YU83184A 
                (en )
               
            
            
           
          
            1987-06-30 
            
            
           
          Waste water treatment with multi stage, especially two stage process using activated sludge 
      
         
        
          
             
              
                EG18766A 
                (en )
               
            
            
           
          
            1994-10-30 
            
            
           
          Sewage treatment plant. 
      
         
        
          
             
              
                AU7156481A 
                (en )
               
            
            
           
          
            1981-10-26 
            
            
           
          Wastewater treatment process 
      
         
        
          
             
              
                AU587060B2 
                (en )
               
            
            
           
          
            1989-08-03 
            
            
           
          A process and an apparatus for the preparation of a disinfectant for water, such as drinking or swimming water 
        
         
        
          
             
              
                EP0599281A3 
                (en )
               
            
            
           
          
            1994-06-15 
            
            
           
          Process and apparatus for treating liquids by reverse osmosis. 
        
         
        
          
             
              
                AU8112387A 
                (en )
               
            
            
           
          
            1988-06-02 
            
            
           
          Process for wastewater treatment 
      
         
        
          
             
              
                EP0085111A4 
                (en )
               
            
            
           
          
            1984-06-29 
            
            
           
          
  ASSEMBLED SEMI-PLEASANT MEMBRANE, METHOD FOR THE PRODUCTION AND USE THEREOF.
 
        
         
        
          
             
              
                EP0272332A4 
                (en )
               
            
            
           
          
            1988-07-14 
            
            
           
          
        PROCESS FOR THE PRODUCTION OF CHLORINE.
       
        
         
        
          
             
              
                EP0198092A4 
                (en )
               
            
            
           
          
            1988-01-07 
            
            
           
          
  MAGNESIUM OR MAGNESIUM ALLOY WITH TREATED SURFACE, AND METHOD FOR TREATING THEIR SURFACE.
 
        
         
        
          
             
              
                DE3469887D1 
                (en )
               
            
            
           
          
            1988-04-21 
            
            
           
          Process for waste water purification 
      
         
        
          
             
              
                DE3173508D1 
                (en )
               
            
            
           
          
            1986-02-27 
            
            
           
          Pressurized aeration tank for activated-sludge process sewage treatment 
      
         
        
          
             
              
                AR243139A1 
                (es )
               
            
            
           
          
            1993-07-30 
            
            
           
          Metodo para el pretratamiento de materias primas para la formacion de vidrio y aparato para llevarlo a cabo. 
        
         
        
          
             
              
                ES8402237A1 
                (es )
               
            
            
           
          
            1984-01-16 
            
            
           
          Mejoras introducidas en el procedimiento de reduccion de la salinidad del agua de mar. 
        
         
        
          
             
              
                EP0182380A3 
                (en )
               
            
            
           
          
            1987-10-21 
            
            
           
          Process and apparatus for the biological treatment of water, especially for the denitrification of drinking water 
        
         
        
          
             
              
                EP0266425A4 
                (en )
               
            
            
           
          
            1988-09-28 
            
            
           
          
  AERATION TYPE WATER TREATMENT PLANT.
 
      
         
        
          
             
              
                HUT53843A 
                (en )
               
            
            
           
          
            1990-12-28 
            
            
           
          Process for water softening and electrolyzer for executing the process 
      
         
        
          
             
              
                GB2228930B 
                (en )
               
            
            
           
          
            1992-09-02 
            
            
           
          Sewage treatment process 
        
         
        
          
             
              
                RO100158A2 
                (ro )
               
            
            
           
          
            1991-10-25 
            
            
           
          Procedeu de epurare a apelor reziduale de la fabricarea zaharului 
        
         
        
          
             
              
                NO905208D0 
                (no )
               
            
            
           
          
            1990-11-30 
            
            
           
          Fremgangsmaate for behandling av vann ved samtidig flokkulering og adsorbsjon ved hjelp av partielt hydrofobe polyelektrolytter. 
        
         
        
          
             
              
                AU4895785A 
                (en )
               
            
            
           
          
            1986-05-08 
            
            
           
          Wastewater treatment process 
      
         
        
          
             
              
                ZA887848B 
                (en )
               
            
            
           
          
            1989-07-26 
            
            
           
          Method for introducing and bonding gas into water,apparatus for carrying out the method and water produced by the method 
      
         
        
          
             
              
                AU7245387A 
                (en )
               
            
            
           
          
            1987-11-05 
            
            
           
          Water treatment apparatus 
      
         
        
          
             
              
                PT72872A 
                (en )
               
            
            
           
          
            1981-05-01 
            
            
           
          Process for the treatment of reverse osmosis membranes 
      
         
        
          
             
              
                EP0183678A3 
                (en )
               
            
            
           
          
            1989-01-18 
            
            
           
          Process for the final treatment of molasses or vinasses, and apparatus for carrying out this process 
        
         
        
          
             
              
                PT84961A 
                (en )
               
            
            
           
          
            1987-06-01 
            
            
           
          Water treatment process - involves pre-oxidn. with air, oxidn. with sodium hypochlorite, flocculation and sepn.