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Mixed Culture Polyhydroxyalkanoate Production as a Wood Processing Biorefinery Option

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Biorefinery: A Sustainable Approach for the Production of Biomaterials, Biochemicals and Biofuels

Abstract

Polyhydroxyalkanoates (PHAs) are a group of biodegradable, compostable and biocompatible biopolymers that are synthesised by microorganisms. Intensive research efforts leading to significant developments on mixed culture PHA production over the years have led to commercialisation of these processes. However, potential feedstocks remain untapped due to technical and cost considerations that have limited the widespread use of this technology. This article is intended to review some wood processing industry residue conversion technologies for wood sugar and volatile fatty acid production. Wood sugars and volatile fatty acids can be carbon sources for mixed culture PHA production. A conceptual design incorporating wastewater treatment is proposed for PHA production, as a biorefinery option for an integrated wood processing site. The two-stage PHA production process utilises the carbon in wastewater produced in a pulp mill and sugars from pretreated wood residues to produce PHA reducing the cost of production and improving the carbon utilisation of wood processing sites. A mass balance-based model was used to evaluate scenarios with different PHA yields. The article also discusses some potential product options and market applications of PHA.

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Abbreviations

AD:

Anaerobic digestion

ADF:

Aerobic dynamic feeding

ATP:

Adenosine triphosphate

COD:

Chemical oxygen demand

DO:

Dissolved oxygen

DS:

Dissolved solids

EPS:

Extracellular polymeric substance

GAO:

Glycogen accumulating organisms

HV:

Hydroxyvalerate

LDPE:

Low-density polyethylene

Mcl:

Medium-chain-length

MMC:

Mixed microbial consortia

Odt:

Oven-dry tonnes

PAO:

Polyphosphate accumulating organisms

PHA:

Polyhydroxyalkanoates

PHB:

Polyhydroxybutyrate

PHBV:

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

PP:

Polypropylene

PS:

Polystyrene

RNA:

Ribonucleic acid

SBR:

Sequencing batch reactor

Scl:

Short-chain-length

SCW:

Supercritical water

ThOD:

Theoretical oxygen demand

TMP:

Thermo-mechanical pulp

TSS:

Total suspended solids

VFA:

Volatile fatty acids

WF:

Wood fibre

WFRTC:

Wood fibre-reinforced thermoplastic composites

WO:

Wet oxidation

WPC:

Wood plastic composites

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Correspondence to Suren L. J. Wijeyekoon .

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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Wijeyekoon, S.L.J., Suckling, I.D. (2023). Mixed Culture Polyhydroxyalkanoate Production as a Wood Processing Biorefinery Option. In: Pathak, P.D., Mandavgane, S.A. (eds) Biorefinery: A Sustainable Approach for the Production of Biomaterials, Biochemicals and Biofuels. Springer, Singapore. https://doi.org/10.1007/978-981-19-7481-6_1

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