EAU / ENVIRONNEMENT

WATER / ENVIRONMENT

Water & Environment

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Environmental policies in the Global South are changing.

Environmental awareness is currently a reality in these countries and many have a real ambition to take action for the environment, thus opening up a market hitherto very limited. Opportunities are now developing, and a strategic entity located in these countries is a real asset for this exponential-growth market.

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This sensor measures the temperature or relative humidity of air in spaces filled with water droplets. The temperature and relative humidity sensors are inserted in a vertical tube to protect them from airborne water droplets. An upward flow of air travelling through the tube and a regulated aspiration speed prevent the formation of water droplets on the sensitive parts of the sensors.

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The used chemicals which protect the wood of the bioticks damages contain substances which are often highly toxic.

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This solution developed by IRD consists in producing Sulfuric acid at a very high yield (90-100%) with the help of alkaliphile Sulfato Reducing Bacteria from the Desulfohalobiaceae family or the Desulfonatronum group, when they are growing under optimal aqueous conditions (pH > 9.5).

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The invention described here relates to a co-culture of resistant bacterium of the Mesotoga lineage and at least one Hydrogenotrophic Sulfato-reducing bacterium. The process is proved to be a treatment method of heavy metals contaminated sediments.

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In the context of climate change, protecting sensitive coastal areas is a real challenge for the future. Breakwaters are continuously undermined by erosion and are subject to increasingly stronger and more frequent storms. They may break apart or be submerged, leading to the flooding of  inhabited, agricultural or natural areas.

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Human wildlife conflicts are generally defined as “any interaction between mankind and wildlife inducing negative effects on the social, economic and cultural communities and the conservation of wildlife and its environment “(IUCN). Nowadays various causes contributes to increase human-wildlife conflict (population growth, inappropriate agricultural practices, elimination of traditional use rights of the wild resource etc …).

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The MIO (Mediterranean Institute of Oceanography) has developed a new microbial process to enhance the degradation of hydrocarbons of various types (alkanes, alkenes) thanks to the use of Archaea bacteria under anaerobic conditions.

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The “VCP” is a specific kind of green-roof specially developed for light-weight structures with steep slopes under tropical climates. The VCP acronym stands for Vegetalized Complex Partition type Ligneous over Structure and Air gap.

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The decontamination process is using Cistus Libanotis which extracts and reduces the mobility of lead in soils. This plant has the advantage of being a pioneer plant, persistent and exhibiting rapid growth. This natural process, innovative and environmentally friendly is the right solution to overcome the mobility of lead and a few other metals at the vicinity of contaminated sites.

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The technology, developed by IRD and Cadi Ayyad University (Morocco), uses the beneficial effects of native mycorrhizae found in contaminated mine sites to improve the phytostabilization process of the area with using fast growing plants, for example Eucalyptus spp, casuarinas, jatropha curcas or Australian acacias.

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The technology is about an innovative catalytic material, used as porous electrode in a electrochemical depollution process with percolation. With this kind of process, electrodes are made of graphite felt which all the fibers are covered by a thin metallic layer (few nm).

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Scraper Box is a simple, efficient and low cost innovative technology for thickening liquid sludge. It can be automated and does not require conditioning polymer. It produces sludge that is 60% more concentrated than with usual thickeners: sludge dryness is increased significantly from 3 g/L to 30g/L at least, without the use of costly polymer.

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Trace metals are often difficult to quantify in the natural environment. To make these measurements, “passive” sensors areused. They are deployed on-site for several days to obtain a sufficient concentration of pollutants. These devices have some limitations: uncertain reliability, low sample surface, biofouling problems, drift, etc. The IRD and the Geosciences Environment Toulouse laboratory (GET) have developed a sensor that allows to overcome all these drawbacks : Tracesense.

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