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From: Bryanna (
Subject:         Re: OT can you compost used vegj oil (from deep frying)? --nt-- TIA
Date: April 22, 2010 at 10:16 pm PST

In Reply to: OT can you compost used vegj oil (from deep frying)? --nt-- TIA posted by kev on April 20, 2010 at 5:54 pm:

I went to a composting website for an answer to
"Can I compost...
Cooking oil?
No, most of the time anyway.

Cooking oil should be avoided in case it attracts
rodents or other undesireable creatures to your
compost heap. It also can displace water in a small
compost heap and thus slow down the composting

However, vegetable oils such as vegetable oil itself
or olive oil can be composted in very small
quantities as long as they havenít come into contact
with any forbidden food stuffs (like meat, cheese or
fish). Mix in well with Ďbrowní matter such as
cardboard or straw and turn regularly to keep it
aerated. If you canít manage that, itís probably
best to avoid it.

Large quantities of used vegetable oil can be
recycled Ė your local council should be able to
advise if it is possible in your area.

Small quantities of cooking oil thatís been mixed
with other fats and is solid at room temperature can
be reused to make bird feeders for the garden."

AND from

"It is normally advised that you avoid putting used
or unused cooking oil into composters because the
danger is that it could attract vermin. Cooking oil
can also slow down the composting process because it
displaces water.

However, very small amounts of cooking oil, like
vegetable oil and olive oil can be OK to add to
composters. What is vital is that they have not come
into any contact with foods that are definitely not
allowed into compost such as meat, fish and cheese.
The oil needs to be circulated well with brown
matter and mixed regularly.

Additionally, some food digesters can break down
moderate amounts of cooking oil so these could be
worth investigating too. Digesters are specifically
designed so that they donít attract rodents and
other pests. Many people strain (using cheesecloth)
and re-use cooking oil that has been used for frying
vegetables(not meat or fish). You can also use oil
to make items such as soap, hand moisturiser and
bird-feeders. For toiletry items, essential oils
will remove any cooking smells.

Be aware if you are re-using oil for cooking that
over time the flavour may become impaired. Try a
small piece of food before cooking everything in the
oil to check that it tastes OK. You can look up
tutorials for making items like soap and birdfeeders
online. You can also investigate companies that make
bio diesel. Some will collect vegetable oils and pay
you for them.

Disposing of Oil
If you canít re-use oil at any point, itís important
that you dispose of it correctly.


Pour oil down the sink Ė it can clog up the drains
Pour oil down the drain Ė even small amounts can
solidify and cause significant problems
Add used oil to your recycling

If you have a small amount of cooking oil, dispose
of it with your regular waste. Itís best to allow it
to cool and solidify before throwing it away. Put it
in a sealed disposable container before putting it
in the bin. If you have a large amount, for example
from a catering business, contact your local
authority to find out how to dispose of the oil.

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