Are biodegradable sponges also compostable?

anon_ymous

I've seen these and they're fairly cheap 

https://amzn.eu/d/fVBBuDo

However they're not explicitly marked as being compostable. I would have however thought that given they're made from plant based materials, that they'd also compostable?

My scraps are composted through a commercial composter too which should in theory make it easier?  Ie: via this 

https://youtu.be/rRCSjjtIqos

Or would these simply be biodegradable instead of compostable?

This one says that they're compostable but it seems to be the exact same materials as this for example 

https://amzn.eu/d/aELgvLE

Which says they're compostable tbf too 

QrizB

No familiarity with that particular product but yes, I would expect both cellulose sponges and sisal to be compostable.

ed110220

I guess it depends on how quickly you require them to break down. I used to sometimes put compostable bags of food waste in our home compost bin if there was no meat, bones etc in them, but I found that they hadn't fully broken down by the time the compost was ready so it looked unsightly in the garden. But I'm sure they will break down after a while. If it's going somewhere commercial for composting I'm sure they will have some system for dealing with this.