This sounds like an opportunist fly may have got into your bokashi bucket and you are seeing maggots in the bin. Although maggots in your bokashi bucket can be pretty disgusting, they will do no harm. There is no need to throw the bin of bokashi food waste away.
Maggots in your bokashi bucket will have come from an opportunistic fly laying eggs on your food waste, either in your collection caddy on your kitchen counter, or when you have been loading your bin and left the lid off for a moment or two. If you accidentally left the tap or lid open then this would give flies more opportunity to lay their eggs in your bokashi bucket.
Maggots hatch within 8-24 hours of being laid. However, maggots cannot survive in the bokashi bucket environment as it is anaerobic and acidic. Any maggots you see in your bokashi bucket will be small and will die quickly. They’ll even add a bit of protein to your compost!
Don’t be put off. Maggots in your bokashi bucket happen very rarely. Here are a few tips to reduce the likelihood of repeat problems:
1. Take a close look at your bokashi bucket. Is the lid sealing properly? Is there a split in the lid? Is the spigot closing completely? Any small gaps could allow flies to enter and lay their eggs.
2. Don’t leave the lid or spigot open for longer than is necessary to load food waste and drain the bokashi tea.
3. Collect your food waste in a sealed container before loading into your bokashi composter. Again, this gives flies fewer opportunities to lay their eggs on your food waste.
4. Ensure that you are adding enough bran. As mentioned, maggots cannot survive in the acidic environment created by the bokashi microbes. If you see maggots in your bokashi bucket or suspect that flies may have been in contact with your food waste, then sprinkle in an extra handful of bran to discourage them.
Hope that helps.
Happy composting 🙂