From a food processor to the best kitchen composter - the KALEA story

Every good story begins with an idea. A theme from the heart. We asked ourselves the question of whether we could face the daily kitchen waste hassle. And beyond that, whether we could make something really useful out of our daily organic waste. Every German produces 120 kg of it every year. At KALEA, we believe there are cleaner and more convenient solutions to handle kitchen waste at home. Nature has already given us inspiration. Composting turns biowaste efficiently into soil-like fertilizer. With that inspiration, we have linked a natural process to smart technology and convenient use.

Dieser Beitrag ist auch auf Deutsch verfügbar. Du findest ihn hier. (Links to our German blog post)

Our KALEA journey began in 2017, and together with the Technical University of Darmstadt, we started a concept workshop to turn our vision into something tangible. Due to the fact that fast, clean, hygienic, and effective composting already existed - in huge numbers! - large-scale composting plants created what we wanted to bring into our own four walls. So we asked ourselves, “How can something that composts tons of organic waste be scaled up so that it can be applied to a few kilos per week?” The answer: Think small!

Kitchen composter: Stir, chop, heat - The Perfect Mix?

The first prototype test object was quickly found. We used a conventional, fully automatic kitchen machine, which basically had the same functionalities as a large composting plant: it could stir, shred, and heat. Important processes to stimulate the natural composting process.

But, it wasn’t as simple as that. We developed an ingenious chopper and installed a small water pump, a moisture sensor, and a mini blower which provided fresh air and heat exchange.

The kitchen waste of our brain food, from banana peels to apple cores, we diligently collected and threw everything together into the food processor to check if our mince processor worked. For three days we composted. We came to the wonderful conclusion, thanks to a maturity test that our pimped up food processor was composting. The proof was there and we translated the principle of the large-scale composting plant into a minimal concept. Without chemicals, we helped the natural microorganisms with our upgraded device, so that our kitchen waste could be composted within a short period of time. The birth of KALEA.

From prototype to KALEA pioneer

An incredibly important factor in composting is the moisture content of the biomass to be composted. The natural microorganisms are very choosy here. It must not be too dry, but also not too moist or else the biomass starts to ferment. The typical smell in our organic waste bin - you surely know it. It was also important that the waste is neither too warm nor too cold. Hot temperatures literally kill the fungi and bacteria responsible for decomposition. If it is too cold, the microorganisms are too inert, and composting takes far too long.

So, how do we match the perfect conditions for our microorganisms? We found inspiration in the food industry. In what is known as horizontal mixing, biological biomass is stirred up at low temperatures to extract sufficient water from the food.

The foundation was laid, and an insightful experience was gained. We developed the first fully functional prototype. One last hurdle? The resulting smell. Our aim was to develop a super convenient kitchen composter that we would like to have in our kitchen. We used activated carbon filters from cooker hoods to make KALEA completely odorless and we also used a heat exchanger from a discarded Smart that was small enough for our slim design. But KALEA was not only meant to be stylish but above all else, functional. That's why we developed a unique 2-chamber system that allows KALEA to be filled at any time.

In 2018 during Christmas we gave ourselves the biggest gift: With the help of a development partner, we put the finishing touches on KALEA and one week before Christmas Eve we were able to produce the first version of the almost perfect KALEA kitchen compost. Kitchen waste was composted in only 48 hours with a nearly perfect KALEA kitchen composter.

Compost is not just compost!

One of the most beautiful takeaways and the most important part of our development process: KALEA produces real compost. This means that the filled organic waste has been completely processed and composted and is therefore particularly rich in nutrients. You can fertilize your plants directly with the fresh KALEA compost. Why is this important? There are many reference products that advertise the production of compost. But in reality, they only produce shredded and dried organic waste. In the worst case, this can be dangerous for your plants, because organic waste can continue to ferment in the soil and release toxins.

From a food processor to a fully automated kitchen composter, which produces fresh, nutritious, and genuine compost. Slim, robust, fast, and super smart. For us, it is clear: KALEA is the best kitchen composter ever! With our V4, we now make it perfect - and soon you too can make fresh KALEA compost at home.

Be the first to know! Our campaign will be released via newsletter and provide a highly limited discount – up to 50%! Be a super early bird and become one of our first supporters. Just sign up to our news list:

1,075 views0 comments

Quellenstr. 7
70376 Stuttgart

  • Instagram
  • Pinterest
  • Facebook
  • YouTube

From Stuttgart with    

Produced in the EU

All Rights Reserved. © Copyright 2020

An electric composter for your kitchen - home composting made convenient with KALEA 

Are you looking for a sustainable and convenient way for food recycling? Such as a mini-compost pile for your home, but without the smell, flies and mess? KALEA has developed an electric kitchen composter, which is the first indoor composter of its kind and suits all of your food composting needs.  


Interested in making compost at home? KALEA turns your organic waste into fresh compost automatically, hygienically, safely, and without odour in just 48 hours. 


An electric composter in the kitchen saves you from having to walk up and down stairs, and even without your own garden or balcony you can make something useful out of your organic waste. Our unique composting system combines nature with high tech, and allows you to compost at home hassle free. 


Our KALEA kitchen composter can process more than just fruits and vegetables. You can also put nutshells, fish, small bones, dairy products and cooked food in the organic composter.

With an automatic composter bin you can make something truly useful for your plants! 


The nutrient-rich compost produced from organic waste in our electric composter contains all the essential nutrients and minerals that plants need to grow. Simply mix the compost in a ratio of 1 to 10 with fresh, peat-free soil. You can use it for your indoor plants or outside in the garden. The best thing? The compost produced from our automatic composter can even be stored for up to two years. 


Ask yourself: Which kitchen composter is the right one for me? We say: KALEA! Because composting at home has never been so easy. In October 2020, our crowdfunding campaign will begin. Our newsletter is the best place to get updates about the campaign, including when it will start. Exclusive perks will be available through our crowdfunding campaign, including discounts up to 50% off the KALEA composter.


Do you have questions about kitchen composters, home composting or food recycling? Then please get in touch with us at