Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den...
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![Page 1: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/1.jpg)
Biochar solutions for reducing pollution in the Netherlands
Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema
![Page 2: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/2.jpg)
Overview of this presentation
Two Projects:
Assessment of the use of bio char as manure improver to reduce nitrogen pollution
Exploring the possibilities of charring green wastes in NL
![Page 3: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/3.jpg)
Charcoal as manure improver - Intro
Relevance: Fast intensification of animal and arable
sectors 2005: 11,5 mln pigs, 100 mln chicken, 1,5
mln dairy cows EU Nitrate Directive and Water Framework
Directive
![Page 4: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/4.jpg)
Charcoal as manure improver
Research question: Can charcoal improve the nutrient
retention of Dutch sandy soils prone to leaching which are heavily fertilized with pig manure?
![Page 5: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/5.jpg)
What can we expect?
Charcoal is reported to reduce N leaching by Physical and chemical binding of N (in several
ways) Stabilizing SOM (hypothesizing)
But: Nitrate concentrations increases(?) What will happen with P? (Dutch sandy soils are P-
saturated, increased availability might lead to leaching)
Increased bacterial activity might increase gaseous losses (N2O).
![Page 6: Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649d3b5503460f94a164c5/html5/thumbnails/6.jpg)
Methods & Planning
Pot experiments with several sand, charcoal and manure mixtures, representing the Dutch situation
Experiments will start in September
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Upcoming issues
Which charcoal to use? How should we treat it before use (milling /
NHO3 treatment)?
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Exploring possibilities of charring biomaterials in the Netherlands
Exploratory study: Exploring the possibilities of charring green
wastes and other biomaterial for a) generating energy b) reducing the emissions of greenhouse gasses
other than CO2
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Expected results
Household and other organic waste (1 Mt C)
0.1 C in compost
+7.1 tons
C02 equivalent
NOW
NOW`Char scenario’
0.5 C in biochar
+0.5 tons
CO2 equivalent
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Issues to be addressed
Will it be cost effective? Is it possible to char ‘wet’ wastes? Will the charcoal be usable (heavy metal
content / P content etcetera)?