Volume calculations aside a closed bin is not really a very good composting
space. Grass will turn into a horribly sour mess, and would need to be
turned and aerated.
The mass of grass will loose volume very quickly in the summer maybe down to
1/3rd of the original in a month. I know my compost its lose about 2/3
volume over a season.
"shazzbat" wrote in message
...

"David W.E. Roberts" wrote in message
...
Hi,

I am considering the offer of compost bins from the local council - 330l
for
£16-00 (£4 delivery charge) and am trying to calculate:

(a) how many I would need to process lawn mowings
(b) would I have room for them :-)

I know that one mowing from the lawn will fill the brown wheelie bin
from
the council.
[As this is only emptied once every two weeks this is not a solution for
recycling grass during spring and summer.]

So if I knew how much a brown wheelie bin held I could calculate how
long
it
would take to fill a compost bin.

I realise that once composting starts and some of the moisture and air
gap
is lost then the volume will reduce, but this will take a little time
and
I
will probably be mowing at least once a week for the next few months.

I have tried to Google the answer, but no luck.

The bin itself has all sorts of markings, including a decibel rating (!)
but
AFAIKS no volume.

Post the internal dimensions of the wheely bin and I'll tell you the
volume.

Steve