Our society has every reason to increase the collection of food waste to satisfy the increasing demand for biogas as an environmentally friendly alternative to polluting fossil fuels. The amount of biogas we produce does not cover the needs for the motor vehicle, or for the production of heat and electric power. We read in the media that owners of biogas powered vehicle experience limited access and long queues at filling stations. The national goal set by the Swedish government is that by 2018 today's 20% collection of all food waste produced annually will increase to 50% . As of 2010, food waste from canteens will be recycled through biological treatment.
There are major advantages for the environment to automate this collection using disposers and transport ground food waste in the municipal sewage system or - if not possible - gather it in a local tank close to the kitchen. Such tanks need to be emptied substantially less often (by e.g. a suction truck) in comparison with today's containers, which must be emptied every one or two days by conventional garbage trucks.
The collection rate of waste by using conventional garbage trucks would be greatly reduced not only because of food waste which has a large volume and heavy weight is processed separately but the remaining dry waste (packaging , etc.) would require less frequent collection. The dry waste would no longer be mixed with organic scraps reducing the risk for bacterial growth, insanitary conditions and bad odors. As transport of waste by road is reduced so are carbon dioxide emissions and the risk of road accidents.
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