Mechanical Aerators

Low and high speed (fixed or floating) Surface Aerators in horizontal or vertical spindle configurations.

The high speed surface aerator provides effective waste-water treatment in applications such as aerated lagoons, stabilization basins, SBRs, activated sludge, aerobic digestion and upgrades of existing systems


Sedimentation Tank Scrapers

The Tank Scrapers we offer are suitable for all types of circular and rectangular tanks. Some of the key features are

  • Few moving parts
  • Easy maintenance
  • No interruption of the sedimentation process
  • Continuous sludge transportation
  • Easy to install and adapt for use in existing tanks
  • High level of operational reliability
  • Sludge thickening function

Sedimentation Tank Scraper - Pollucen

Diffused Air Aeration Systems

This is an aeration device typically in the shape of a disc, tube or plate, which is used to transfer air and with that oxygen into sewage or industrial waste-water. Oxygen is required by micro-organisms/bacteria residents in the water to break down the pollutants.



Fine Bar Screens

Bar screens are typically at the headworks (entrance) of a waste-water treatment plant (WWTP), bar screens are used to remove large objects such as rags, plastics bottles, bricks and solids from the waste stream entering the treatment plant. Bar screens are vital to the successful operation of a plant, they reduce the damage of valves, pumps, etc. Floatables are also removed at the entrance to a treatment plant, these are objects that “float” on the surface of the water and if aren’t removed end up in the primaries or aeration tanks.

fine-bar-screen-1The spacing between Fine bar screens is usually between 1.5 mm through 6 mm. Fine bar screens are installed at some wastewater treatment plants that do not have primary treatment to minimized clogging of downstream liquid and solid processes. Fine bar screens have been used for “effluent polishing” which increases secondary effluent to tertiary effluent quality. They also are installed upstream of the trickling filters to minimize clogging and fouling of distributor nozzles.
Typically bar screens fall under two classification, mechanical bar screens and manual bar screens. Both manual and mechanical screens contain equally spaced vertical or inclined bars that span the width of a channel. Design considerations for both mechanical and manual screens include: bar spacing, bar size, geometry of bar, channel width, angle of screen and approach velocity.

Some plants still use manually cleaned bar screens, but because they are so labor intensive, the trend is to move toward mechanical bar screens. Mechanically bar screens are the more routinely used type because of their ability to operate automatically.fine-bar-screen

In addition to the vertical or inclined bars, mechanical bar screens are equipped with rakes or some type of cleaning mechanism for removing collected debris from the face of the unit. Once screenings are collected from the unit, they are usually de-watered and hauled away to a landfill.