Wastewater Research and Innovation

We're helping a growing number of wastewater treatment facilities make the transition to being water resource recovery facilities, lowering their operating costs and distilling marketable products from the waste stream.

Many utilities face severe space constraints in evaluating candidate technologies to meet new regulatory challenges. Integrated Fixed-Film Activated Sludge (IFAS) allows plants to increase the treatment capacity of existing basins, meeting more stringent limits within the existing plant footprint.

For the 26th Ward WWTP in New York City, we designed the first separate centrate treatment wastewater facility in the United States utilizing glycerol as the supplemental chemical to remove nitrogen from wastewater.

Within the past few years, the sophistication of CFD models has increased dramatically, allowing engineers to incorporate factors such as hydrodynamics, flocculation, turbulence, and temperature in a clarifier, leading to more efficient designs and optimized plant operations.

HEET is a diagnostic and predictive tool that tracks energy consumption throughout each point in the treatment process. When used in conjunction with BioWin®, the tool provides the added value of simultaneous assessment of process operations and energy audits.

We’ve developed a dynamic energy model that quantifies decreasing performance over time of the fine-pore diffusers typically employed for aeration in municipal wastewater treatment that can be used for process optimization, reducing energy and other operating costs.

Flexible facility design that accommodates a number of different supplemental carbon sources offers Owners the opportunity to use market conditions to make cost-saving decisions. Our pilot and bench-scale tests and field examinations have helped many facilities more cost-effectively meet their nutrient limits.

Through applied research, we have developed innovative surface foam control measures, such as surface wasting, selectively remove foaming biomass from the secondary treatment system, preventing the establishment of a strong foaming population.

Wastewater treatment plants that use BNR have traditionally focused on the removal of inorganic Nitrogen species (ammonia, nitrite, nitrate) to meet their effluent TN standards. However, as TN regulatory limits get stricter, the importance of Dissolved Organic Nitrogen (DON) has increased.

As society’s waste stream grows and becomes more complex, many wastewater treatment providers face competing priorities – having to contain costs while upgrading their process and/or operating strategies to meet regulations.

Hazen and Sawyer conducts and sponsors innovative research that links the latest technical thinking to the needs of the industry, enabling us to deliver the most practical, efficient, and sustainable solutions to our clients. We utilize an extensive network of experts, including professors and academic institutions, governmental agencies, and engineers and scientists of the Firm to ensure that we provide our clients with well-balanced perspectives and solutions.

Whether it’s researching the importance of dissolved organic nitrogen (DON) in achieving the most stringent nutrient limits, applying Integrated Fixed Film in Activated Sludge systems (IFAS) to enhance nutrient removal without expanding infrastructure, testing leading diffusers to inform the development of cost-saving designs and operating strategies, or continuing to research how to best use the industry’s most tried-and-true tools, Hazen and Sawyer continues to push the limits of technology to help providers strategically and efficiently meet their current and future effluent requirements.