foss farm/foss biolab
DESCRIPTION
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 PresentationTRANSCRIPT
Foss Farm/Foss Biolab
By Knut VasdalFarmer at Foss farm
Presentation at Bioseminar,Telemark University College,
21. December 2011
Foss farm60 milking
cowsOrganic farming since 1990
food
Meat and milk
MetanM
anur
e
Fertilizer
Met
an
N2O
N2O
Organic farming
• No chemical/syntetical fertilizer
• No pesticides
Organic farming systems
• Crop rotation • Ruminant animals• Biological nitrification • Soil structure
Cow 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 fields
Process line Foss biolab
Foss biolab • Started 2007• 2010- indoors• 2011 pilot process line
for cow manure
• Scientific works• Test lab for full scale full
scale biogas plants• Education
Solid/fibrous fraction
• Vermicomposting• Improve soil structure• Remove stinky smell• Increase microbial activity• Decrease weed seeds
germination• Remove patogen
organism• Stabilize carbon fraction
Organic matter in the soil-soil fertility
• Water houshold• Microbial activity• Nutrition exchange capasity• Aggregat building/soil structure• Heat absorption• Soil erosion resistance• Carbon immobilization
Biogas-Foss farm
• Bioenergy central• Hot water for 32 houses
need 384 000kWh• 86 000kWh energy from
biogas• Wood chips for rest
energy demand• Start up 2012-2013
Foss Housing AreaCa: 20 housing
Housing reaCa: 12 boenheter
Bioheatcentral
Biogas plant
Foss farm
JPE/2011
Liquid nitrified fertilizer• No N- emission• No N2O-emission• No smell• Spreading indors or outdoors
even on sunny days• No residues on leaves• No patogens• No weeds• Easy to spread exactly• Also as leaf fertilizer• Available directly as plant
nutrition
Chemical changes during AD and DNR process for nitrogen
40 50 60 70 80 90 100 110 1200
200
400
600
800
1000
1200NH4-N: ADR infl = magenta. ADR effl = DNR infl = red. DNR effl = blue.
[ppm
]
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011
Physical changes during AD and DNR process for sCOD
50 60 70 80 90 100 1100
2
4
6
8
10
12
14
16
18
20sCOD. ADR infl = magenta. ADR effl = DNR infl = red. DNR effl = blue
[g/L
]
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011
ph dependency on NH3/NH4+
Physical changes during AD and DNR process for pH
50 60 70 80 90 100 1106.5
7
7.5
8
8.5pH. ADR infl = magenta. ADR effl = DNR infl = red. DNR effl = blue
log1
0(H
+)
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011
Physical changes during AD and DNR process for alcalinity
50 60 70 80 90 100 1100
5000
10000
15000Alkalinity. ADR infl = magenta. ADR effl = DNR infl = red. DNR effl = blue
[mg
CaC
O3/
L]
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011
Gas productivity on different batch
50 60 70 80 90 100 1100
20
40
60Foss ADR. Feed flow = blue. Reac temp = green (smoothed from t=81d). Batch no: 20110627 = green *. 20110830 = red o. 20111107 = blue*.
[L/d
] and
[Deg
C]
50 60 70 80 90 100 1100
100
200
300Foss ADR. CH4 gas flow.
[L/d
]
50 60 70 80 90 100 1100
10
20
30
40Foss ADR. Temperatures: AD reactor (inside) = red. Room = blue. Reservoir = green. (Smoothed from appr t=81 d.)
[Deg
C]
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011
50 60 70 80 90 100 1100
2
4
6
8
10
12
14
16
18
20Gas production efficiency: Fmeth [L/d] / Ffeed [L/d] (based on assumed feed flow)
[(L/d
CH
4) /
(L/d
feed
)]
Time, t [d]. Time ref (t=0):13-Aug-2011 00:00:01. Min t:26-Sep-2011 00:00:01. Max t:08-Dec-2011