Brentwood Industries, Inc.

Trickling Filter System



A time-tested technology, trickling filters offer a simple, cost-effective, energy-efficient treatment solution. With more than 500 trickling filter installations worldwide, Brentwood’s media and components have been optimized to guarantee the best performance for any application. By maximizing surface area in a given volume, Brentwood’s structured-sheet media provides an ideal environment for microorganism growth.

Brentwood media is rigorously tested for compression strength to ensure the structural integrity required for deep towers and demanding applications. Our dedication to quality and media performance is clear throughout Brentwood’s history with many installations in operation for over 20 years.

  • Maximizes surface area per unit volume
  • Creates even liquid distribution over biofilm
  • Allows air circulation through media
  • Provides drainage for excess biomass

Trickling filter applications vary based on media selection. Brentwood offers a variety of structured-sheet, plastic media configurations with differing flow patterns and surface areas to meet site-specific treatment objectives: BOD roughing, BOD removal, nitrification, and combined BOD removal and nitrification.


By combining high surface area with a maximum number of mixing points per unit volume of media, cross flow media facilitates superior process performance across a wide range of hydraulic wetting rates. The cross-corrugated modules provide continuous and uniform horizontal distribution of both air and water throughout the full media depth.


Media is also available in vertical flow configurations, which can be combined with cross flow media for superior solids flushing. Vertical flow media allows a thinner biofilm to be retained and minimizes biomass accumulation.


Fixed-film media is elevated above the concrete tower floors with a corrosion-resistant support system that can be customized for any application and engineered to maximize ventilation and drainage.


Interlocking panels provide a protective layer from foot traffic, hydraulic impact, and UV degradation on top of trickling filter media.

Customer reviews

No reviews were found for Trickling Filter System. Be the first to review!