The general advice is that bread products, including bread, buns, cakes, cobs/rolls, cookies, crackers, donuts, noodles, pasta, pizza crusts, other baked goods or anything made of flour should not be composted in a conventional bin or heap even though
bread and bread products are plant based and will decompose quite quickly particularly, if torn in small pieces or crumbs[R1] . The concern is that they may attract
rodents and other pests. However, bread has been cold composted without problems when buried the in the middle of the bin, or heap, and covered with a layer of “Browns” e.g., dry leaves, sawdust, shredded paper and then with a
layer of soil or manure. If using this approach, the heap should be monitored closely and if it the is any evidence of rodents and other animal pests being attracted to the bin no further bread is added.
As the problem is attracting
rodents not the actual composting process, the more cautious advice the would be that bread and bread products should not be composted unless the compost bin is rat proof. This means that it is not advisable to attempt to compost such items in
an open pile or heap or in a plastic mounted on soil without a rat proof base. Solid sided wooden New Zealand bins, especially those situated on a concrete base, using with the correct Green/Brown balance, regularly turned to maintain the operation temperature
and create a hostile environment for rats have been maintained rat free very successfully when cols composting .
Hot composting techniques have been used in pallet and New Zealand bins that are not completely rodent proof to composted bread,
without having a rat problem. Hot composting techniques require more time and effort than cold composting techniques and it is recommended that experience is gained by using hot composting on uncooked kitchen and garden waste using a New Zealand bin
before attempting the composting of cooked food including bread and bread products.
The Compost bin should be at least three feet wide and three feet high, slightly larger if possible up to a maximum of 5 feet. Bins larger than this involve a
lot of work if the material is to be turned manually. A bank of three bins makes turning easier[R2] as the material can be moved from one bin to another using
the first two bins.
Alternative a compost designed to process cooked food should be used such as a Hotbin, Green Johanna or Jora. Of these the Jora or Joraform (in the UK), tumbler bin, has the advantage of being made of metal and
is mounted on legs off the ground.