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Waste Water Treatment and the Right Valve Selection
Waste water treatment is one of the industrial processes for improving the quality of waste water that takes place in waste water treatment plants. The quality of the waste water treatment technology depends on the suitability and quality of the installed valves, because sedimentation, flow control and treatment of thick and industrial waste water place much higher demands on the used materials of the valves than, for example, drinking water treatment. This is mainly due to their viscosity and the possible content of solid or abrasive particles.
Company ABO valve offers a wide range of industrial valves, knife gate valves, check valves and accessories that allow the operation, start-up, regulation and shutdown of the pumps and pumping systems, energy distribution – gases, vapors and other media and ensure their safe and regulated operation (manually or automatically). ABO valves are manufactured and offered in various material variants of the bodies, knives, discs and seats corresponding to the specific operating conditions. Depending on the transported and regulated medium, the valves are assembled with special types of seats, which ensures their resistance in controlling the relevant cleaning process. The fittings can be supplied with different types of actuators, which also increases the variability of their use.
Download full text: ABO valve offer for waste water treatment applications.
Waste water treatment technology
The first part of the wastewater treatment plant is the coarse pre-treatment, which serves to remove coarse impurities from the incoming water. Coarse material on the screen is separated here. Heavier particles settle in sand traps. Their design slows down the flow rate of waste water and the particles thus sediment. For this part of the technology, company ABO valve offers a complete range of knife gate valves Series 200 and 300. The inner construction of the knife gate valve seat prevents the sedimentation of deposits blocking the valve closing. The surface treatment of the body with a durable multilayer coating increases their resistance in a corrosive environment.
This is followed by a mechanical cleaning stage which ensures the separation of coarse or fine fractions of undiluted impurities in the waste water. This process takes place in sedimentation tanks. For drainage systems, a complete range of ABO concentric soft seated butterfly valves of the Series 900 is offered. Disc in stainless steel CF8M, according to specific operating conditions with Rilsan or Halar coating, ie coatings with high corrosion resistance and suitable for installations with the presence of chemical residues or for process waters with coarse impurities. The valves are offered as a standard with EPDM/NBR seats, for applications requiring resistance to mechanical wear we recommend a special FLUCAST seats.
It is also necessary to reduce the phosphorus concentration in the wastewater before the outflow. The precipitated phosphate forms flakes which settle in the sedimentation tanks. These are used to sediment the activated sludge from the treated water. Purified water is already draining from them, at which the respective concentrations of pollutants are observed. For applications containing aggressive media, company ABO offers VITON/VITON BIO seats.
They present good chemical resistance and ensure safe flow control. Sludge and gas management are also an integral part of wastewater treatment plants. Sludge is formed by sedimentation in sedimentation tanks and further by sedimentation of activated sludge in settling tanks. During the stabilization of sludge, biogas is developed, which is collected in a gas tank and subsequently used as an energy source for a given wastewater treatment plant. Distribution and transport of biogas is enabled by “974” valves with EPI (Epichlorohydrin) seat.
In the field of wastewater treatment, company ABO valve offers its customers complete deliveries of concentric soft seated butterfly valves of Series 900, tightness class A, knife gate valves of Series 200/300 (DN50-DN1200) and a wide range of check valves of Series 700/800/ART16/17 for the discharge of wastewater and sludge, as well as very coarse and fine sedimenting impurities, viscous substances and gases. The valves are supplied with complete engineering services. Based on the customer’s request, we are ready to prepare drawing documentation. We offer assembly services, or audits to assess the suitability of the installation on site at the customer. According to a specific request, we will make a price offer for the replacement of existing valves or maintenance of ABO valves. Complete product range of the company you can on the website: www.abovalve.com