This report evaluates the sustainability of various used for biofuel production. The assessment covers ten different feedstocks, including Used Cooking Oil (UCO), Palm Oil Mill Effluent (POME) oil, Spent Bleach Earth (SBE) oil, soap stock acid oils, animal fats, Fatty Acid Methyl Ester (FAME) bottoms, brown grease, sewage, and food waste. The key aspects analysed for each feedstock include overall sustainability concerns, plausible global volumes, competing industries, potential risks of indirect land use change (iLUC), geographical dependencies, and potential mitigating actions.
Greenhouse-gas emission (GHG) metric values for methane in the sixth assessment report by the Intergovernmental Panel on Climate Change (IPCC) include the indirect effect associated to the oxidation of methane to CO2. An analysis of the figures provided by the IPCC reveals they assume that in average 75% of methane is ultimately oxidized to CO2, while the remaining 25% is converted to intermediate degradation products, most notably formaldehyde, which are removed from the atmosphere via wet and dry deposition and treated by the IPCC as a potential carbon sink in terrestrial and aquatic ecosystems. In this short article we present a critique to this assumption, based on existing knowledge about the environmental fate of methane's degradation products. We conclude that any assumption other than full degradation of methane to CO2 in a rather short time frame is questionable, whereby the default CO2 yield from this oxidation, as far as GHG metrics are concerned, should be 100%. We re-calculate values for the global warming potential (GWP) metric in accordance with our findings, resulting in an increase in GWP100 from 29.8 and 27.0 to 30.40 and 27.65 kg CO2-equivalents/kg fossil and biogenic methane, respectively. Although we only present the implications in terms GWP, our proposal is conceptually valid for other GHG metrics as well.
In Triple-A-COAT* three forms of nanocellulose will be augmented for antimicrobial/antiviral/antifungal activity through grafting/adsorption of novel, resistance-proof compounds with excellent activities against bacteria, fungi and/or viruses, and nanopatterning to create bio-inspired antimicrobial surfaces.
Nanocellulose is a versatile nanomaterial obtained from wood pulp or biotechnological methods. It has excellent physical properties for coatings, enabling controllable and standardised application of antimicrobial functionalities.
The goal of the project is to meet or exceed current antimicrobial/antiviral/antifungal coatings efficacy, but with a minimal risk of resistance development and avoiding the safety issues of inorganic nanoparticles. In Triple-A-COAT, 2.-0 LCA consultants will apply LCA to the production, use and disposal of nanocellulose, and compare the LCAs of the best performing coatings with competing products. This may identify ways in which Triple-A-COAT partners can optimize the sustainability of the coatings even further.
Within 5-10 years after the end of the project, the results will be commercialized for impact in the transportation and healthcare sectors, contributing to the better control of infectious disease, and boosting the competitiveness and research leadership of EU industry including SMEs.
The project coordinator is Belgian university KU Leuven and you can read more on the project website and join the project social media on: Twitter, Linkedin, Facebook.
*Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or The European Health and Digital Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.
The unique feature of the 2.-0 SDG framework is the use of sustainable wellbeing (utility) as a comprehensive summary indicator for all social, ecosystem and economic impacts. This indicator provides a single, quantitative endpoint for all causal impact pathways that have their starting point in the many different pressure (LCI) indicators, measurable at the level of specific production or consumption activities. Each pressure indicator is linked to the endpoint via the indicators for 169 targets of the 17 UN Sustainable Development Goals (SDGs). The endpoint is expressed in units of Quality-Adjusted person-Life-Years.
The comprehensive impact pathway framework can be applied to differentiate major from minor impact pathways, to identify impact pathways that are not explicitly covered by any of the 169 sustainability targets, and to point out trade-offs and synergies between the targets and their indicators. Due to the use of a single endpoint, the framework allows to quantify such trade-offs and synergies, to compare business decisions, performance and improvement options across industry sectors. Thereby, the 2.-0 LCSA framework contrasts with the “cherry-picking” approach to the SDGs in current business applications. Instead, we support a rational choice of business development strategies through matching the sphere of influence of each specific business enterprise with the impact pathway framework.
The project provides estimated uncertainty ranges on each of the causal links of the impact pathways, using numerical data when possible and verbal scales when numerical data are insufficient.
The project builds on and extends the impact assessment method developed by 2.-0 LCA consultants for social footprinting, which has been successfully tested for feasibility in global supply chain contexts, to support different business decisions, from single product purchases to larger policy changes, using a product life-cycle assessment approach to link specific company data to a global multi-regional input-output database with environmental and socio-economic extensions (see e.g. Schenker & Weidema 2017). The method has a low data requirement for screening purposes, and can be based exclusively on open data sources, with options for extending the level of detail when more data are available.
The project provides an actionable and rational method for businesses and governments to integrate the SDGs into decision making and monitoring, and will therefore contribute substantially to streamline and coordinate action and increase efficiency in implementing the 2030 Agenda.
Presentation of the project (9 min video on youtube): https://youtu.be/z8P6O5hP1rA
The project deliverables include:
Project members have early access to project deliverables. See below for deliverables that have already become open access.
The early development work was partly funded by the UNEP Life Cycle Initiative as part of the project “Linking the UN Sustainable Development Goals to life cycle impact pathway frameworks” and the EU Horizon project HyperCOG under grant agreement No.869886.
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Relative importance of sustainability impact pathways – A first rough assessment
Data collection guideline for pressure indicators for LCSA
Data files for Life Cycle SDG Assessment
The project will provide a globally unique tool for quantitative assessment of the climate effects of decision alternatives, popularly speaking a ‘climate footprint generator’, as well as a mechanism to ensure its continued updating. The project addresses a lack of updated, detailed, globally complete, valid, and trustworthy LCA data. The project expands the level of detail, coverage, and applicability of the currently most advanced hybrid input-output database (EXIOBASE 3).
Read more about the project, the work packages, and the project partners at the project page at Aalborg University (DCEA).
Publication from the project: Input-output modelling for household activity-level environmental footprints: a systematic literature review.
This project for Nordic Ecolabelling reviewed the current landscape of life-cycle based standards, methods and tools available for designers and producers of buildings and building materials. The primary objective was to assess the feasibility of adding additional ecolabel criteria for specific building materials or parts requiring calculations of the global warming impact for either a part or the entire life cycle of the buildings. The project resulted in a publicly available report where we identify a number of ambiguities in the standards that cause inconsistencies in their interpretation and practical implementation, resulting in a limited comparability of results from different databases and tools. We conclude that the current consistency and comparability of life-cycle based calculations for construction products are insufficient to be the basis for the Nordic Ecolabelling programme to require such calculations as part of their criteria. The report includes a number of additional recommendations to Nordic Ecolabelling.
Due to increased policy attention on circular economy strategies, many studies have quantified material use and recovery at national and global scales. However, there has been no quantitative analysis of the unrecovered waste that can be potentially reintegrated into the economy as materials or products. This can be interpreted as the gap of material circularity. In this paper we define the circularity gap of a country as the generated waste, plus old materials removed from stocks and durable products disposed (i.e. stock depletion), minus recovered waste. We estimated the circularity gap of 43 nations and 5 rest of the world regions in 2011, using the global, multiregional hybrid-units input-output database EXIOBASE v3.3. Our results show the trends of circularity gap in accordance to each region. For example, the circularity gaps of Europe and North America were between 1.6–2.2 tonnes per capita (t/cap), which are more than twice the global average gap (0.8 t/cap). Although these regions presented the major amount of material recovery, their circularity gaps were mostly related to the levels of stock depletion. In Africa and Asia-Pacific regions, the circularity gap was characterized by a low degree of recovery and stock depletion, with high levels of generated waste. Moreover, we discuss which intervention types can be implemented to minimize the circularity gap of nations.
Interest from the research and policy community in the circular economy (CE) is growing. This research describes how the potential for a circular economy in open economies can be estimated by using different assessment methods. Methods and indicators have been selected that have a relevance for one or more of the public policy objectives for circular economy: Openness Index, economic structure, Balassa Index, value chain analysis, substitution potential of Sustainable Materials Management (SMM) strategies, waste treatment scenarios based on physical and hybrid Input-Output (IO) analysis. These methods differ in scope and degrees of complexity and are used at different assessment levels. The potential for a circular economy in this paper is assessed by evaluating the contribution to the public policy objectives for CE: resource efficiency, reduction of dependency on materials, competitiveness, creation of domestic jobs, reduced Greenhouse Gas (GHG) emissions. Results obtained by these methods are shown for Belgium and, in some cases, compared to the results of other countries to illustrate the differences between economies. CE activities (in response to public policy objectives) will enhance the ongoing trend of reducing the share of primary sectors in economies. The openness of an economy is expressed as the ratio of sum of import and export and Gross Domestic Product (GDP). Imported products add to the potential of domestic closed-loop circular initiatives like re-use, repair, remanufacture, recycling, but this will require knowledge about composition and spare part availability. Exported products are no longer available for these domestic CE initiatives, reducing the domestic potential for CE and the domestic export activity is vulnerable to CE activities abroad. Especially the increasing geographical distance in trade complicates the practical and legal barriers to close the loop. In open economies, both global and domestic substitution effects due to new circular economy policy initiatives are important to consider.
The fifth assessment report by the IPCC includes methane oxidation as an additional indirect effect in the global warming potential (GWP) and global temperature potential (GTP) values for methane. An analysis of the figures provided by the IPCC reveals they lead to different outcomes measured in CO2-eq., depending on whether or not biogenic CO2 emissions are considered neutral. In this article, we discuss this inconsistency and propose a correction.
We propose a simple framework to account for methane oxidation in GWP and GTP in a way that is independent on the accounting rules for biogenic carbon. An equation with three components is provided to calculate metric values, and its application is tested, together with the original IPCC figures, in a hypothetical example focusing on GWP100.
The hypothetical example shows that the only set of GWP100 values consistently leading to the same outcome, regardless of how we account for biogenic carbon, is the one proposed in this article. Using the methane GWP100 values from the IPCC report results in conflicting net GHG emissions, thus pointing to an inconsistency.
In order to consistently discriminate between biogenic and fossil methane sources, a difference of 2.75 kg CO2-eq. is needed, which corresponds to the ratio of the molecular weights of CO2 and methane (44/16). We propose to correct the GWP and GTP values for methane accordingly.
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