Patents Assigned to OTU SA
  • System and method for treatment of acidic wastewater
    Patent number: 7438817
    Abstract: A wastewater treatment system comprising separation unit operations inhibits or promotes the formation and precipitation of species by controlling the pH of wastewater to be treated entering into the separation unit operations. The separation unit operations include first and second reverse osmosis devices. The first reverse osmosis device treats wastewater having pH that is less than about 3.5 and the second reverse osmosis device treats wastewater, from the first reverse osmosis device, having a pH that is about 6 or higher.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: October 21, 2008
    Assignee: OTU SA
    Inventors: Lnsp Nagghappan, Robert P. Helwick