Can I Put Coffee Filters in Food Waste?

Learn how to safely add coffee filters with food waste into your compost pile! Find out what type of coffee filters are best for composting.

Can I Put Coffee Filters in Food Waste?

No, coffee filters are not recyclable like other papers, but they can be used for composting. If you are using a plastic liner filter, it should be placed in the trash after use. In general, yes, coffee filters can be put with food waste. These paper filters are compostable and decompose organically. You can safely add coffee filters to the fertilizer.

The paper is carbon-based and was once alive, so it is organic in the true sense of the word. If you are doing any composting, you can include all the coffee filters generated by your coffee consumption habits. Yes, you can add coffee grounds with its filters to your compost pile. Because they are damp, they break down quickly. Filters can dry out if left on top of the battery in dry weather.

Keep it inside the battery and keep it moist. Additionally, worms compost the soils and filter out very quickly. I have a five-tray worm factory and I just throw away the whole filter with the ground in and close the lid, and my army of five thousand red worms eats it in less than a week. I found that filters were easy to compost in almost any composter. If you have a two-week old CompostTumbler, you'll want to shred it before adding it, to keep it even.

We know that used coffee, whether you use your own or get it for free, is great for the compost pile. But there is not much written about whether coffee filters are also good for use in compost or even if they are biodegradable. Usually, when there is little available on a topic, it means that no problem has been reported. In addition to the type of coffee filters that are composted, other important factors affecting decomposition time include battery temperature, humidity, aeration, and weather conditions. There are many people who use a reusable metal filter or make espresso style coffee, French press or cold beer without any filter. Combine coffee filters with other brown materials such as garden waste like wood chips, grass clippings, dry leaves, sawdust, paper bags, paper towels, cardboard shredding etc.

Some coffee filters contain the OK compost logo or some other accreditation which means that no other additives or non-compostable materials such as plastic have been used to make the filter paper. However, I simply move any non-composted material such as coffee filters to a new compost pile and let the composting complete there. Even though there are some debates about whether they are biodegradable or not, you should use them as much as possible for daily purposes such as taking dry food home from the supermarket or eating watermelon on a hot summer day outdoors without worrying about it. A coffee filter can be used to clean windows, glass, mirrors, TV monitors and other surfaces without leaving any scratches. As a coffee lover and nature lover you will be relieved to know that a paper coffee filter is an excellent addition to healthy compost. That said chlorine is a natural element and it breaks down which means you can still fertilize small amounts of bleached coffee filter papers.

For me I use unbleached and compostable coffee filter papers that I put directly in my trash can for the advice to pick up. Coffee grounds may start to deteriorate before you've finished adding everything to the compost but how can that be a problem? You want everything to rot in the end. Adding too much coffee grounds and coffee filters could disrupt the balance and the organisms that are doing the hard work. Here the water starts to boil and the pressure causes the water to rise through the steel filter to where the ground coffee is and then up through the nozzle and enters the upper chamber. When buying your coffee filters look for the common compostable logos and also the TCF brand (totally chlorine free).

Glenna Matthys
Glenna Matthys

Hardcore internet practitioner. Wannabe beer advocate. Infuriatingly humble beer expert. Devoted coffee evangelist. Hardcore social media scholar. Friendly beer fanatic.