If you can somehow collect coffee grounds to make cement, you can also collect is as part of generic biological waste fraction and use it as a fertiliser. I ha

If you can somehow collect coffee grounds to make cement, you can also collect is as part of generic biological waste fraction and use it as a fertiliser. I happen to use coffee grounds (yes, we make a lot of espresso at home) and we already use spent coffee grounds as natural fertiliser. It improves the soil for some of the plants, improves aeration, attracts earthworms.