• image
  • image
  • image
  • image
Previous Next
Screening

Screening is the first operation at any wastewater treatment works. This process essentially involves the removal of large non-biodegradable and floating solids that frequently enter a wastewater works, such as rags, papers, plastics, tins, containers and wood.

Efficient removal of these constituents will protect the downstream plant and equipment from any possible damage, unnecessary wear & tear, pipe blockages and the accumulation of unwanted material that will interfere with the required wastewater treatment processes.
Wastewater screening is generally classified into either coarse screening or fine screening. Screens may be manually or mechanically cleaned, with only the older and smaller treatment facilities using manually cleaned screens as their primary or only screening device. Coarse screens are typically used as primary protection devices, and usually have openings of 10mm or larger.

Fine screens are used to remove material that may cause operation & maintenance problems in downstream processes, particularly in systems that lack primary treatment. Typical opening sizes for fine screens are 3 to 10mm. With advances in screening technology, fine screens with openings of less than 3mm are now utilised to reduce suspended solids to levels near those achieved by primary clarification.
Most modern wastewater treatment plants will utilise a combination of coarse and fine screening (i.e. upstream coarse screens providing protection to downstream fine screens).

Most modern wastewater treatment plants will utilise a combination of coarse and fine screening (i.e. upstream coarse screens providing protection to downstream fine screens). Plants utilising mechanically cleaned screens will normally have a standby screen in place, which can be put into operation should the primary screening device be removed from service for maintenance reasons, or in the event of mechanical failure.

GAH Global, provides most comprehensive range of screening equipment for almost every application in Stainless Steel construction to suit the process requirement. The Screening equipment can be supplied for Light, Medium & Heavy duty services for positive debris removal from water / wastewater. The Screening equipment are fabricated and assembled in the production warehouse for adequate testing and then shipped to the customer.
The Screening equipment is designed for efficient and cost effective solutions with durable and dependable operations. Our application engineer will make sure that you get the correct type and size of the screening equipment available with us in various options for your specific job requirement. The screening equipments are available for all applications according to the specific job requirement.