Tech Reviews

Submerged Fixed-Film System Offers Efficient Treatment in Existing Basins

Demands to treat greater flows due to population growth or industrial production, in addition to increasingly stringent discharge permits, present a growing burden for wastewater treatment plants. Added complexities – such as budgets, space constraints and existing facility structures, as well as regional variations in temperature and rainfall – require treatment systems that can adapt to each application.

Case Studies

Strong Modules to Meet Strict Standards

The City of Stockton, Calif., needed to upgrade its 55-mgd wastewater treatment plant (WWTP) in order to meet National Pollutant Discharge Elimination System (NPDES) regulations for tertiary treatment. The goal of this upgrade was to select a reliable yet economical technology that would achieve tertiary nitrification, especially during the winter months.


Brentwood Introduces New Website

Brentwood has announced the launch of its new website ( on November 25, 2013. Its internal strategic team collaborated with Synapse Marketing Solutions to create a fresh, user-friendly site that provides an improved source of company, product and service information.  With integrated responsive design, the website will adapt to the size of the screen on which it is viewed, optimizing accessibility from desktop monitors, tablets and mobile devices. The new website can be navigated through four menus:

Case Studies

Small Town, Big Challenges

As a 3.4 mgd plant built in the 1920s, the Aqua America Tiffin, Ohio, drinking water treatment plant faced the challenge of producing high-quality drinking water. With a full measure of seasonal variety combined with the runoff from a thriving agricultural environment, the small-town facility constantly encountered adverse conditions. In a short time period, influent turbidity could fluctuate from 10 to 2,000 ntu. This “flashy” water source and the area’s stringent regulations posed frequent operational difficulties.

Case Studies

Feeling the Squeeze

When the Coldwater Board of Public Utilities in Coldwater, Mich., abruptly received new ammonia permit limits in August 2007, it hired consultants Fishbeck, Thompson, Carr & Huber, Inc. (FTC&H) to guide it to a solution. With a full measure of influent waste variety—residential, commercial, industrial and septage—and a new seasonal permit limit of 2 mg/L, Coldwater needed a budget-friendly solution to consistently perform through peak flows and industrial shock loading.

Tech Reviews

IFAS System Increases MLSS, Sludge Retention Time

Brentwood offers the complete AccuFAS Integrated Fixed-Film Activated Sludge (IFAS) system and provides process design assistance and engineering support to ensure optimum performance. The AccuFAS system consists of media modules combined to build media towers within an aeration basin. These media towers are typically 8 to 10 ft in height, 8 ft long and span with width of the basin. The media towers are supported by Brentwood’s pre-engineered AccuPier support system and secured to anchors in the concrete floor of the tank.