It is hard to grasp the true scale of food waste in Sweden. Chalmers researcher Kristina Liljestrand uses an illustration of 23,000 trucks lined up in a row – filled with all the unnecessary food waste from producers, retailers and households each year. If you wanted to take a walk past all of the trucks, you would need a good pair of walking shoes because you would cover 430 kilometres.
“The amount of food that is thrown away nowadays is incredible. Most food waste comes from consumers, but the amount lost in the logistics systems comes in a close second. By tweaking the logistics systems, we can ensure that the food maintains good quality and lasts as long as possible when it reaches the store,” she says
Unique research on food waste in the logistic systems
This is where Kristina Liljestrand's research comes into play. In recent years, she has figured out how companies in the food supply chain can work to reduce their environment impact in terms of both food waste and emissions from transports.
Her work is unique in many ways since logistics improvement actions to combat the waste problem is a relatively unexplored area. There is no overview of ways that the companies in the supply chain can reduce waste – but this is something that Kristina delivers in her doctoral thesis.
“The logistics systems are what bind everything together, from production of the food products to the products sitting on the store shelves. We need to understand how to work here to reduce food waste,” she says.
"By tweaking the logistics systems, we can ensure that
the food maintains good quality and lasts as long as possible when it
reaches the store"
Through an extensive study among Swedish producers, wholesalers and retailers, she has identified nine improvement actions.
“I describe the improvement actions, the logistics activities, and what players are involved. The compilation can be seen as a buffet for those who want to work to reduce food waste,” she says.
Collaboration is necessary for sustainable solutions
An important conclusion is that collaboration throughout the food supply chain is crucial.
“Several stages of the food chain are involved when it comes to waste, making it hard for a single company working alone to reduce it. Collaboration is necessary to create effective systems that span from beginning to end so that the food products reach the stores in time,” she says.
In the second part of her research, Kristina reviewed how the environmental impact from transports in the food logistics system can be reduced. By looking at aspects such as load factor (how well the space in/on pallets, crates and trucks is utilized) and the proportion of intermodal transports (where road transport is combined with rail or sea transport), she identified which shipments are most effective to work with, and the best way of doing this.
This resulted in two frameworks that provide great help in the quest to reduce transport emissions.
“Many logistics systems are extremely large and complex, and it can be hard to know where to begin. The frameworks that I developed give companies tools that enable them to see what factors in their logistics systems affect transport emissions,” she says.
Reduced environmental impact means reduced costs
Kristina has also incorporated an economic perspective in that her research also shows what savings can be made through the various measures. One thing is clear – there is money to be made by increasing the load factor and focusing more on intermodal transport.
“If you work to reduce environmental impact, you often also reduce your costs,” she says.
Text: Ulrika Ernström
FACTS, RESEARCH AND MORE INFORMATION
Food waste reaches from Gothenburg to Södertalje
Chalmers researcher Kristina Liljestrand uses a graphic illustration to describe the true scale of the annual food waste in Sweden. With 23,000 trucks lined up in a row - filled with all the
unnecessary food waste from producers, retailers and households each
year - you would have to walk almost 430 kilometres to pass them all. It corresponds to the distance between Gothenburg and Södertälje.
About Kristina Liljestrand
Food waste in Sweden
• In 2012, 1.2 million tonnes of food was thrown away in Sweden. About half, 622,000 tonnes, was unnecessary food waste – food that could have been eaten if handled differently. This equates to 65 kilograms of unnecessary food waste per person each year.
• The majority of the unnecessary food waste comes from households, but a lot of food also disappears in the logistics chain as it makes its way to the consumers. In 2012, households accounted for just under half (270,000 tonnes) of the unnecessary food waste. In the logistics systems – from industrial production until the food products leave the store shelves – 234,000 tonnes of food disappeared unnecessarily. The remaining 118,000 tonnes made their way to restaurants and industrial kitchens.
• Production of the amount of food discarded each year is equivalent to about 2 million tonnes of carbon dioxide emissions, which is about 3 percent of the total greenhouse gas emissions in Sweden.
Food waste in EU
• In 2012, the estimated amount of food waste in the EU was 88 million tonnes (including both edible food and inedible parts associated with food). This equates to 173 kilograms of food waste per person, and it means that we are wasting about 20 percent of the total food produced.
• The costs associated with food waste in the EU in 2012 were estimated at around 143 billion euros.
• The households are contributing the most to food waste. 2012 the households accounted for 47 million tonnes - or 53 percent – of the total amount of food waste. But there are also a lot of food waste in the logistics chain on the way out to the consumers. The processing sector, together with the wholesale and retail sector, accounted for 24 percent of the total amount of food waste in 2012.