Speakers at the workshop in Venlo, with Joris Kaanen on the far left, Maartje Frankena in the middle and Bart de Leeuw in front of the NIR poster.
Marius Kehe of Garther Heide.
Guided tour at Walkro Maasmechelen.
Consultant Bart Driessen during his lecture.
Garther Heide and Walkro Marius Kehe of Substratwerk Garther Heide (SWG), part of Mjko group, gave a playful pre- sentation in which he indicated that it is not easy to get a good overview of all the data. Since 2014, SWG has started to analyse with the NIR. SWG is a small compost company, where pro- cess control, management and operational mat- ters are only a few people in my hands. This includes analyzing the NIR data. In the Mjko group, the lines of communication are short, so productions are also directly linked to the com- post that comes out of the tunnels. At first, this data was processed in Excel, but that turned out not to be clear enough and a lot of data was lost. In 2019, they started with Access, a database program in which all data is stored in a structu- red way. According to Kehe, it takes time to organize this, but “with Youtube and a healthy set of brains, you can go a long way.” Looking back on the past five years, Kehe recommended the following: “Give structure to your data by means of a database program; cre- ate data visually, in graphs, traffic light colors, etc.; don’t invent everything yourself; try auto- mating weekly analysis with macros or formulas and; keep it stupid simple!”
In the afternoon, a visit was made to Walkro Maasmechelen, where the participants were given a tour of the indoor compost yard.
Alternative raw materials On the second day of the Workshop, consultant Bart Driesen of GMBC gave a lecture on alterna- tive raw materials for composting. The most commonly used raw materials in the world are straw, horse manure, gypsum and chicken manure. Excluding water. “Why? Because we run after each other like sheep. It works, so why should we do it any other way? Don’t just follow the herd, think like a composter. Is what I do the most profitable?” Sometimes forced, we learn that compost can be made without chicken manure and the results were no less. It is also possible to (partially) replace the straw with alternatives. We see that the raw materials - mostly waste materials - sometimes disappear due to circumstances or are used by other indus- tries, which can create scarcity, and we have to pay more and more.” Driessen’s conclusion: “Think out of the box, think big!” Bart de Leeuw continued, by elaborating on the practical differences within parameters for these materials. He also introduced his first version of
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