natural ressources and conscience
The primordial atmosphere
Today, our atmosphere is composed of about 21% of oxygen, 78% of nitrogen, and 1% of small quantities of various gases: argon, neon, hydrogen, etc. But it has not always been so! It is estimated that Earth's primordial atmosphere - about 4.5 billion years ago - was mostly composed of hydrogen, nitrogen, carbon dioxide (CO2), ammonia (NH3) and methane (CH4). No oxygen, therefore! Or in very small quantities, of the order of only 0.0001%.
Therefore, we are talking about the absence of O2 gas , at that time. Paradoxically, the oxygen atoms were all there, and they were even among the most abundant elements on earth. But for the most part they were linked to carbon to form CO2 or trapped in rocks of the crust and mantle.
Cyanobacteria were the first to invent photosynthesis as we know it. From CO2, water and solar energy, these bacteria - sometimes also called blue-green algae - were able to capture the carbon in the CO2, while rejecting oxygen! Unlike plants (which convert mineral nitrogen into organic nitrogen) and animals (which convert organic nitrogen into another organic nitrogen), cyanobacteria (and a few others) are able to take nitrogen directly into the air, gaseous form, and turn it into organic nitrogen. They thus put 100 million tons of mineral nitrogen a year at the disposal of plants on the planet.
All this changed with the appearance of life about 3.5 billion years ago. A key element of life as we know it, is the ability to produce organic carbon molecules (such as carbohydrates, proteins or lipids), which serve as sources of energy. To make them, living organisms have to find carbon. The first bacteria found their carbon by picking up what came within their reach as nutrients (humans do the same). But about 2.7 billion years ago, a new type of bacteria appeared: cyanobacteria.
Un Jardin sur les toits, presents the first Organic Oxygen Farm based on micro-algae production by biochemical conversion of CO2 to O2 in photobioreactors.
- Plan area 10 000m2 (up to 500 000m2) + Laboratory infrastructure/facility
The plant develops up to 2.6 meters height. In this configuration it is composed of 22 modules. The process is based on the absorption of CO2 by selected algal strains prepared on a laboratory scale and subsequently inoculated into the growth volume in the plant on an industrial scale.
Downstream phase relating to the extraction of Molecules with high added value and Oxygen by means of a patented generator.
Complete redevelopment of an 1930 art-deco building roof-top garden with a pollution analysis laboratory.Learn More
The study of the impact of micro-algae on air and water pollution and hydrology is a new discipline.
This multi-disciplinary activity seeks to provide key notions about the role of micro-algae and to give contextual results.
The term "micro-algae", covers a wide diversity of species with different physical and physiological properties: resistance to drought and evapotranspiration, colour and albedo, density , etc. Local meteorological conditions (sun, wind,and hydrology) vary significantly in the urban environment. Management also plays a major role which is complex to standardise.Always on the lookout for new molecules that can play a role in sectors such as pharmaceutical, beauty, the food industry, agriculture, energy or the conquest of space, the Lab is a key element in the success of any project dealing with micro-algae.
The impact of micro-algae in a polluted environment is no longer questioned, but adaptability remains a question which always requires a great deal of research.
Ecosystemic services are fundamental to the urban environment. Major cities and industries must confront demanding environmental objectives which may sometimes seem contradictory, such as densification to limit urban spread, biodiversity maintenance, anticipating and limiting climate change, the reduction of greenhouse gases and providing a healthy and agreeable environment for the inhabitants. These issues must be taken into account at every level of urban spatial intervention and be monitored over time. Concretely, this requires constant questioning about the role that micro-algae farms have to play in urban setting.
In France, we work on buildings certified HQE® (High Environmental Quality), H & E (Habitat & Environment), BBC effinergie (Low Consumption Building), Passivhaus and BEPOS (Positive Energy Building). At the international level, we work with BREEAM and LEED certification.Learn More
Created in the 1990s in the United Kingdom, it is the oldest repository in terms of sustainable construction. With more than 250,000 certified buildings worldwide, BREEAM now has international visibility.Learn More
LEED® certification, Leadership in Energy and Environmental Design, is an environmental certification for buildings initiated in the United States in the year 2000 by the US Green Building Council®. More than 100,000 LEED projects are certified or currently being certified in more than 120 countries. Each level requires a minimum of points:Learn More
The "Grenelle Environnement 2012" thermal regulation, known as RT 2012, is a regulatory tool for new residential and tertiary buildings. It aims to improve energy consumption by setting a maximum limit.Learn More
The WELL Building Standard (WELL) focuses on the people in the building. Over the last decade, green building standards and standard-setting organizations have made significant strides towards the market transformation of the building industry, resulting in a rapid expansion of green buildings and environmentally conscious building practices throughout the world.Learn More
Definition: ISO 9001 ISO 9001 is defined as the international standard that specifies requirements for a quality management system (QMS). Organizations use the standard to demonstrate the ability to consistently provide products and services that meet customer and regulatory requirements. It is the most popular standard in the ISO 9000 series and the only standard in the series to which organizations can certify.Learn More
What does it do and who is it for? ISO 14001 sets out the criteria for an environmental management system and can be certified to. It maps out a framework that a company or organization can follow to set up an effective environmental management system.Learn More
Organic certification is a certification process for producers of organic food and other organic agricultural products, in the European Union more commonly known as ecological or biological products. In general, any business directly involved in food production can be certified, including seed suppliers, farmers, food processors, retailers and restaurants. A lesser known counterpart is certification for organic textiles (or organic clothing) that includes certification of textile products made from organically grown fibres.Learn More