HomeVermicomposting guideMeat, fish, and bones

Meat, fish, and bones

Meat scraps, fish waste, and bones are unsuitable and should absolutely not be put in your Bonter vermicomposter. This type of waste decomposes differently from plant material and causes serious problems in a worm bin. It leads to bad odours, attracts pests, and is unhealthy for your worms or compost.

Can meat, fish, and bones go in your worm bin?

No, meat, fish, and bones should not go in the Bonter worm bin. They are rich in proteins and fats and rot quickly through a process called putrefaction. This process is anaerobic (without oxygen) and produces very unpleasant smells. This odour immediately attracts pests such as fruit flies, but also larger pests like flies that lay eggs (resulting in maggots), cockroaches, or even rodents. The high fat content can also hinder aeration and worsen anaerobic conditions. Bones are hard and will break down very little, if at all, in a worm bin. Adding this waste can disrupt your entire worm bin and make it unusable.

How much meat, fish, and bones can you add?

None. Meat, fish, and bones are unsuitable for the worm bin, regardless of the amount. Even small pieces can cause problems with odour, pests, and disruption of the bin’s ecosystem. Therefore, never add this type of waste to your Bonter. Focus on composting suitable materials like vegetable and fruit scraps, eggshells, and unprinted paper/cardboard.

What to do instead? Alternatives & waste management

Instead of adding meat, fish, or bones to your Bonter, it is best to dispose of this type of waste with residual waste (or Organic waste bin if permitted by your local authority). Some municipalities have special collection points for cooked or raw meat/fish waste for industrial composting or anaerobic digestion. These processes work at higher temperatures and are more suitable for processing animal products than home composting. However, for home use, the residual waste bin is the safest and most hygienic option. Ensure this waste is well-packaged to minimise odours and attract pests before collection.

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Tips for composting meat, fish, and bones

The most important tip is: never put meat, fish, or bones in your Bonter worm bin. They cause bad odours, attract pests, and are not suitable for the worm composting process. This can lead to irreparable damage to your bin. Dispose of this waste directly with residual waste and ensure it is well-packaged (e.g., in a sealed bag) to minimise odours before discarding it. The Bonter air filter is effective for odours from suitable compostable materials.

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