Hydro International introduced Hydro MicroScreen technology for primary clarification and fine screening during WEFTEC in New Orleans, Sept. 26-28.
The Hydro MicroScreen rotating belt screen offers wastewater treatment plants an advanced and versatile alternative to a primary clarifier at a fraction of the footprint, power use and installation costs, according to the company.
“Already proven in other parts of the world, the Hydro MicroScreen is an effective alternative for removing TSS and BOD that is fully ready for U.S. operators,” says Marcia Sherony, national sales manager with the company’s Americas wastewater division. “The technology was formally recognized by Metcalf and Eddy as an alternative to primary clarification in 2014. We have taken this technology and developed and refined it.”
With its continuous rotating belt screen, the system separates solids from influent wastewater using just 10 percent of the footprint of a conventional primary clarifier and only 20 percent of the power, the company says. It is easy to install and saves the costs of building or refurbishing a primary clarifier.
The system achieves 50 to 60 percent TSS removal and gives operators versatility to improve downstream process efficiency. Operators can optimize effluent quality to improve nitrification with 20 to 40 percent BOD removal by removing particulate BOD. The process also offers up to 40 percent removal of FOG and up to 10 percent phosphorus reduction by removing phosphorus in particulate form.
“The Hydro MicroScreen busts the myth that the fine screening removes too many solids particles for optimum biological nutrient removal efficiency,” says Sherony. “By choosing from a range of screen sizes, engineers can customize the removal rate and favorably alter the ratio of soluble to total BOD in the effluent for optimum nitrification efficiency. The mechanical design also means quicker BOD consumption compared to conventional detention times.”
Operators aiming to optimize energy generation also benefit from a quality primary sludge for anaerobic digestion or gasification, the manufacturer says. With the optional addition of dewatering components, the system can produce up to 50 percent total solids without the use of chemicals.
The system can also be used for fine screening, grit removal in small plants, septage receiving and CSO/SSO screening. The technology is also proven for a wide range of uses in industrial applications. Visit www.hydro-int.com/contact.