It is of utmost importance to collect organic waste from households as a separate waste stream. If collected separately, it could be used optimally to produce compost and biogas, it would not pollute fractions of materials that can be recovered from residual waste streams and it would not deteriorate the quality of some materials in residual waste (e.g. paper). In rural areas with separate organic waste collection systems, large quantities of organic waste are recovered. However, in the larger cities, only a small fraction of organic waste is recovered. In general, citizens dot not have space to store organic waste without nuisances of smell and/or flies. As this has been the cause of low organic waste collection rates, collection schemes have been cut, which created a further negative impact. Hence, additional efforts are required. There are some options to improve the organic waste recovery within the current system. Collection schemes might be improved, waste containers might be adapted to better suit the needs, and additional underground organic waste containers might be installed in residential neighbourhoods. There are persistent stories that separate organic waste collection makes no sense as the collectors just mix all municipal solid waste after collection, and incinerate it. Such stories might be fuelled by the practice that batches of contaminated organic waste are indeed incinerated. Trust in the system is important. Food waste is often regarded as unrein. Users might hate to store food waste in their kitchen that could attract insects, or the household pets. Hence, there is a challenge for socio-psychological research. This might also be supported by technology, e.g. organic waste storage devices and measures to improve waste separation in apartment buildings, such as separate chutes for waste fractions. Several cities have experimented with systems that collect organic wastes by the sewage system. By using a grinder, kitchen waste can be flushed into the sewage system, which in general produces biogas by the fermentation of sewage sludge. This is only a good option if the sewage is separated from the city drainage system, otherwise it might create water pollution. Another option might be to use grinders, that store the organic waste in a tank. This tank could be emptied regularly by a collection truck. Clearly, the preferred option depends on local conditions and culture. Besides, the density of the area, the type of sewage system and its biogas production, and the facilities that are already in place for organic waste collection are important parameters. In the paper, we will discuss the costs and benefits of future organic waste options and by discussing The Hague as an example.
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This is a repository containing an agent-based model (code, data, documents and results) of Industrial Symbiosis Network implementation. The repository is related to the publication:Lange, K.P., Korevaar, G., Nikolic, I., Herder, P.M., 2021. Actor Behaviour and Robustness of Industrial Symbiosis Networks: An Agent-Based Modelling Approach, 2020:64:4. JASSS. https://doi.org/10.18564/JASSS.4635The purpose of the model is to explore the influence of actor behaviour, combined with environment and business model design, on the survival rates of Industrial Symbiosis Networks (ISN), and the cash flows of the agents. We define an ISN to be robust, when it is able to run for 10 years, without falling apart due to leaving agents.The model simulates the implementation of local waste exchange collaborations for compost production, through the ISN implementation stages of awareness, planning, negotiation, implementation, and evaluation.One central firm plays the role of waste processor in a local composting initiative. This firm negotiates with other firms to become a supplier of their organic residual streams. The waste suppliers in the model can decide to join the initiative, or to have the waste brought to the external waste incinerator. The focal point of the model are the company-level interactions during the implementation or ending of synergies.The model consists of three types of actors, waste suppliers, processor, and incinerators. The modeled waste supplier and processor are part of the ISN. In the model these agent types negotiate and evaluate the outcomes by means of the Theory of Planned Behavior. The modeled incinerator is part of the external environment. This agent acts as the infinite sink of all waste flows, taking up op the waste that is not used in the local composting initiative.
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Industrial Symbiosis Networks (ISNs) consist of firms that exchange residual materials and energy locally, in order to gain economic, environmental and/or social advantages. In practice, ISNs regularly fail when partners leave and the recovery of residual streams ends. Regarding the current societal need for a shift towards sustainability, it is undesirable that ISNs should fail. Failures of ISNs may be caused by actor behaviour that leads to unanticipated economic losses. In this paper, we explore the effect of these behaviours on ISN robustness by using an agent-based model (ABM). The constructed model is based on insights from both literature and participatory modelling in three real-world cases. It simulates the implementation of synergies for local waste exchange and compost production. The Theory of Planned Behaviour (TPB) was used to model agent behaviour in time-dependent bilateral negotiations and synergy evaluation processes. We explored model behaviour with and without TPB logic across a range of possible TPB input variables. The simulation results show how the modelled planned behaviour affects the cash flow outcomes of the social agents and the robustness of the network. The study contributes to the theoretical development of industrial symbiosis research by providing a quantitative model of all ISN implementation stages, in which various behavioural patterns of entrepreneurs are included. It also contributes to practice by offering insights on how network dynamics and robustness outcomes are not only related to context and ISN design, but also to actor behaviour.
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This research analyses the current self-reported level of proficiency of environmental skills, the required future level of proficiency, and the gaps between them. Given the increasingly urgent need for the tourism industry to take action to support environmental management practices, this research provides evidence of key environmental skill gaps. Mixed methods research is applied where the sample includes 1404 respondents to a questionnaire and 264 interviewees from senior management of organisations from five tourism sectors (accommodation establishments, food and beverage outlets, destination management organisations, tour operators and travel agents, visitor attractions) in eight European countries. Analysis of variance, t-tests, correlation and cluster analyses, and Pearson Chi-square tests were employed for data analysis. The findings revealed that the country of registration, the size and the tourism sector type influence significantly the current and future proficiency levels of environmental skills, and the gaps between them. Most respondents did not receive environmental skills training. Theoretical, managerial and policy implications are also discussed.
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This article aims to uncover the processes of developing sustainable business models in innovation ecosystems. Innovation ecosystems with sustainability goals often consist of cross-sector partners and need to manage three tensions: the tension of value creation versus value capture, the tension of mutual value versus individual value, and the tension of gaining value versus losing value. The fact that these tensions affect all actors differently makes the process of developing a sustainable business model challenging. Based on a study of four sustainably innovative cross-sector collaborations, we propose that innovation ecosystems that develop a sustainable business model engage in a process of valuing value in which they search for a result that satisfies all actors. We find two different patterns of valuing value: collective orchestration and continuous search. We describe these patterns and the conditions that give rise to them. The identification of the two patterns opens up a research agenda that can shed further light on the conditions that need to be in place in order for an innovation ecosystem to develop effective sustainable business models. For practice, our findings show how cross-sector actors in innovation ecosystems may collaborate when developing a business model around emerging sustainability-oriented innovations.
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Symbiotic Urban Agriculture Networks (SUANs) are a specific class of symbiotic networks that intend to close material and energy loops from cities and urban agriculture. Private and public stakeholders in SUANs face difficulties in the implementation of technological and organisational design interventions due to the complex nature of the agricultural and urban environment. Current research on the dynamics of symbiotic networks, especially Industrial Symbiosis (IS), is based on historical data from practice, and provides only partly for an understanding of symbiotic networks as a sociotechnical complex adaptive system. By adding theory and methodology from Design Science, participatory methods, and by using agent-based modelling as a tool, prescriptive knowledge is developed in the form of grounded and tested design rules for SUANs. In this paper, we propose a conceptual Design Science method with the aim to develop an empirically validated participatory agent-based modelling strategy that guides sociotechnical design interventions in SUANs. In addition, we present a research agenda for further strategy, design intervention, and model development through case studies regarding SUANs. The research agenda complements the existing analytical work by adding a necessary Design Science approach, which contributes to bridging the gap between IS dynamics theory and practical complex design issues.
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Het boek ‘3D Printing with biomaterials’ introduceert een manier om een duurzame en circulaire economie te realiseren; 3D printen gecombineerd met het gebruik van biomaterialen.
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Dit rapport is onderdeel van het project 'Bokashi: naar een betere onderbouwing en documentatie voor de praktijk' en het resultaat van het onderzoek dat is uitgevoerd binnen Werkpakket 3: 'Economische Waarde'. In dit werkpakket zijn de duurzaamheidsaspecten (economisch, sociaal en ecologisch) van organische stromen en het verwerken tot bodemverbeteraars nader gekwantificeerd, waarbij wij ons richtten op bokashi (gefermenteerde organische reststromen) en compost. Om het onderzoek zoveel mogelijk aan te laten sluiten bij de praktijk is ervoor gekozen om een kosten-baten analyse uit te voeren aan de hand van een concrete casus met een concrete vraag: het regionaal recyclen van organische stromen van de Reinigingsdienst (RD) Maasland. RD Maasland heeft als ambitie om in de komende jaren de organische stromen op regionaal niveau te recyclen en daarmee bij te dragen aan vitalisering van de bodem door het verhogen van het gehalte organische stof. Daarvoor kan de dienst zich richten op het toepassen van compost of bokashi. In het onderzoek hebben we daarom de toepassingsmogelijkheden van compost en bokashi naast elkaar gezet. Het rapport begint met een algemene beschouwing van praktijkervaringen met bokashi als potentieel alternatief voor compostering. Vervolgens wordt aan de hand van de casus RD Maasland ingegaan op de huidige organische stromen en de bewerking daarvan in een deelgebied van RD Maasland en worden de kosten en baten doorgerekend van de huidige ketens ten opzichte van alternatieve ketens met regionale bewerking. Daarbij richten wij ons op bermmaaisel/ bladeren en de productie van compost en bokashi voor de verbetering van de bodemvitaliteit. Ter inspiratie volgt een beschrijving van regionale bewerking van stromen door een samenwerking van gemeentes en agrariërs in Friesland. Daarna volgt een concluderende paragraaf, waarin een mogelijk pad wordt geschetst voor de ontwikkeling van circulair terreinbeheer in het werkgebied van de reinigingsdienst Maasland gebaseerd op economische en andere duurzaamheidsaspecten. Het rapport sluit af met een reflectie op de opschalings- en toepassingsmogelijkheden elders in Nederland.
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Publicatie naar aanleiding van de door Stadslab European Urban Design Laboratory georganiseerde Master Class met als thematiek het ontwerpen van een Innovative District voor de Poolse stad Lublin. De Master Class werd gevolgd door 8 internationale deelnemers en stond onder supervisie van Didier Rebois (Europan, Parijs), Marc Glaudemans (Fontys) en Juliette van der Meijden (Fontys)
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Closed loop or ‘circular’ production systems known as Circular Economy and Cradle to Cradle represent a unique opportunity to radically revise the currently wasteful system of production. One of the challenges of such systems is that circular products need to be both produced locally with minimum environmental footprint and simultaneously satisfy demand of global consumers. This article presents a literature review that describes the application of circular methodologies to education for sustainability, which has been slow to adopt circular systems to the curriculum. This article discusses how Bachelor and Master-level students apply their understanding of these frameworks to corporate case studies. Two assignment-related case studies are summarized, both of which analyze products that claim to be 'circular'. The students' research shows that the first case, which describes the impact of a hybrid material soda bottle, does not meet circularity criteria. The second case study, which describes products and applications of a mushroom-based material, is more sustainable. However, the students' research shows that the manufacturers have omitted transport from the environmental impact assessment and therefore the mushroom materials may not be as sustainable as the manufacturers claim. As these particular examples showed students how green advertising can be misleading, applying “ideal” circularity principles as part of experiential learning could strengthen the curriculum. Additionally, this article recommends that sustainable business curriculum should also focus on de-growth and steady-state economy, with these radical alternatives to production becoming a central focus of education of responsible citizens. https://doi.org/10.1016/j.jclepro.2019.02.005 LinkedIn: https://www.linkedin.com/in/helenkopnina/
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