Matches 301 - 350 out of 400 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
3599794 PURIFICATION PLANT FOR AERATION OF SEWAGE  
A process and a purification plant for the aeration of sewage in an aeration tank with displaceable aeration means arranged close to the bottom of the tank.
3598236 SYSTEM FOR PURIFYING SEWAGE WATER BY MEANS OF FLOCULATION AND AERATION  
A system for purifying sewage water by flocculation and aeration using a buffer chamber, a flocculating chamber, a sedimentation and sludge concentration chamber and a regenerating and sludge...
3574331 AERATION TANK FOR WASTE TREATMENT  
The aeration tank in a plant for waste treatment by means of activated sludge is about 30 meters high and slender, and waste and oxygen-bearing gas are supplied to the bottom of the tank at the...
3547814 BIO-OXIDATION WITH LOW SLUDGE YIELD  
3547815 STAGED OXYGENATION OF BOD-CONTAINING WATER  
3547813 BIOCHEMICAL OXIDATION WITH LOW SLUDGE RECYCLE  
3546111 WASTE TREATMENT  
3537583 APPARATUS FOR PURIFYING WASTE WATERS  
3534857 EXPANDABLE AEROTOR PLANTS FOR TREATMENT OF SEWAGE AND INDUSTRIAL WASTES  
3535234 SEWAGE TREATMENT PROCESS AND APPARATUS  
3533508 ACTIVATED SLUDGE INSTALLATION WITH CONCENTRICALLY ARRANGED CIRCULAR TANKS WITH ONE CIRCULAR TANK AN AERATING TANK AND RAPIDLY RUNNING BRIDGE  
3495711 SYSTEM FOR TREATING SEWAGE WATER USING FLOCCULATION AND AERATION AS A MEANS THEREBY  
3489679 ULTRASONIC CLARIFICATION OF LIQUIDS  
3487937 SEWERAGE TREATMENT PLANT  
3485749 SEWAGE TREATMENT PROCESS AND APPARATUS  
3477581 SEWAGE DISPOSAL SYSTEM  
3472764 SEWAGE TREATMENT METHOD AND PLANT  
3468795 PROCESS AND PLANT FOR BIOLOGICAL PURIFICATION OF WASTE WATER AND SEWAGE  
3462360 WASTE TREATMENT  
3459659 WASTE TREATMENT PROCESS AND APPARATUS  
3459303 WASTE TREATMENT SYSTEM  
3448861 AEROTOR PLANTS FOR TREATMENT OF SEWAGE AND INDUSTRIAL WASTES  
3446357 CLARIFYING VESSEL FOR LIQUIDS  
3442386 PLANT FOR TREATING SEWAGE WATER  
3421626 SEWAGE TREATMENT SYSTEMS INCLUDING AN AERATING RESERVOIR AND A POST-SEDIMENTATION RESERVOIR SUPPLIED FROM SAID AERATING RESERVOIR  
3419146 Sewerage treatment plant  
3415381 Sewage treatment plants  
3412017 Sewage treatment  
3401797 Apparatus for treating aqueous waste  
3402125 Method for treating organic waste water with activated sludge  
3400822 Extended aeration sewage treatment plants  
3397789 Sewage treatment system  
3397788 Water treating apparatus  
3395799 Method and apparatus for the treatment of sewage  
3396102 Sewage treatment process and apparatus  
3394814 Sewage treatment including sludge disposal through digestion  
3389798 Apparatus for the biological purification of waste water  
3382981 Sewage treatment plant  
3374893 Sewage purification plant  
3366242 Treatment of sewage and like industrial wastes  
3338827 Apparatus and method for the purification treatment of liquids through flocculation  
3335865 System for sewage treatment  
3330413 Apparatus for biological purification of sewage water  
3313725 Apparatus and method for clarifying water  
3312346 Sewage treatment plants with movable partition  
3311239 Aerobic waste treatment system  
3305096 Sedimentation apparatus  
3298950 Liquid treating apparatus and method  
3295682 Sewage treatment apparatus  
3291309 System for the treatment of sewage or the like  
Matches 301 - 350 out of 400 < 1 2 3 4 5 6 7 8 >