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  • [发明专利]US19840583526 _ THE DOW CHEMICAL COMPANY 1984年02月24日
    It has now been found that certain phosphonate derivatives of bis(aminoalkyl) piperazines are good threshold agents to prevent metal ion precipitation in aqueous solutions. They also function as sequestering and/or chelating agents as do those which d...
  • [发明专利]US19840628763 _ WATER ENGINEERING AND PLANT CONSTRUCTION GTA REG. TRUST 1984年07月09日
    In a plant for the mechanical-biological treatment of sewage, an immersion element is rotatably mounted within a settling tank so that the element rotates about a horizontal axis. The immersion element includes a perforated outer tube and an inner tub...
  • 3.
    [发明专利]JP19840070659 _ CHISSO CORP 1984年04月09日
  • 4.
    [发明专利]JP19840144250 _ HITACHI LTD 1984年07月13日
  • 5.
    [发明专利]JP19840022116U _ 1984年02月18日
  • [发明专利]JP19840218088 _ TOTO LTD 1984年10月16日
    PURPOSE:To prevent the propagation of bacteria in an adsorptive filter medium when the purifier is not used by impressing a specified voltage on the adsorptive filter medium. CONSTITUTION:A voltage of 1.5-27 V is impressed on the inside of an adsorpti...
  • [发明专利]FR19840014385 _ EBARA CORP 1984年09月19日
    A membrane separator wherein a substance is separated out by employing a semipermeable membrane to obtain either a dilute or a concentrated solution or both. The most economical operation of the membrane separator obtains a maximum amount of a desired...
  • [发明专利]FR19840017975 _ PROJEKTIERUNG WASSERWIRTSCHAFT 1984年11月26日
    The invention relates to the conversion of organic compounds present in liquid decomposition products into stable reaction products. It is very particularly suited for the treatment of waste water and sludge. In accordance with the invention the org...
  • [发明专利]EP19840850351 _ CARLSSON, OLOF 1984年11月12日
  • [发明专利]EP19840106326 _ GESSLAUER, RUDOLF 1984年06月02日
    The purifier has a drinking water reservoir (1), a circulating line (2) connected thereto for the drinking water, and an ozone feed line (7) which opens into the circulating line and is connected to an ozone generator (6), the purifier being designed ...
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