Planta Compacta

Equipos compactos de pretratamiento

Por razones de seguridad de funcionamiento de las EDAR, el primer paso es el pretratamiento mecánico del agua residual para prevenir problemas en los procesos posteriores, tales como obstrucciones, desgaste o sedimentaciones.

El pretratamiento completo incluye:

  • Tamizado
  • Tratamiento del residuo de desbaste
  • Separación de arenas
  • Clasificación de arenas
  • Separación y extracción de flotantes y grasas

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La primera planta de pretratamiento se desarrolló y suministró en los años 80. Desde entonces, cientos de ingenierías y explotadores han seleccionado e instalado nuestras plantas compactas de pretratamiento por la fiabilidad en su funcionamiento, por sus bajos costes de mantenimiento y por el escaso espacio requerido. Nuestra planta compacta de pretratamiento ha ido mejorando continuamente, añadiéndose modelos y tamaños adicionales a los iniciales para ofrecer a los explotadores una óptima solución a sus problemas específicos.

La planificación e instalación de nuestros equipos compactos de pretratamiento no sólo es sencillo y rápido, si no que ahorra considerablemente costes de construcción.

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Details

Details

1. Fine screening

Depending on the specific conditions and data, such as peak flow, screenings load and grit load, one of the following screens is selected:

  • ROTAMAT® Fine Screen Ro 1: Bar spacing 6 or 10 mm
  • ROTAMAT® Rotary Drum Fine Screen Ro 2 / RPPS: Bar spacing 1 - 6 mm
  • ROTAMAT® Micro Strainer Ro 9: Bar spacing 1 - 6 mm
  • HUBER Belt Screen EscaMax®: Perforation 1 - 10 mm
  • STEP SCREEN® SSF: Slot width 3 / 6 mm

2. Screenings treatment

  • All ROTAMAT® Screens above include a screenings press. Screenings washing with (optional) dewatering and compaction. Solids concentration of screenings is up to 45 % DS.
  • For our STEP SCREEN® SSF and Belt Screen EscaMax® a separate Screenings Wash Press WAP is usually installed behind. Solids concentration of screenings, depending on the WAP type used is up to 50 % DS.

3. Grit separation
The grit channels of our ROTAMAT® Complete Plants are designed in accordance with international standards or the customer's specific requirements. The grit channels are availabe as aerated or optionally unaerated units. The selection of the grit channel type (aerated or unaerated) depends on various criteria, such as the storm/dry weather flow ratio or whether further grit treatment systems are planned.

4. Grit removal and discharge
The settled grit is collected from the bottom of the grit channel with a horizontal grit screw. An inclined grit screw conveys, agitates and dewaters the collected grit. The classified grit slides from the upper end of the inclined screw into a RoSF 4/t Grit Washer.

5. Grease separation and removal (optional)
Separation of fats and grease is only available when used with aerated grit channels. The grease is collected in a separate chamber with the partition between the grit trap chamber and grease chamber consisting of a slotted scum board. In contrast to many competitors, the floating fats and oils are skimmed off the water surface with a paddle scraper that is slowly pulled with a stainless steel rope. The paddle is shaped so that it removes virtually all floating matter from the grease trap. Anaerobic degradation of fat and grease, and therewith odor nuisance, is thus prevented.