Can I use bags for biowaste?
Yes — but only kraft paper bags are allowed.

Can I throw compost or potting soil in the biowaste bin?
No — their low fermentable content makes them unsuitable for biogas production.

Can I put pineapple and citrus peels, chicken, beef or pork bones (large pieces) in the biowaste bin?
Pineapple and citrus peels can be disposed of without any problem. The treatment process involves a higher temperature rise than in a backyard composter, so the waste decomposes faster.
For chicken, beef and pork bones, it’s best to avoid large bones. A chicken carcass is acceptable, but beef rib bones, for example, are not recommended.

What if my biowaste bin is rejected?
A rejection sticker will be placed on the bin. It will then be collected during the next household waste round.
For voluntary drop-off points, the collection crew will forward rejected sites for fallback collection.

What if my bin’s reduction insert falls into the truck?
Contact SIETREM as soon as possible — we will replace the missing insert.

What happens to my biowaste afterwards?
For shared composters, when the harvest is complete, residents will be invited to collect compost to use in their gardens or balcony gardens.
Biowaste deposited in the bins will be sent to an agricultural methanization unit, where it will be recycled as biogas or soil fertilizer.