1. Closing the circle in organic waste management
Aldo Ceriotti
National Research Council of Italy

2. Organic waste recycling in Italy
Around 1 bn m3 of di methane were used by motor vehicles in 2014
Equivalent to 1/3 of total yearly motor vehicles methane consumption
400 mln m3 of Biomethane
Recycling
(all wastes)
2012 Target (2008/98/CE)
With kg of organic municipal solid waste pro capite

3. Energy production in organic waste recycling
Organic fraction of municipal solid waste
Energy production by Anaerobic Digestion
Digestate
Solid-liquid separation
DUCK-TECH
From waste to bio products: an integrated and sustainable production system.
Liquid fraction
Compost
Duckweed Phytoremediation
Bio-pot
Purified water
Extraction of oils and starch

4. Production equivalent to
Phytoremediation using duckweed
The Anaerobic Digestion process generates residue including a liquid fraction which is potentially polluting and that must be subjected to expensive waste treatments. It is therefore necessary to develop a technology allowing the uptake of mineral elements and their transformation in renewable biomasses. In addition, the production of quality biomass from wastewater is in line with the European reuest to increase the use of biomass, not competing with food production or increasing environmental impact.
Phytoremediation
0 h
72 h
24 h
96 h
Production equivalent to
781 kg/d ha
48 h
Production of
starch: 2,7 t/ha year

5. Energy production in organic waste recycling
Organic fraction of municipal solid waste
Energy production by Anaerobic Digestion
Digestate
Solid-liquid separation
DUCK-TECH
From waste to bio products: an integrated and sustainable production system.
Liquid fraction
Compost
Duckweed Phytoremediation
Bio-pot
Purified water
Extraction of oils and starch

6. Time of transplantation After transplantation
From digestate to Bio Pot
Solid digestate
Waste Wool
Time of transplantation
After transplantation
Germination
n° Leaf
Leaf Area (Cm2)
Peat
82%
3,2
49,4
5,8
751,9
Plastic
84%
3,6
60,8
6,3
814,1
Eco-Pot
91%
70,0
6,8
1331,2

7. Biomethane production from organic waste and the circular economy