Institut National De La Recherche Scientifique

Centre De Recherche Industrielle De Québec (criq)

Corporation Biolix

Centre De Recherche Industrielle Du Quebec

Tremblay, Richard

Patrick Drogui

Guy Mercier

Jean-François Blais

Gerardo Buelna

Jean-Francois Blais

Myriam Chartier

Brahima Seyhi

Julia Mouton

Amelie Janin

Marc-Andre Bureau

The present document describes a process and a bioreactor for reducing a bisphenol compound content of a wastewater using a membrane bioreactor containing a biomass in a volatile suspended solid (VSS) form where the biomass in the membrane bioreactor is operating continuously to reduce bisphenol compound content when the bisphenol compound volumetric load is below 108 g md.

Submerged membrane bioreactor system and biological methods for removing bisphenol compounds from municipal wastewater

A process for decontaminating a medium polluted with metals and hydrophobic organic compounds (HOC) includes providing an acidic slurry of water, acid, chloride salt, surfactant, and the polluted medium. Flotation is preformed on the acidic slurry to form a HOC-rich froth and an HOC-depleted slurry and the froth is recovered. The slurry is separated to obtain a treated solid and a liquid effluent rich in metallic ions. Preferably, the process also includes recuperating the metals by chemical precipitation and/or electrodeposition to produce a treated solution. Also provided are a decontaminant having an acid, a chloride salt, and a surfactant as well as a chemical kit for decontaminating the polluted medium including the decontaminant in which the acid, chloride salt and surfactant can be mixed with polluted medium in the presence of water before removing at least a portion of the metals and HOC from the polluted medium.

Process, decontaminant and chemical kit for the decontaminating media polluted with metals and hydrophobic organic compounds

The invention concerns a method for stabilizing and conditioning wastewater sludge. The invention is characterized in that it consists in treating sludge in an acid environment (3.0&#x2266;pH&#x2266;5.0), with an inorganic acid and two oxidizing agents, that is a ferric iron salt and hydrogen peroxide. The ferric iron salt is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of Fe per ton of dry sludge; the hydrogen peroxide is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of HOper ton of dry sludge; mixing the treated sludge for a time interval sufficient to stabilize the sludge and improve its dehydrability; then flocculating the stabilized sludge by adding an organic polymer; then dehydrating the flocculated sludge. Said method enables to significantly improve the dehydrability properties of the sludge while increasing the dry solid content during its mechanical dehydration.

Method for stabilizing and conditioning urban and industrial wastewater sludge

Growing community of inventors

Beauport, Canada

Patrick Drogui