Biodegradable and compostable alternatives to conventional plastics

J. H. Song, R. J. Murphy, R. Narayan, G. B H Davies

    Research output: Contribution to journalArticle

    • 104 Citations

    Abstract

    Packaging waste forms a significant part of municipal solid waste and has caused increasing environmental concerns, resulting in a strengthening of various regulations aimed at reducing the amounts generated. Among other materials, a wide range of oil-based polymers is currently used in packaging applications. These are virtually all non-biodegradable, and some are difficult to recycle or reuse due to being complex composites having varying levels of contamination. Recently, significant progress has been made in the development of biodegradable plastics, largely from renewable natural resources, to produce biodegradable materials with similar functionality to that of oil-based polymers. The expansion in these bio-based materials has several potential benefits for greenhouse gas balances and other environmental impacts over whole life cycles and in the use of renewable, rather than finite resources. It is intended that use of biodegradable materials will contribute to sustainability and reduction in the environmental impact associated with disposal of oil-based polymers. The diversity of biodegradable materials and their varying properties makes it difficult to make simple, generic assessments such as biodegradable products are all 'good' or petrochemical-based products are all 'bad'. This paper discusses the potential impacts of biodegradable packaging materials and their waste management, particularly via composting. It presents the key issues that inform judgements of the benefits these materials have in relation to conventional, petrochemical-based counterparts. Specific examples are given from new research on biodegradability in simulated 'home' composting systems. It is the view of the authors that biodegradable packaging materials are most suitable for single-use disposable applications where the post-consumer waste can be locally composted.

    Original languageEnglish (US)
    Pages (from-to)2127-2139
    Number of pages13
    JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
    Volume364
    Issue number1526
    DOIs
    StatePublished - Jul 27 2009

    Profile

    polymer
    oil
    Traffic Accidents
    Plastics
    Polymers
    Oils
    composting
    environmental impact
    plastic
    polymers
    oils
    packaging waste
    renewable resource
    municipal solid waste
    waste management
    greenhouse gas
    natural resource
    life cycle
    sustainability
    resource

    Keywords

    • Biodegradable
    • Biopolymers
    • Compostable
    • Environment
    • Packaging
    • Waste management

    ASJC Scopus subject areas

    • Agricultural and Biological Sciences(all)
    • Biochemistry, Genetics and Molecular Biology(all)

    Cite this

    Biodegradable and compostable alternatives to conventional plastics. / Song, J. H.; Murphy, R. J.; Narayan, R.; Davies, G. B H.

    In: Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 364, No. 1526, 27.07.2009, p. 2127-2139.

    Research output: Contribution to journalArticle

    Song, J. H.; Murphy, R. J.; Narayan, R.; Davies, G. B H / Biodegradable and compostable alternatives to conventional plastics.

    In: Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 364, No. 1526, 27.07.2009, p. 2127-2139.

    Research output: Contribution to journalArticle

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