Wastewater treatment screening unit

rotaryfor bulk materialsfor wastewater

Primary screening separates and removes non-dissolved solid materials that could cause mechanical damage and blockages to the next treatment steps in the wastewater treatment plant. HOW DOES PRIMARY SCREENING WORK Influent wastewater passes through the slots (slot sizes 0.25-2.50mm) of a mechanical screen, and the solid waste that exceeds the dimension of the slot remains on the external surface of the rotating slot tube from where it is scrapped and falls down into a sludge container. Treated wastewater flows into inlet tank from where it is pumped to the next treatment step. EQUIPMENT NEEDED FOR WASTEWATER PRIMARY SCREENING Screening usually is the first unit operation used in all wastewater treatment plants, and its goal of wastewater primary screening is to provide initial level protection of the entire wastewater treatment equipment from mechanical damage, wear and clogging. Technology of wastewater screening include automated rotary screen filter and scraper unit. For wastewater primary screening, FlotLife delivers following equipment and services: • Rotary screen filter system • Automation of the system for on-site and remote monitoring and control • Installation, training and support • Maximum separation efficiency and low running- and maintenance costs: The cylindrical drum sieve, made from wedge wire or punched drum, allows the water to pass through and hold the coarse particles back by the outer drum surface and carry them in rotating movement to a scraper mechanism where they are removed. A time controlled drum scraper interaction prevents the build 
up of meat particles, peels, hairs, fibers, etc. which increases the separation efficiency.