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Biochar solutions for reducing pollution in the Netherlands

Biochar solutions for reducing pollution in the Netherlands. Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema. Overview of this presentation. Two Projects: Assessment of the use of bio char as manure improver to reduce nitrogen pollution

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Biochar solutions for reducing pollution in the Netherlands

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  1. Biochar solutions for reducing pollution in the Netherlands Guido van Hofwegen, Joep A. van den Broek, Gertjan A. Becx, Ellis Hoffland, Oene Oenema

  2. 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

  3. 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

  4. 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?

  5. 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).

  6. Methods & Planning • Pot experiments with several sand, charcoal and manure mixtures, representing the Dutch situation • Experiments will start in September

  7. Upcoming issues • Which charcoal to use? • How should we treat it before use (milling / NHO3 treatment)?

  8. 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

  9. 7.1 tons C02 equivalent 0.5 tons CO2 equivalent 0.1 C in compost 0.5 C in biochar + + Expected results NOW Household and other organic waste (1 Mt C) `Char scenario’ NOW

  10. 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)?

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