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Foss Farm/Foss Biolab By Knut Vasdal Farmer at Foss farm ([email protected]) Presentation at Bioseminar, Telemark University College, 21. December 2011

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Presentation at Bioseminar, Telemark University College, 21. December 2011. Foss Farm/Foss Biolab. By Knut Vasdal Farmer at Foss farm ([email protected]). Foss farm. 60 milking cows Organic farming since 1990. Meat and milk. Metan. Manure. food. Metan. N2O. N2O. Fertilizer. - PowerPoint PPT Presentation

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Lysbilde 1

Foss Farm/Foss BiolabBy Knut VasdalFarmer at Foss farm([email protected])Presentation at Bioseminar,Telemark University College, 21. December 2011

1Foss farm60 milking cowsOrganic farming since 1990

foodMeat and milkMetan

ManureFertilizerMetanN2ON2OOrganic farming No chemical/syntetical fertilizerNo pesticides

Organic farming systemsCrop rotation Ruminant animalsBiological nitrification Soil structureCow manure slurry 2011 Foss farm

Cow manure slurry-Great NH3- emission after spreading at fields-Difficult to utilize in high populated area-Demage soil structure-Conserve weed seeds and patogen spores-Impossible to spread exactly+Cost efficent way to spread on fieldsProcess line Foss biolab

Foss biolab Started 20072010- indoors2011 pilot process line for cow manure

Scientific worksTest lab for full scale full scale biogas plantsEducation

Solid/fibrous fractionVermicompostingImprove soil structureRemove stinky smellIncrease microbial activityDecrease weed seeds germinationRemove patogen organismStabilize carbon fraction

Organic matter in the soil-soil fertilityWater housholdMicrobial activityNutrition exchange capasityAggregat building/soil structureHeat absorptionSoil erosion resistanceCarbon immobilization

Biogas-Foss farmBioenergy centralHot water for 32 houses need 384 000kWh86 000kWh energy from biogasWood chips for rest energy demandStart up 2012-2013

Foss Housing AreaCa: 20 housingHousing reaCa: 12 boenheterBioheatcentral

Biogas plantFoss farmJPE/2011Liquid nitrified fertilizerNo N- emissionNo N2O-emissionNo smellSpreading indors or outdoors even on sunny daysNo residues on leavesNo patogensNo weedsEasy to spread exactlyAlso as leaf fertilizerAvailable directly as plant nutrition

Chemical changes during AD and DNR process for nitrogen

Physical changes during AD and DNR process for sCOD

ph dependency on NH3/NH4+

Physical changes during AD and DNR process for pH

Physical changes during AD and DNR process for alcalinity

Gas productivity on different batch