At my visit in beginning of October Mr William DESCAMPS Charge of projects at Délégation générale au Développement Durable and Mr James THEBAULT (Conseiller technique) in Val-de-Marne departement gave me a guided tour at the installation in their Technical department.
Compost from Big Hanna being used in Lasagna Bed
It is a technique of putting layers of brown waste (straw, leaves), green waste (mowing grass) and compost, which could fertilize a soil.
When using the ‘Lasagna bed’ technology in their different trials the compost comes from Big Hanna. The compost is stored in compartments like the one in the photo after discharged from the Big Hanna.
Another study – Ebipol, by UPEC, Université Paris-Est Créteil
The Ebipol scientific experiment done by was started in 2014 (see video) and on my visit I saw the pictures from this study – very impressive! Flowers were planted on ‘Lasagna bed’ with Big Hanna compost, as well as on sterile soil – ‘Terre Nue’ and on topsoil ‘Terre Vegetalisee’.
As you can hear in the video (in French) this project aims to reactivate the biological activity of soils using building embankments or inert soil from deep soils, recovered during construction sites in Greater Paris. ‘If we spread inert soils on urban wasteland in a layer of one meter and we add a ‘Lasagna bed’, we are generating a new fertile soil, explains Philippe Mora, professor at the UPEC. The introduction of earthworms facilitates the process. They favor the degradation of the vegetable matter and will incorporate the lasagna bed in the soil by plowing it.’
This is an on-going project which will be under observation for five years in total.