Wastewater Treatment – Screens

Wastewater treatment industry needs innovative, wise and cost effective solutions nowadays. The commonly used for liquid solid and solid reduction systems are bar screens and/or wastewater screens Comminutor. The automated wastewater treatment and head works systems are designed for reduced maintenance, low energy consumption, high process efficiency and built to last.

Bar screens are normally placed at the wastewater treatment plant (WWTP) head works or entrance. They are used to get rid of large objects such as rags, plastics bottles, bricks, solids, and toy action figures from the waste stream flowing through the treatment plant. Bar screen are essential to the successful plant’s operation because they lessen the damage of valves, pumps, and other accessories. Floatables or object that float on the surface of the water are also removed at the entrance to a treatment plant, if aren’t removed end up in the primaries or aeration tanks. There are many types of bar screens, and they are: manual, mechanical, trash racks (combination of manual and mechanical bar screen), chain, reciprocating rake, catenary and continuous belt bar screens.

Mechanical treatment is indispensable as the first process step of preliminary treatment of wastewater, both for STP inlets and other fields of application, such as process water treatment. Wastewater screens are used for liquid/solid separation when waste products are required to be filtered from water. Many of these applications include sewage treatment plants, fruit, vegetable, fish, poultry and meat processing, pulp and paper mills, sludge drying beds and aggregate washing systems.

Disturbing coarse material has to be removed in order to protect the subsequent steps against damage/pollution or to relieve them. It is the goal to completely separate floating, settling and suspended material, depending on the bar spacing, and remove the material prior to discharging it into a container. Wastewater screens is available in stainless steel and aluminum, in flat and curved models, with adjustable screen angle and observation window.