. Careful selection and metabolic engineering of Pseudomonas putida was employed to permit efficient co-utilisation of complex, heterogenous substrate compositions derived from the most abundant municipal solid waste fractions. Enzymatic pre-treatment of the feedstock was performed, which afforded sufficient carbon for growth and bio-production of value-added products. Unlike current waste processing methods and supply of feedstocks for bio-based manufacturing, this biorefinery concept re-directs the carbon away from direct emissions and creates a land-use negative feedstock ideal for advanced biomanufacturing. We envisage this demonstration will lead to the creation of circular consumption solutions for waste and bio-production of a range of chemicals and materials in future resource finite scenarios.

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Design of biorefineries towards carbon neutrality: A critical review

Cited by 34 publications

References 81 publications

Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Complex waste stream valorisation through combined enzymatic hydrolysis and catabolic assimilation byPseudomonas putida

Degradation and bioconversion of complex municipal solid waste streams into human biotherapeutics and biopolymers

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