Zoekresultaten

Best practices solid urban waste management: Cooperation & consortium development

In June 2016, two Dutch SME companies which are active in the area of urban solid waste management approached the International Environmental Sciences department of Avans about the current R&D activities on urban solid waste management in cooperation with the Federal University of Minas Gerais (UFMG) Brazil. The companies had interest in developing activities in Brazil, since they are aware of the great potential for exporting both knowledge and technology. Solid waste poses a major problem in Brazil which affects 200 million residents. The Brazilian municipalities collect around 71 million tons solid municipal waste on a yearly basis and only a tiny percentage of this collected waste gets recycled. As such. the overwhelming majority of the collected urban solid waste goes to landfills. Within the State of Minas Gerais there are 850 towns of which 600 have less than 20.000 residents and are agriculturally oriented. Current organic waste composting practices take place under very poor conditions (pathogens and weeds still remain in the compost) and most often the resulting compost product is not well received by its residential and agricultural consumers. As such there is huge room for improvement. The SME companies work with Avans and UFMG to address these challenges. The joint research team consisting of the two Dutch SME companies and the two Research and educational institutes have defined the following research question: What is the current status of organic solid waste management in Minas Gerais and how can cooperation between Brazil and the Netherlands result in a win-win for both countries? Two individual KIEM VANG proposals have been defined in order to address these challenges. The planned activities are a joint effort with professor R. T. de Vasconcelos Barros of the Universidade Federal de Minas Gerais (UFMG) and are executed within the Living Lab Biobased Brazil program (www.biobasedbrazil.org).

Building on Mycelium

The climate change and depletion of the world’s raw materials are commonly acknowledged as the biggest societal challenges. Decreasing the energy use and the related use of fossil fuels and fossil based materials is imperative for the future. Currently 40% of the total European energy consumption and about 45% of the CO2 emissions are related to building construction and utilization (EC, 2015). Almost half of this energy is embodied in materials. Developing sustainable materials to find replacement for traditional building materials is therefore an increasingly important issue. Mycelium biocomposites have a high potential to replace the traditional fossil based building materials. Mycelium is the ‘root network’ of mushrooms, which acts as a natural glue to bind biomass. Mycelium grows through the biomass, which functions simultaneously as a growth substrate and a biocomposite matrix. Different organic residual streams such as straw, sawdust or other agricultural waste can be used as substrate, therefore mycelium biocomposites are totally natural, non-toxic, biological materials which can be grown locally and can be composted after usage (Jones et al., 2018). In the “Building On Mycelium” project Avans University of Applied Sciences, HZ University of Applied Sciences, University of Utrecht and the industrial partners will investigate how the locally available organic waste streams can be used to produce mycelium biocomposites with properties, which make them suitable for the building industry. In this project the focus will be on studying the use of the biocomposite as raw materials for the manufacturing of furniture or interior panels (insulation or acoustic).

Circulaire havenslib: optimalisatie laagdikte van slib voor duurzame kleiproductie

Zand en andere grove grondstoffen worden steeds schaarser door intensief gebruik in infrastructuur en industrie, terwijl miljarden kubieke meters slib wereldwijd worden uitgebaggerd om vaargeulen en havens operationeel te houden. Vanwege dit groeiende tekort aan traditionele grondstoffen is er behoefte aan het ontwikkelen van nieuwe methodieken voor hergebruik van slib en lokaal sediment, onder andere voor dijkversterking en ophoging van landbouwgronden. Echter wordt gebaggerd slib volgens de regelgeving nog als een van de grootste potentiële afvalstromen gezien. Ook is slib complexer in het gebruik omdat het bestaat uit een heterogeen mengsel van onder meer water, zand, organisch materiaal, fijnstof en gas. Vanwege schaarste in bouwmaterialen lopen er steeds meer initiatieven voor het nuttig hergebruiken van gebaggerd slib, maar de optimale laagdikte en aanlegtechnieken moeten nog worden onderzocht. Met dit project zoeken lectoraat Sustainable River Management samen met Hogeschool Van Hall Larenstein en de praktijkpartners Klaei B.V., Waterschap Noorderzijlvest en EcoShape naar de best practices voor het produceren van waardevol klei uit havenslib. Via laboratoriumexperimenten en veldproeven binnen grootschalige pilots worden mechanische eigenschappen van havenslib uit de Lauwersoog haven in beeld gebracht. Er wordt gezocht naar de optimale dikte van havenslib om bruikbare klei te produceren. Daarbij wordt onderzocht of de mechanische eigenschappen van de geproduceerde klei afhankelijk zijn van de laagdikte van de initiële laag of havenslib. De resultaten verbinden de laagdikte in rijpingscompartimenten met materiaaleigenschappen en monitoren de initiële verouderingsprocessen na de aanleg van de klei in een proefdijk. Het eindresultaat biedt inzicht in de best practices voor toepassing van havenslib en de daarbij horende materiaaleigenschappen. Dit project draagt daarmee direct bij aan de ontwikkeling van een nieuw, duurzaam materiaal voor gebruik in dijkversterkingen en landbouw en een circulaire economie in Nederland in 2050.

Circular Park Can Tho

This project entails a feasibility study to assess the possibility of creating an open-access, community-based makerspace in the Vietnamese city of Can Tho. The aim of the project is to kickstart the community based circular economy by utilizing residual flows from the plastic catching process. Plastic catchers trap both plastic and biomass that will be converted into new products to strengthen both the local economy and providing Dutch SME-company Orange Star Solutions with the necessary raw materials to convert into produce. The project will make use of a plot of land bordering the Song Can Tho river. The owner proposed that the plot of land could be used in a way to generate income, preferable in a way that would show environmental awareness. This could be done by using the vast amounts of (in)organic waste that is littering the environment. The collection of the waste is mainly done by local waste pickers. The waste pickers, part of the informal economy, could unleash their full potential if there is a physical location where waste is upcycled and sold, circumventing the bury, burn or bale-and-export economy. The extracted plastic will be converted into pans, cups, pots and crockery. The biomass, predominantly water hyacinth, will serve as one of the ingredients for compost hence, reducing the reliance on chemical fertilizers.

COLOUR REMOVAL FROM RECYCLED PLASTIC (confidential)

In Europe we consume 50 million tonnes of plastic a year. The use of plastic has increased fiftyfold in fifty years and the growth continues. Collecting and recycling plastic is thus essential to avoid the pollution of the land and sea. However, generally, post-consumer plastics have very low recycling rates, at present only 7% of plastic used in Europe comes from recycled polymers. Polyethylene terephthalate (PET) is one of the most recycled materials; in 2017 more than 57% of PET bottles were recycled in Europe, used in both packaging and fibre applications. Especially transparent PET bottles have high collecting and recycling rates over Europe. However, the plastics have very different value depending on their colour. If the plastic is even very lightly coloured, the plastic will lose a large percentage of its value. Decolouring plastic is complicated and currently no efficient and economically viable system exists. FT Innovations, a SME with the core-expertise in extraction, sees potential in developing a sustainable decolouration process with a new extraction technology, which offers significant potential in replacing hazardous, relatively expensive and environmentally damaging organic solvents that are currently used on decolouration. Avans has relevant expertise in both (biobased) plastic colourants and the extraction techniques as demonstrated in previous projects, and therefore FT innovations approached Avans with the request to assist in the feasibility study. The consortium is further strengthen by CCT Oss with their strong industrial know-how of colourants and their use in plastics and Plastic Company with their core activity on recycling of PET and other plastic materials.

Combining metabolic labeling and photopharmacology to combat tuberculosis