Tag: Food Waste

Big recycling news!

June 5, 2017 /

If you have looked at the bins at King’s recently, you might have noticed our new recycling guides. King’s is committed to achieving a recycling rate of 70%, and our new recycling guidelines are a small part of the wider changes that have been happening behind the scenes in the last months.

New recycling guidelines

New recycling guidelines

Throughout this summer, our new waste contractor Simply Waste Solutions will start collections at all campuses, beginning with Denmark Hill this week. Simply Waste Solutions will replace several current contractors, and help us deliver a more consistent service across King’s. This means no more differences in what can/cannot be recycled depending on campus!

In addition to the new bin signage, we have created a Waste A-Z to help make recycling as easy as possible. This guide can be found at internal.kcl.ac.uk/recycling. If you would like to see additional resources, or have questions about other waste types, please let us know!

Our contract with Simply Waste Solutions means we will now be able to tackle more waste streams. One of these is food waste, which is currently only separated at Strand. With the new contract, King’s Food will separate their kitchen waste at all campuses, and send the waste to anaerobic digestion. In addition to this, we will be able to extend our coffee cup recycling programme to more campuses.

30,000 coffee cups

30,000 coffee cups ready for recycling

The Maughan Library already has this programme in place as a result of taking part in the Square Mile Challenge, and other campuses can expect to see coffee cup bins pop up in the next months. Usually, only 1% of disposable coffee cups in the UK are recycled. With the Simply Cups programme, we can collect cups and Simply Cups will turn them into new products. So don’t be surprised if your coffee cup makes its way back to King’s looking very different (e.g. a canteen tray or pen).

So, what happens to our waste?

As long as it is not contaminated, everything in our recycling bins will be given a second life. Paying attention to the recycling guidelines is important, as recycling bags may be classed as “contaminated” if they contain non-recyclable waste. Contaminated bags may end up being rejected, so it is important to pay attention to what goes in the bin. A common doubt regarding recycling is how clean items like plastic pots should be when going in the recycling bin. Things like yoghurt pots and plastic bottles should be empty and not contain any food or liquids, but they don’t need to be spotlessly clean. A rule of thumb is that if you would happily stick your hand in the recycling bin after binning your item, and it could come out clean and dry, it’s good to go in recycling.

KCL EF RECYCLE PUFFS - 1Our food waste goes to anaerobic digestion. This means that it will be put into sealed containers and broken down by natural micro-organisms. At the end of this progress, two products remain: biogas, to be used as fuel to generate renewable energy; and a nutrient-rich digestate, used as fertiliser.

Glass waste is sent to plants where it can be washed and sorted into colours. It is then melted and moulded into new products. As glass does not degrade through the recycling process, as paper fibres do, it can be used again and again!

The remaining general waste is not sent to landfill, but incinerated in energy-from-waste plants. The created heat is used to generate electricity (fed into the National Grid) and to heat homes. The remaining ash is collected and used as a material for road construction.

This means that with Simply Waste Solutions, we are able to send zero waste to landfill for all of our general, bulky and food waste.

Simply Waste's chief mouser

Simply Waste’s chief mouser

Fun fact: On a recent visit, we met Simply Waste Solutions’ very own chief mouser – a former stray who just turned up and moved in one day. Here he is, roaming the waste yard and making sure everyone recycles properly.

How to deal with food waste: Introducing the Wormery

March 24, 2017 /

For most of us, food waste is an everyday reality. Whether it is buying vegetables we can’t quite finish, or cooking too much pasta or rice, it is hard to avoid. At Champion Hill Residence, students have two great alternatives to throwing food waste in the general waste bin – and one of them involves some very interesting ‘pets’.

CompostingBin

Composting bin

In September this year, the Champion Hill team sent out emails to new residents to see if anyone was interested in a food composting project. Since then, 22 kitchens signed up and picked up their food waste caddies – that’s 25% of residents! The composting bin is located in the courtyard of Beech block, and open at the bottom to make it possible for insects to get inside and help the composting process. And it’s not just for food waste: paper and cardboard make composting more efficient – and less smelly.

WormerySmall

The Wormery

But, hidden from sight, there is another way of breaking down food waste: a Wormery. In a wormery, a colony of worms eats through the food waste. While it might not sound nice, worms are highly efficient at dealing with waste, and leave behind useful by-products in the form of fertiliser for plants. The residence’s Sustainability Champion Holly found out about wormeries while researching food composting, and loved the idea. At the moment, the Champion Hill wormery is home to around 480 red tiger worms – a number that is expected to increase rapidly once the worms start breeding in the warmer months.

MenuSmall

The healthy worm diet

They eat most things we eat: vegetables and fruit, peelings, bread, cake, and even pizza. To make sure they get a healthy diet, the team has placed a ‘worm menu’ next to the wormery (see picture). How quickly food waste is composted depends on the temperature: At the moment, worm activity is lower due to the cold, but activity and composting is expected to speed up when it gets warmer. And it turns out worms are not very demanding pets. Even though you do need to add a handful of lime mix every couple of weeks to prevent acid build-up (and to help the worms’ digestion!), once worms are fed they can be left alone for a few weeks.

The container is sealed, and liquid can be taken out through a tap at the bottom, which prevents the nasty smells we often associate with composting bins. This liquid is also rich in nutrients. Diluted, it can be sprayed onto plants as fertiliser.

And much like in conventional composting bins, the solid material worms leave behind can also be used to fertilise plants. Both the composting bin and wormery are relatively new, but once the fertiliser from both of them is ready in the spring/summer, the Champion Hill team plans to make the most of it.

Inside the wormery - no worms visible due to cold weather

Inside the wormery – no worms visible due to cold weather

One idea is to set up a herb garden in the residence, making the space more interesting for students, as well as adding to the biodiversity of the courtyard. If you have been at Champion Hill recently, you will have seen the early stages of this project. As a university, we are constantly working on improving our environmental footprint. Efforts such as the food composting projects by the Sustainability Champion Holly and the rest of the Champion Hill team are an excellent example of how this can be achieved through new and sometimes unusual ideas.

Resident at Champion Hill and want to compost food waste? Make sure you know what you can and cannot dispose of at Champion Hill by contacting the residence team. The composting bin is located in the courtyard of Beech block. The wormery is not directly open to students to make sure the worms get the correct diet, but food waste from participating kitchens is taken there by staff.

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