Environmental concerns and urbanization pressures are driving demand for more efficient reverse logistics in city environments, where space constraints and dense populations create unique challenges. Polyurethanes (PU), used widely in insulation, electronics, and automotive industries, are integral to circular supply chain discussions due to their low recycling rates. This study emphasizes the challenges of urban reverse logistics for the disposal and collection of refrigerators in countries with different waste management systems. In the paper qualitative and quantitative methods have been applied. Based on the research carried out, it was shown how complex the reverse logistics process is in the city concerning waste such as fridges. It is influenced by, among other things, regulations at EU and national level, cooperation between stakeholders, consumer awareness and education, and real-time access to information on waste.
DOCUMENT
Implementing circular urban supply chains is a major economic transformation that can only work if significant coordination problems between the actors involved are solved. This requires, on the one hand, the implementation of efficient urban collection technologies, where process industries collaborate hand-in-hand with manufacturers and urban waste treatment specialists and are supported by digital solutions. On the other hand, it also requires implementing regional ecosystems connected by innovative CO2-neutral circular city logistics systems smoothly and sustainably managing the regional flow of resources and data, often at large-scale and with interfaces between industrial processes and private and public actors. Develop blueprint for circular urban region This research project aims to develop a blueprint for circular urban regions, including the demonstration of a territorial cross-sectorial, large-scale and sustainable systemic solution for the circularity of high-performance plastics from diverse applications of rigid polyurethane (PU) foams used as insulation material in refrigerators and construction elements. The research project develops a blueprint for regional participative governance using an approach involving multiple actors from the public-, private-, academic-, and financial sectors and civil society (by working in living labs).The focus of the presentation (and paper) is on the control tower elements of the circular urban supply chain and the elements to make the collaboration work.In terms of urban logistics and collection services is to make these materials accessible for downstream sorting and recycling processes for the first time in a sustainable and economically viable way. The project will develop a new way of processing defined waste streams like appliances (refrigerators), to separate chemically recyclable PU from a mixed plastics waste stream.
DOCUMENT
About 35-40 kton used mattresses available yearly for the recycling only in the Netherlands. Mattresses that are offered at recycling companies, municipal yards and retailers often find their way to incinerators. However, several fraction components of used mattresses can be reused/resale in a useful manner. One of the mattress fractions is textile cover with residue of Polyurethane (PU) foam. Effective removal of PU foam would enable further reuse of textile materials. Use of harsh chemicals/ thermo-, photo-, oxidative, processes including hydrolysis, aminolysis, phosphorolysis, glycolysis etc [1,2] for PU foam degradation is not a good solution, since it will cause non-specific damage to textiles and other parts, making recycle/ reuse difficult. Therefore, Mattress Recycling Europe BV (MRE) is looking for an eco-friendly mild process for selective degradation of PU foam component. PU is a mixed polymer; therefore, it is important to establish the physio-chemical nature of PU before identifying suitable and sustainable degradation route. The proposed solution is selective degradation of PU polymer using biotechnology. Enzymatic bio-catalysis enables a targeted, specific reaction at mild process conditions (pH, temperature) without harming other components in the process. Primarily hydrolase class of enzymes is assumed to be among the most effective options for the proposed degradation of PU foam residue [3,4]. From previous research, adding mechanical shear provides a synergistic effect for enzyme catalysed reaction [5-7]. Therefore, within the scope of this exploratory practice-oriented project, technical feasibility of bio-catalyst and shear (including well established PU degradation techniques) towards the selective degradation of PU foam residue attached to textile part from used mattresses will be explored together with cost estimation of the overall process and re-usability of enzymes using suitable immobilisation technique, addressing an urgent industrial need in the field of green chemistry.
Mattresses for the healthcare sector are designed for robust use with a core foam layer and a polyurethane-coated polyester textile cover. Nurses and surgeons indicate that these mattresses are highly uncomfortable to patients because of poor microclimatic management (air, moisture, temperature, friction, pressure regulation, etc) across the mattress, which can cause pressure ulcers (in less than a day). The problem is severe (e.g., extra recovery time, medication, increased risk, and costs) for patients with wounds, infection, pressure-sensitive decubitus. There are around 180,000 waterproof mattresses in the healthcare sector in the Netherlands, of which yearly 40,000 mattresses are discarded. Owing to the rapidly aging population it is expected to increase the demand for these functional mattresses from 180,000 to 400,000 in the next 10 years in the healthcare sector. To achieve a circular economy, Dutch Government aims for a 50% reduction in the use of primary raw materials by 2030. As of January 1, 2022, mattress manufacturers and importers are obliged to pay a waste management contribution. Within the scope of this project, we will design, develop, and test a circular & functional mattress for the healthcare (cure & care) sector. The team of experts from knowledge institutes, SMEs, hospital(s), branch-organization joins hands to design and develop a functional (microclimate management, including ease of use for nurses and patients) mattress that deals with uncomfortable sleeping and addresses the issue of pressure ulcers thereby overall accelerating the healing process. Such development addresses the core issue of circularity. The systematic research with proper demand articulation leads to V-shape verification and validation research methodology. With design focus and applied R&D at TRL-level (4-6) is expected to deliver the validated prototype(s) offering SMEs an opportunity to innovate and expand their market. The knowledge will be used for dissemination and education at Saxion.
This proposal is a resubmission of an earlier proposal (Dossier nr: GOCH.KIEM.KGC02.079) which was not approved because of the too ambitious planning. As advised by the commission, the focus is kept only on the recycling of the mattress cover. The Netherlands has 180,000+ waterproof mattresses in the healthcare sector, of which yearly 40,000+ mattresses are discarded. Owing to the rapidly aging population it is expected to increase the demand for these waterproof mattresses in the consumer sector as well. Considering the complex nature of functional mattresses, these valuable resources are partly incinerated. To achieve a circular economy, Dutch Government aims for a 50% reduction in the use of primary raw materials in five key economic sectors including ‘consumer products’ by 2030. Within the scope of this research, Saxion together with partners (CFC BV, Deron BV, MRE BV & Klieverik Heli BV) will bring emphasis on Recycling (sustainable chemistry) of mattress covers. Other aspects such as reuse and re-designing are beyond the scope of this project proposal, for which a bigger consortium will be built during the course of this project. A case under study is a water-impermeable mattress cover made of 100% polyester with polyurethane (PU) coatings. The goal is to enable the circular use of textiles with (multilayer) ‘coatings’, which are not recyclable yet. These ‘coatings’ comprise functional coatings as well as adhesion layers. Therefore, novel triggerable molecular systems and the corresponding recycling processes will be developed. The coatings will be activated by a specific trigger (bio)-chemical solvation, heat, pressure, humidity, microwave, or combination of thereof. The emphasis is to develop a scalable coating removal process. Learnings will be used to build larger (inter)-national consortia to develop multiple industry closed-loop solutions required for 100% mattress circularity with desired functionality. The generated knowledge will be used for education at Saxion.
