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The impact of corona on our impact
Rotterzwam grows oyster mushrooms on coffee grounds . But what if the entire country suddenly works from home due to a pandemic? That has a significant impact on our impact.
We share our mushroom substrate recipe
In August 2019, we posed a simple question: What information, insights, or knowledge about mushroom cultivation is valuable for a beginning grower? We asked because we wanted to improve our perfor...
The impact of Rotterzwam in 2019
The topic of " Reverse Burden of Proof for Companies " was recently in the news. A referendum is being prepared in Switzerland that will shift the burden of proof for violations of rights and regul...
Like mushrooms popping up from the ground
In 2013, we started with an unusual idea in an unusual location: growing mushrooms on coffee grounds in a vacant subtropical swimming paradise. The subtropical swimming paradise is now called Blue...
From plan to experiment: the legal waste stream soap
This blog series is about our "Back to the Soil" project, in which we investigate whether several organic waste streams can be used as soil improvers in arable farming and how this can be legally a...
In July 2019, with a great deal of effort, we managed to spread approximately 45,000 kilos of three different residual flows on a test field in Voorne-Putten. It's now October, and a green manure h...
Organic waste flows on the soil: why?
Most people don't think about soil on a daily basis. Understandably. It's a brown mess, it gets your hands dirty, and it's not very exciting to look at. Yet, soil is so much more than that, and ...
update 1: pot tests, collecting residual flows and spreading
This blog series is about our "Back to the Soil" project, in which we investigate whether several organic waste streams can be used as soil improvers in arable farming and how this can be legally i...
One plus one equals two: on the one hand, organic streams are available and incinerated with residual waste, and on the other, there's a shortage of these same organic streams. Reason enough to ex...
First national campaign for a more plant-based diet
The first national campaign for a more plant-based diet was launched on June 1, 2019, with the slogan "This is how it can be done." Initiated by the Green Protein Alliance, of which rotterzwam is ...
On Friday, May 24, 2019, Alderman Bonte, responsible for sustainability, officially opened the new rotterzwam mushroom farm. He did so by cutting a ribbon and then harvesting the first mushrooms. ...
Blog series Back to the Soil: organic waste flows, waste legislation and soil research
This blog series is about our "Back to the Soil" project, in which we investigate whether several organic waste streams can be used as soil improvers in arable farming and how this can be legall...
Special beer made with oyster mushrooms
Collaboration is the new competition. That's why we've once again partnered with a fellow entrepreneur from BlueCity. This time, it's not about a plastic waste stream, but about something drinkable...
The impact of Rotterzwam in 2018
Sustainability One of the most frequently used bingo words in the circular entrepreneurship category in recent years. It's used all the time. I recently saw it on a jar of sambal: "Now with sustai...
Back to the bottom, closing the loop
For five years, rotterzwam has been developing a decentralized solution for the highest possible quality processing of coffee grounds. A unique collaboration has been established with the "Back to ...