Projects to utilize H-series modular packaged biofilters in various configurations
Envirogen Technologies Inc. has been awarded new contracts for odor control systems at municipal wastewater facilities in Portsmouth, Ohio; Oak Island, N.C.; and Crested Butte, Colo., based on its biofiltration technology. All three projects will utilize Envirogen’s H-series modular packaged biofilters in various configurations to provide a minimum 99% removal of hydrogen sulfide (H2S) from inlet air. The Crested Butte installation will also remove ammonia (NH3) and meet specifications for operating in temperatures down to -30°F.
Designed to customer specifications by Envirogen using standardized components, the compact systems will include all required blowers, irrigation equipment, feed tanks, controls, proprietary media and nutrients. Envirogen will also provide installation oversight and staff training services to ensure trouble-free operation at startup. Nationwide, Envirogen has installed more than 150 biofiltration systems for odor control.
“Increasingly, both industry and municipal utilities are recognizing the operational efficiencies of biofiltration and its ability to deliver safe, reliable and sustainable odor control at a low cost,” Enegess said. “We design these systems to operate on minimal energy and negligible chemical usage. They fit into a small footprint and provide many years of dependable odor control. With over 150 of these systems in place and more than a dozen new start-ups in the past year with more to come, we feel that Envirogen’s faith in this technology as a ‘best solution’ to customer needs has been more than justified.”
Envirogen offers a variety of biofilter products to handle air flows ranging from 50 to 100,000 cu ft per minute (CFM), including built-in-place systems for mid- to large-flow applications and its P-series and H-series modular packages for lower flow rates. The contracts from Portsmouth, Oak Island and Crested Butte all specify dual or triple H-series biofilters designed for 99% removal of H2S at flow rates from 1,360 to 2,200 CFM. The Crested Butte installation will add an ammonia scrubbing step to reduce NH3 to 5 ppm or less at discharge, and will also be specially insulated to handle the cold climate of the Colorado Rockies (down to -30°F).
According to Enegess, the benefits of Envirogen’s biofiltration technology fit neatly with today’s focus on environmental sustainability.
“Biofilters are a truly innovative ‘green’ technology because they provide long-term, trouble-free service without a lot of attention or maintenance, while eliminating the potential negative impacts of high chemical and energy usage,” Enegess said. “Even with these significant environmental gains, biofiltration still comes through as one of the lowest-cost and most dependable odor control options out there for many applications. We at Envirogen look forward to being at the forefront of this technology as it moves toward becoming the new industry standard for odor control.”