Examples of reference projects
Since 2008, its creation date, Valorhiz has improved its knowhow, through many successful realizations. Among them, we are proud to highlight some of these projects that presented particular scientific and technical challenges.
Agricultural reclamation of quarries
Peyrolles en Provence (13) ; Durance Granulats – Eurovia/Eiffage, 2011-2014
The goal of this project is to deliver a functional field to farmers after mineral resource exploitation (cf. Bio-technosols activity). To achieve this challenge, Valorhiz reconstructed a functional bio-technosoil from available raw materials (exploitation by-products and scraping soils).
This project implies the exploitation and reclamation of 97 ha of land. The reclamation according to Valorhiz methodology started in 2014 and will last during 30 years.
Revegetation of exploitation fronts
The goal of this project is to improve the landscape footprint of a limestone quarry based on Valorhiz mastering in ecological engineering (cf. revegetation activity). In addition to meticulous selection of adapted plants for reintroduction, the main challenge has been to restart the life cycle in a very restricting site (sterile soil, no irrigation, high summer temperatures …). To achieve this project Valorhiz performed an innovative ecological engineering based on selection and furnish of site adapted plants and selected rhizosphere microbial communities. The fact that Valorhiz managed the project on both a human and a climatic perspective was also a key of success.
The project started in autumn 2008 and successfully revegetated more than forty fronts. The results, in particular vegetal covering, showed the efficiency of our solutions and innovative engineering approach.
Gneiss infertile substrate revegetation on a slope
Les Ajustons (48) ; Colas ; 2013
The goal of the project is to improve the landscape footprint of a Gneiss exploitation (cf. revegetation activity) while reducing substrate erosion caused by the strong slope.
For this project, several constraints have to be taken into account by Valorhiz: infertile and unstable Gneiss substrate and a strong slope that generate strong erosion.
Vegetation covering 6 and 18 months after Valorhiz action
A first pilot (1000 m²) has been done in autumn 2013. Even without any irrigation, the front presents convincing results after only 18 months. The ecological survey subscripted by our client allowed him to identify the solutions that fit to its atypical site. To summaries, this trial allowed to identify the best practices that will be used for future front reclamations.