Wastewater Research and Innovation
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Increasing Capacity of Existing Volume
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.
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Sophisticated Clarifier Performance Modeling
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.
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Reducing the Costs of Aeration
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.
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The Increasing Importance of DON
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.
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Finding Flexibility in Carbon Supplementation
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.
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Controlling Froth Outbreaks
Our applied research is producing diagnostic tools and methodologies to predict digester froth events and develop specific operational and process control responses to mitigate and control digester froth.
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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. -
Video
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. -
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. -
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. -
[[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. -
Our applied research is producing diagnostic tools and methodologies to predict digester froth events and develop specific operational and process control responses to [[mitigate and control digester froth]].
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.
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.