Food Waste Recycling
In Singapore, 703,200 tonnes of food waste was generated in 2012 and the recycling rate is 12%. Food waste is usually processed as animal feed, and undergoes aerobic or anaerobic digestion to produce compost or energy.
Let’s take a closer look at food recycling:
Food Recycling in Singapore
There is a local recycling company that collects soya bean waste, spent grains and spent yeast from food industries, and processes them into animal feed.
A recycling plant collects and turns food waste into methane and compost using an anaerobic digestion process. The digestion process involves microorganisms breaking down the food waste in reactors in the absence of oxygen, thus producing methane or biogas that can be burned to generate energy. The digested food waste can be used as compost for planting. [Unfortunately the plant closed down in 2011]
Watch this video for a simple explanation of anaerobic digestion:
Food waste is also recycled using a mechanical composting process. Some organisations use an aerobic digestion or composting machine to turn food waste into compost. The composting process involves microorganisms breaking down the food waste in the machine in the presence of oxygen, thus avoiding the production of methane. The digested food waste can be used as compost for planting.
What Can I Do
Food waste is not commonly collected from homes for recycling, so what you can do is to reduce your food waste by not wasting food. Check out our tips on Don’t Waste Food.
Also check out more tips on reducing food waste through the Save Food Cut Waste campaign.