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Climate and resource protection with old cooking fats

Old cooking fats have high energy content. Using this energy makes sense and also meets the requirements of current energy and climate protection policy. The old cooking fats collected by SuperDrecksKëscht® from private households – which are mostly frying fats – are therefore used as far as possible as energy sources.

The greatest proportion is currently being processed into biodiesel that can then be used, for instance, in diesel vehicles or in cogeneration power stations. These cooking oils and fats are converted in a chemical process using methanol and a catalyst into frying fat methyl ester (FME), better known as biodiesel. At the moment, about 90% of the cooking oils and fats collected by SuperDrecksKëscht® follow this route. Unlike traditional diesel, biodiesel is CO2neutral, does not contain any sulphur and therefore contributes to climate protection.

Better still is its direct use after treatment in a separator which removes contaminants and homogenises the old cooking fats. Since the start of the yearSuperDrecksKëscht® has been trialling the use of old cooking fat in its central heating plant in a burner suited to this purpose. Experience to date is very positive and shows that this modern technology works without problems. Since the old cooking fats are not transported any further but are used within Luxembourg, the ecological impact is even better here than with processing into biodiesel.

Cooking oils and fats must not be contaminated with impurities such as mineral oils, solvents or cleaning agents since otherwise recycling into biodiesel is impossible and thermal recycling remains as the only option, which greatly reduces energy exploitation.

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