| Patent Number |
Title Of Patent |
Date Issued |
| 5364537 |
Process for the oxidation of organic micropollutants in water using the O.sub.3 /H.sub.2 O.sub.2 |
November 15, 1994 |
| A process and device for combined oxidation of polluted water, e.g. industrial waste water or effluents, to make it suitable for drinking, involves injection of hydrogen peroxide (pure aqueous solution or diluted) and ozone (gaseous, or ozonized oxygen or air) simultaneously and in a |
| 5314621 |
Method for the biological purification of wastewater |
May 24, 1994 |
| The water to be treated is sent in a co-current with oxygenated gas into an upflow reactor with a fixed bed of particles, and the bacteria support medium used comprises particles with a bulk density of 35 to 65 kg/m.sup.3. The reactor or biological filter (or reactors or biological f |
| 5019268 |
Method and apparatus for purifying waste water |
May 28, 1991 |
| A process and apparatus for biological purification of waste water wherein waste water and oxygenated gas are introduced into a reactor using ascending cocurrents. The reactor is equipped with a lower fluidized bed and an upper fixed bed for filtration. The particles in the beds are |
| 4800021 |
Process for biologically purifying sewage on a bed of granular material |
January 24, 1989 |
| Water is purified according to the principle of a biomass fixed on an aerated granular bed acting as a filter in a biological reactor.The water to be purified is sent, without presettling, upwardly through a multilayer granular bed placed in the reactor. The injection point of oxygenated |
| 4795557 |
Apparatus for gas transfer and flotation for treating water to be purified |
January 3, 1989 |
| Apparatus for treating water by gaseous diffusion and flotation comprising a single reactor which is separated into at least two compartments. One compartment is used for gas transfer with a pressurized gas diffuser flushed by a liquid current wherein water to be treated is introduced |
| 4777138 |
Scoop wheel fermentation unit |
October 11, 1988 |
| A fermentation unit comprising a scoop wheel equipped with scoops on the periphery thereof, and which moves between bunker silos. The bunker silos are equipped with aeration ducts at the base thereof. Flexible scrapers located around the periphery of the scoop wheel scrape the aeration d |
| 4504388 |
Reactor for injection of gas into a liquid |
March 12, 1985 |
| Reactor having considerable volume or surface for injection and distribution of a gaseous fluid into a liquid mass to be treated, includes a false bottom having over its entire surface a series of nozzles each having a small orifice, incorporated with a pipe, immersed in the liquid, |
| 4255266 |
Water purification process |
March 10, 1981 |
| In a biological water purification process polluted water, including surface water to be made potable, sewage water or industrial water, is percolated through a submerged fixed bed of granular material such as activated carbon, chamottes, raw clays, etc., with an oxygenated gas being |
