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The wastewater or raw water from rivers or seawater inlets contain large floating objects, fibrous material or other foreign objects which will cause problems for downstream treatment and pumping equipment. These no degradable objects have to be removed or they may lead to blockages, these objects are called screenings.
Manual bar screens may be adequate for smaller plants, however, mechanical screen is normally used to remove the screenings from the water.
Mechanical screen comes from different apertures and types. In terms of the aperture or size of the object that is to be removed, it is separated into fine screen and bar screen. Generally, we call all screens with an aperture less than 10mm diameter or gap for slot opening fine screens.
The choice of aperture will affect the quantity and quality of the screening captured. If using fine screeing in conjunction with a gravity flow system, faecal matter will be captured together with screenings. This has to be borne in mind when designing the screening handlig system. Aquatec Maxcon can offer various types of screening equipment to suit different applications.
Travelling belt type fine screen for water intake
Above Channel rotating Drum Screen
In channel Trommel Screen
Walking Step Type Fine Screen
Sieve Bend Static Screen
Rotary TypeInclined type
The choice of type of bar screen depends on the channel depth and width and preference for above water moving parts and headroom requirements. Engineers at Aquatec Maxcon can recommend a type of bar screen to suit your specific requirements.
Below are some of the specific product brochures that Aquatec Maxcon uses