Day 2 :
Natural Resources Institute Finland, Finland
Time : 09:00-09:30
Sirpa Kurppa is a specialist in the ecology of food production systems. She has wide-ranging science experience from more than 30 years, and has provided expert input into EU Rural Foresight studies and into work of the Committee for the Future of the Finnish Parliament, into the National Food Strategy and into the Strategy for Sustainable Consumption and Production. She attended preparing a proposal on green growth for the Finnish Parliament and preparing the Finnish strategy for bioeconomy. From 2013-2015, she was a member in the EU Bioeconomy Panel, and from 2014 a member of the National Nutrition Council.
Accelerated cycling of nutrients is principally due to three changes in the global food system: Increase in population, changes in diet towards more phosphorous (P) and nitrogen (N) intensive products, and industrialization of agriculture. Methodology nutrient footprint takes into account 1) the amount of nutrients taken into use as virgin or recycled nutrients and 2) the efficiency of these nutrients utilized in the particular production chain. At the same time, nutrient losses at each life cycle phase are identified. Hence, the nutrient footprint is an indicator, which combines the amount of captured nutrients, kg of N and P, for use in the production chain and the share of nutrients utilized % either in the primary product itself or in the entire production chain, accounting also for secondary products. The nutrient footprint methodology seems to have potential in assessing the nutrient balances of food chains as well other bio-based production chains. It offers information about the nutrient usage and utilization efficiency in a simple and comparable form. The definition of the hot spots of nutrient leakage of the entire food chain, in order to be able to close them, is essential to determine in transition towards sustainable nutrient economy and proper nutrient performance. The food chain can be remarkably improved with of the Nutrient Footprint-tool by improving the efficiency of nutrient use of the whole chain or the part of the chain. The results can be adapted as general view of nutrient management in communication with consumers and politicians.
The Hong Kong University of Science and Technology, China
Time : 09:30-10:00
Irene M C LO is currently a full Professor in the Department of Civil and Environmental Engineering at the Hong Kong University of Science and Technology. She is an elected Academician of the European Academy of Sciences and Arts, Fellow of the Hong Kong Institution of Engineers, and Fellow of the American Society of Civil Engineers. She received her PhD degree in Civil (Environmental) Engineering from the University of Texas at Austin in 1992. She has held 2 patents, edited 7 technical books, and published over 260 SCI journal articles and conference papers with citations about 4500 and H-index of 35.
To tackle the food waste issue in Hong Kong, a framework of food waste collection and recycling for food waste valorization is proposed. The framework consists of a simple food waste separation and collection process involving less behavioral change of residents and food waste recycling for renewable biogas fuel production. Food waste can be packed in an optic bag (i.e., green bag), while the residual municipal solid waste (MSW) can be packed in a common plastic bag. All the wastes are then sent to the refuse transfer stations, in which food waste is separated from the residual MSW using an optic sensor. The optic sensor can achieve a separation efficiency of food waste and residual MSW as high as 98%. The collected food waste is then sent to the proposed Organic Waste Treatment Facilities for biogas production via anaerobic digestion technology. The biogas (with methane content of 50-70% by volume) can be upgraded using water scrubbing technology and valorized as a biogas fuel for vehicle use (with methane content of 98% by volume). The application of biogas vehicle fuel from food waste has been widely adopted by some countries such as Sweden, Norway, and France. By converting 1,080 tonnes per day of food waste into biogas fuel as a petrol substitute for vehicle use in Hong Kong, it is estimated to fuel around 12,000 passenger cars per day, equivalent to about 2.6% of registered passenger cars in Hong Kong. In addition, it reduces about 1.9% of greenhouse gas (GHG) emissions in the transport sector. This percentage reduction is higher than the percentage reduction of GHG emissions for the transport sector in Hong Kong in 2010 with reference to the year 2005.
Lille North of France University, France
Keynote: E-BABE- From waste CRT glasses to foam glass: a case of study to re-use electric and electronic end of life materials
Time : 10:00-10:30
Francois O. Méar has completed his PhD at the age of 29 years from Montpellier II University and postdoctoral studies from Cambridge and Tohoku University. He is assistant professor at Lille I University and specificly in the Catalysis and Solid State Chemistry Unit. FOM is working on the formulation of glass matrices for unconventional applications (e.g. containment matrices for nuclear waste, seals glass for SOFC) and on the synthesis of self-healing glassy matrices. He has published more than 35 papers in reputed journals, 1 patent and 2 book chapters.
Necessity of recycling industrial wastes figures among daily environmental and economic priorities. Glass is known as an "eternal" recyclable material. Generally, glass cullet is re-used in the container and window glass industry. For cathode ray tube (CRT) glass, the situation is different. This work is devoted to search of possible applications for waste cathode-ray tubes (CRTs) glasses. Heavy elements contained in the glasses are required be buried land field by producers and recyclers of CRT’s.rnFoam glass seems to be the most promising for waste CRT glasses recycling. Today, commercial foam glasses are used for thermal and acoustic insulation applications resulting of their porous structure. The foam glass is obtained after heat treatment of a powder mixture of the CRT glass and reducing agent such as titanium nitride or silicon carbide. The basic principle of foam glass manufacture is to generate a gas, by reaction with the reducing agent. The gas expands thus producing a structure of cells to form a porous body.
Time : 10:45-11:05
Gary Leeke is Chair in Chemcial Engineering and Head of the Bioenergy and Resource Management Centre at Cranfield University, UK. His research interests lie in the areas of recycling enabling technologies and resource efficiency. He has expertise in high pressure engineering and thermo-chemical processing, specifically in reaction engineering, separation technology, flow reactors, and their applications to polymer/composite processing and remanufacture, mixed plastic waste and the circular economy. He leads the EXHUME project in the UK investigating the deconstruction of fibre reinforced composites. Gary sits on the Composites Leadership Forum Sustainability Working Group for Composites UK
With the ever increasing use of carbon fibre reinforced composites (CFRCs), there is growing concern regarding the level of waste the industry is expected to produce. Approximations vary, but some estimates state the demand will increase by up to 10%per year from 78 kt in 2014 to 150 kt in 2020. In addition to various products reaching end-of-life, there is also the necessity to dispose of waste generated from the manufacturing process, which can be up to 40% of all the material needing reprocessing. Despite being a relatively cheap disposal method at £82.60 per tonne in the UK, landfilling waste is the least preferred option and is already outlawed in Germany with other countries expected to follow suit. Commercial recycling technologies for CFRCs focus on the use of pyrolysis but do not effectively close the loop due to the loss of the polymer matrix which is typically about 50 wt.%. Chemical recycling (solvolysis) uses an appropriate solvent to depolymerise the resin and release the fibres and eventually, the fillers or inserts. This approach enables the recovery of monomers and other chemicals from the resin and high-quality fibres. In this presentation the viable recycling methods are presented and discussed, together with their LCA. Demonstrator products manufactured from fibres recovered after a solvolysis recycling process are presented, in particular materials with randomly distributed carbon fibre tows and materials with realigned carbon fibre tows, of which the mechanical properties were measured. The results are discussed in relationship with the material structure and composition.