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UK should stop plans to ramp up use of ‘industrially’ compostable packaging, MPs warn.

Compostable plastic packaging has been criticised by a committee of MPs

The use of ‘industrially’ compostable packaging should not be promoted in the UK because the waste management infrastructure to deal with it is ‘not fit for purpose’, a committee of MPs has warned.

Much of the compostable packaging produced for the UK market only degrades in industrial composting facilities in specific industrial conditions, rather than in home composting – but not all is sent to these facilities. Industrial composting conditions require “elevated temperatures (55-60°) combined with a high relative humidity and the presence of oxygen”.

In its latest report on plastic food and drink packaging, UK’s Environment, Food and Rural Affairs Committee stated: “Although industrially compostable plastic packaging is appealing as an alternative to conventional plastics, the general waste management infrastructure to manage it is not yet fit for purpose.

“In addition, we are concerned that consumers are confused about how to dispose of compostable packaging, particularly if there is no dedicated compostable waste bin available. This could result in contamination of dry recycling as well as littering. We therefore don’t support a general increase in the use of industrially compostable packaging at this stage.”

However, it went on to state that industrially compostable packaging could play a role in closed loop environments, such as sporting events and workplace with catering facilities, where there is a dedicated disposal and collection service.

The news comes as the use of alternatives to fossil fuel-based plastic are being adopted by many food and drink companies, cafes, takeaway coffee venues, cafes and retailers.

Overall, experts that gave evidence to EFRA echoed the committee’s concerns over industrially compostable packaging.

‘Problem to marine life’

Sarah Greenwood, packaging technology expert at the University of Sheffield, said: “There is a perception with compostable packaging that it turns into compost, but it does not. It turns into carbon dioxide, water or methane with a tiny amount of biomass left behind.”

Environmental NGOs told the committee that the rapid introduction of such alternatives could actually increase plastic pollution.

Juliet Phillips, ocean campaigner of the Environmental Investigation Agency, said: “If a biodegradable cup gets into the sea, it could pose just as much of a problem to marine life as a conventional plastic cup.”

Trade body the Environmental Services Association highlighted that “there are a number of barriers to ensuring compostables work effectively with the waste management system and actually offer an environmental benefit”. The organisation said that industrially compostable packaging should be “sent to an In-Vessel Composting facility (IVC)”.

However, the Government’s “preferred option for treating food waste is anaerobic digestion (AD), meaning that the infrastructure portfolio will move increasingly in that direction and away from IVC”, the ESA added. The trade body went on to say that compostable packaging “is not currently processed by AD plants, and so operators will seek to extract it as they do with plastic contamination, and send it to energy from waste or landfill”.

However, not all the experts who gave evidence to EFRA’s report were critical of compostable packaging and gave praise to the material.

Vegware (@vegware), a compostable packaging manufacturer, stated that “where suitable composting is not possible, we advise people to put our products in general waste”. Vegware  also stated that “the benefits of choosing lower carbon, renewable, recycled or reclaimed materials apply no matter what happens to them after use” and stated that studies showed that incineration of their products “produces more heat than newspaper, wood or food waste”, which is beneficial when producing energy from waste, and that “it produces no volatile gases and leaves little residue”. It added that “in landfill, studies show that compostable packaging and does not give off methane”.

The Bio-Based and Biodegradable Industries Association (BBIA) has stated that compostable materials are an “answer to specific packaging challenges and could substitute around 5-8% of current plastic packaging”.

Misunderstood material

In a statement, published after the release of EFRA’s report, the BBIA criticised EFRA’s stance on compostable packaging.

The BBIA said: “The EFRA committee has shown how there is an attempt to stop the introduction of compostable plastics in certain uses, totally overlooking that compostable plastics are instrumental in improving food waste quality and the quantity intercepted.

“Yet we all know that the current waste and resource management systems are totally broken. DEFRA has itself said so. Recycling markets have said so. Litter throughout our towns and countryside say so. Our plastic and WEEE waste dumped in Africa, Malaysia, Indonesia, India and Vietnam say so. Our exports of three million tons a year of RDF say so. Our falling recycling levels say so. Our soils and waters full of plastics say so.

“Despite this many don’t want change. They prefer to fiddle around the edges while watching our Planet burn and pollution from waste invading every corner of the globe.

“We have never argued that compostables are a substitute for most plastic packaging. If you read our responses to DEFRA ( we suggest compostables are useful where they can a) help intercept and improve food waste collections recalling that EU law (and DEFRA commitments) mean we will all have food waste collections by 2023. Did we forget? b) reduce some packaging waste from plastic films that cannot now and in the future will not be recycled, especially when stuck to food. c) get food waste back to soil without plastic contamination. We forget, soil is receiving plastic waste at a higher rate than oceans.  Clearly the EFRA committee has not read this report, sent to them some months ago.

“People who criticise compostable packaging do not understand their role. It is a niche role, but significant in helping solve these issues around food and soil. These are critical issues for production of food, 95% of which is produced on soil.”

Bio Market Insights Issue #14If you enjoyed reading this bioeconomy story, you may also enjoy reading the below ones.

Read: Expert view: Going around in circles with compostables.

Read:  SC Johnson promotes recyclable and compostable plastic packaging in sustainability update.

Read: Huhtamaki unveils new compostable double wall cup.

Read: AMT Coffee unveils ‘let’s make the change’ bio-compostable cups for Christmas season.

Read: Deterioration of compostable bags in the sea happens rapidly, new study finds.

Read: Student brews up a ‘Flat White’ after creating range of glasses made from coffee grounds.

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