Hi Eline. We encourage
looking at waste using the well-known mantra: Reduce, Reuse, Recycle.
The first steps
should always be to look into reducing and reusing. This would be thinking
about how you run your experiments. Is there a way to optimize so that you use
fewer pipette tips?
Good planning can
mean you prepare your samples together and only use one pipette tip for each
chemical, or if you have variable amounts, to pipette twice with a smaller tip,
rather than switching to a bigger pipette tip for that one single sample. Can
you reduce the size of your experiments, so that you can use smaller pipette tips? For
the appropriate experiment/chemical, you can also label the used pipette tip
and reuse it multiple times throughout the day.
Choosing tips made from recycled plastics or switching to glass may also be options. And there are pipette tip washers on the market for those who want to go the extra mile.
Plastic pipette tips can
absolutely be recycled, but not each waste hauler has the facilities or the confidence to do so.
You need to go and discuss with your particular waste hauler and your HS&E
department. Different suppliers make their tips out of different plastics, so
maybe by changing pipette tip brands, you can find something your waste hauler can
recycle. The trickiest part tends to be convincing your waste hauler that your tips are not contaminated and have not interacted with any chemicals that will degrade the plastic.
Although it is
currently in its infancy, we have examples of successful pipette tip recycling.
Usually, it means separating your tips into hazardous/non-hazardous,
decontaminating them and then depositing them in a puncture proof recycling
container. However, do not do this without the written approval from your waste
hauler. If your waste hauler has not approved and they see pipette tips in the
recycling bag, they will just throw away/incinerate the entire lot because they
aren't sure. It takes a bit of leg work to get a tip recycling program started,
but it is completely possible.
Then of course, we also suggest some peripheral
ways to save. Beyond the actual tips themselves, reduce the amount of waste
associated with pipette tips by reloading your own tips - either from a bag of
tips, or an autoreload system. Pipette tip boxes are great for storing small
things in the lab and there are many good pipette tip box recycling schemes (and
for this you don't necessarily need to go through your waste hauler). Then
there are lots more tertiary reductions, such as combining orders with other
labs to reduce the amount of packing waste and delivery carbon footprint.
We approach every project with a scarcity mind-set. It is important to plan before acting.
1. Look through published literature - for methods, advancements, identical experiments
2. Look through your old data carefully - Is this new experiment really needed to fill a knowledge gap?
3. Can the data be predicted via modeling?
4. Decrease the number of experiments or repeats - What is the minimum number of experiments?
5. Downsize your experiment - What is the minimum size/volume for the experiment?
- Can you use a 0.5mL eppendorf tube instead of 1.5mL
- Can you use a 96 well plate instead of many cuvettes?
6. (if applicable) Add the data to a modeling database and share with colleagues/public for future use
Hi Kacey, This is a really common problem. It's not
just your university! You would be surprised at how much "pretend
recycling" there is around.
The key is to have a very frank meeting with your
building services manager and your waste hauler and find out what they need to
get recycling... actually recycled.
This mean actual print in the contracts that states your
waste hauler will fully (or at least partially) recycle what they collect and
that they don't just incinerate, send to developing countries or just send to
landfill (yes, this happens).
Another problem we commonly see is that waste haulers use
contamination to pass the buck onto you. They need to accept a certain
percentage of contamination. One rogue item should not invalidate the entire
bag. Then, it’s up to you to put in programs to get students /staff to think
before they put things into recycling bins. We all like the feeling of doing
good as we pop a bottle into the recycling... So we put things in even if we're
not sure. Plus, every waste hauler has a different definition of “recyclable” -
many things that say “recyclable” are actually considered contaminants by your
waste hauler. Since, recycling sorting is extremely primitive, we need help by
pre-sorting things. You should find out what items are considered actual
recyclables by your waste hauler and make posters and start education campaign
to keep contaminants out of your recycling.
There are also some specific lab recycling schemes -
for example gloves, tip boxes, certain plastics, and equipment. Some of these
programs are free or you just need to pay the shipping. You can talk to your lab
manager about diverting some of your waste there. This can help circumvent
working with your waste hauler.
Setting up a lab recycling program is a long process.
Start small, but don’t give up. We just "completed" a lab waste
overhaul at an industrial R&D facility. It was a really tough negotiation between
us, building management, EH&S, lab employees and the waste hauler. As Green
Lab Enthusiasts, we weren't able to do everything we wanted, but we got the
first phase going. We set up a trial of a lab waste recycling scheme for one
type of plastic bottle in one pilot lab. It has been an uphill battle and more effort
will need to be put in. We will be putting in place training and reminder
campaigns for users. We will continually be tracking the program’s success and
issues and making customized adjustments. Once a proven model, we will then
look to expand to more recyclable items and more labs in that facility.
Make no mistake that it is a lot of work starting such
a program, but once you’ve pioneered this with your waste hauler/lab/University,
then others can follow in the trail that you've blazed.
1. Freeze our fly waste in the -70 freezer for two days instead of autoclaving it.
2. Unplug all vials and wash the plugs so they can be reused.
3. Reuse the plastic plates (from fruit juice agar plates) also by freezing them, discarding the agar and washing the plates with regular soap. Our lab has never bought new ones, always reused the batch we have.
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