For lower air flow rates and sites requiring a smaller system footprint, Envirogen modular biofilters deliver reliable, cost-effective performance. These engineered pre-fabricated fiberglass systems come in a range of standard configurations and can be adapted to flow and loading requirements. They can be shipped with all media pre-installed are easily installed at the site. Our modular industrial modular biofilters (I, H Series) can handle from 100 to 8,350 cfm air flows based on size and loading. The I-series modular biofilters feature internal humidification and irrigation systems.

Envirogen biotrickling filters are vertically-oriented vessels filled with an inorganic media featuring 100% water recirculation. Their unique design can address high concentration of H2S odor control in areas where space is at a premium – offering a shorter retention time and higher throughput than a conventional biofilter. They can also treat high concentrations of VOCs and be chemically augmented when needed. The recirculation water maintained in the tower allows for optimal control of pH, nutrient levels and biofilm thickness. In some applications, an intermittent, single-pass irrigation system can be supplied, eliminating the need for a recirculation pump.

The result of 20 years of research, design and operating experience, Envirogen’s biotrickling filter designs and integrated biofilter technology systems are some of the most technically advanced solutions for low- to moderate-flow applications available. These systems combine the high performance of a biotrickling filter in removing H2S, with the VOC and reduced sulfur compound efficiencies of a biofilter in a single, pre-fabricated fiberglass system that offers ease of installation and a small system footprint. One of the design advantages of the integrated Biotrickling and biofilter system is that it can be configured to offer multiple zones of treatment – for efficient and cost-effective management of complex air streams.

Envirogen built-in-place systems are custom made biofilter technology systems designed for mid- to high-air flow VOC and odor control applications. Installations are based on standardized multi-bay designs and system components to lower installed costs for air flows ranging from 1,000 to 72,000 cfm. They can be configured with both biofilter and biotrickling designs for multi-zonal treatment. Envirogen built-in-place biofilters are intended for centralized treatment solutions and are ideal for emissions control in industrial manufacturing applications.