People are trying harder to find ways of reusing their rubbish as they are concerned about manmade climate change and use of the world’s resources. The majority of us send our glass, paper and plastic to be recycled – we even reuse ice-cream tubs and glass bottles as containers around the home. But what about leftover food that we can’t eat? Is there a use for that?
Many people throw their scrap food onto a compost heap in the garden – be it apple cores, potato peeling or burnt toast! Compost heaps are a great way of reducing the rubbish a household chucks out while improving your garden at the same time.
But what can make rotten fruit and veg good for a garden? It’s simple – bacteria. They break down rotten plants and vegetables. You can watch this process happen as the food scraps appear to fall apart, turn brown and most importantly get hotter. In fact, even a small compost heap or food bin can get very hot – sometimes around 40-60 degrees Celsius. If you hold your hand over a compost heap, you can feel the temperature. This increase in temperature happens as the bacteria break down the old scraps and they create carbon dioxide and heat. This isn’t so different to us humans when we’re exercising!
When it gets hot, microorganisms take over. Insects, slugs and worms also join in, eating the food and excreting the finished compost.
After a few months, once the compost has cooled and all the food has broken down, it should be ready to put into the soil. This introduces nutrients into the earth which are much needed by plants. The microscopic organisms also help to bring air into the soil. This makes for a very healthy crop of veg – whose peelings and leaves can be thrown into the heap next year!