Duckweed for nutrient recovery and/or biomass production...• Biomass composition rich in proteins...
Transcript of Duckweed for nutrient recovery and/or biomass production...• Biomass composition rich in proteins...
About Lemna.• Duckweed (Lemnaceae) is a small floating macrophyte
• 4 genus (Lemna, Landoltia, Spirodela and Wolffia) and 40 known species
• Duckweed naturally grows in river banks or lakes but it is also been used for
wastewater phytoremediation through lagoons or raceway systems
• Capacity to duplicate weight in 16 h-2 days
• High productivity per surface (see table).
• High absortion capacity N and P: 2 and 0.5 ton·ha-1·year-1
• Biomass composition rich in proteins 22.5-29.3 %, carbohydrates 10-32.5 % and
lipids 8.7-11.2 %. Suitable for many biobased products
Duckweed technology for improvingnutrient management and resourceefficiency in pig production systems
Life LEMNA aims to reduce manure nutrient pollution of water bodies in
farming areas, improve resource efficiency and close the mineral cycle.
A 250 m2 duckweed-based cultivation system will be designed and built to
daily treat about 3.000L of digestate and produce >35 kg of duckweed biomass.
A biogas plant located in a pig farm will be the project site for demo trials.
The duckweed biomass will be used as a feedstock for producing a
biofertiliser and feed which will be evaluated.
Objectives and scope:
Appenroth K. A., Sree K. S., Böhm V., Hammann S., Vetter W., Leiterer M., Jahreis G. (2017). Nutritional value of duckweeds (Lemnaceae) as human food. Food Chemistry. 217 pp. 266-273.
Mohedano R. A., Costa R. H. R., Tavares F. A., Belli P. (2012). High nutrient removal rate from swine wastes and protein biomass production by full-scale duckweed ponds. Bioresource
Technology. 112, pp. 98-104.
Xu J., Shen G. (2011a). Growing duckweed in swine wastewater for nutrient recovery and biomass production. Bioresource Technology. 102, pp. 848-853.
www.life-lemna.eu/ Farm
Biogasplant
Duckweedproduction
Biofertilizerproduction
Cropfarming
Animal feed
production
LIFE 2015 Agreement Number LIFE15 ENV/ES/000382
Lemna project is being developed under the support of the Life
Programme of the European Commission
Duckweed for nutrient recoveryand/or biomass production
Potential applications of duckweed biomass
Foreseen results
Pioneer prototype in the EU for duckweed cultivation on digestate.
A collection of 25 duckweed strains will be developed.
95-100% nutrient (N and P) recovery efficiency rates treating
anaerobically digested pig manure
Validation of new duckweed biobased products: feed /biofertiliser
Carbon fooprint reduction of animal production.
e-LEMNATOOL for system replication in other EU farms.
ainia´s technical resources and know-how
Manure
Thermal use
of biogas
Digestate
liquid fraction
Digestate
solid
fraction
Biofertilizers soil
amendments
Animal feed
Vegetable raw
materials
Food, pharma,
cosmeticIngredients and
additives to
innovative products
Animal feedHigh quality
protein for fish
and other farm
animals
Biobased
chemicalsCheap and
sustainable sugars
for bioprocesses
BiofuelsBiocarbon,
bioetanol, biogas
BiofertilisersAminoacids and
other bioestimulants
to liquid biofertilisers
BiomaterialsBioplastics,
biocomposites
and other
biomaterials
• Laboratory (1 L) and pilot scale duckweed (50-200L) cultivation systems
• Know-how on duckweed cultivation including initiation, cultivation and harvesting
• Process control by light, pH, COD, morphology and other parameters
Experience
Duckweedmorphology study
Lab scale optimizationcultivation
1 L biorreactor for labscale cultivation
50 L outdoorcultivation
200 L racewaycultivation
Beneficiaries
AINIA, CNB-CSIC, Ecobiogas
Duration
3 years, 2016-2019
Species Production MT
DM/ha/year
Protein %
DM
Protein
yield
MT/ha/year
Duckweed 12-16 16-45 1.9-7.2
Water
hyacinth
24-32 12-35 2.9-8
Homwort 10 20 2
Cattail 32 10-14 3.2-4.5
Algae 8 50 4
Small Scale Biorefining, 2016. Wageningen University & Research