Water Reuse

One of the most critical environmental challenges in the 21st century will be developing a sustainable water supply. By necessity and by choice, we will reuse an increasing amount of water. The technology is readily available to do so and we have the expertise to help guide utilities in making energy efficient, sustainable choices to meet their water quality and water supply challenges.

We have developed tools for comprehensive evaluation (including triple bottom line, TBL) of potable and non-potable water reuse and other alternative water supplies.

We performed a third-party evaluation of the performance and operation of the Big Spring Raw Water Production Facility, one of two direct potable reuse plants currently in operation in Texas.

Hazen and Sawyer conducted indirect potable reuse pilot research in Hollywood (FL) to demonstrate acceptable emerging contaminant oxidation using treatment technologies that are more cost-effective and have a smaller carbon footprint than traditional options.

For the West Basin Municipal Water District in Carson, CA, we are providing technical support of the recycled water system and operations support for several facilities.

We have developed user-friendly master planning tools that provide a comprehensive view of potential reuse projects within a one-, three-, and five-mile radius of each plant across utility service boundaries.

Hazen and Sawyer is serving as lead investigator of two WateReuse Foundation projects aimed at monitoring control points and developing operational guidelines for DPR applications.

Our Advanced Water Reuse Treatment pilots for municipalities such as the City of Plantation solve challenges of nitrogen and phosphorous limits for aquifer recharge, disinfection, and contaminants of concern”.

For the East Bay Municipal Utility District's RARE Facility we are providing operations support and developing reverse osmosis membrane element replacement specifications, standard operating procedures, and cleaning procedures.

UCONN’s reclaimed water facility is tangible proof of its commitment to implementing sustainable solutions on campus, also providing a real-world educational facility to teach students and faculty about water reclamation and environmental sustainability.

We provided operations support at the Scottsdale Water Campus in Arizona, which uses microfiltration, reverse osmosis (RO), and ultraviolet (UV) treatment processes to recycle tertiary effluent for a variety of reuse applications, including golf course irrigation and aquifer recharge.

The award-winning OWASA/UNC Chapel Hill reclaimed water system meets the community’s non-drinking water needs in a sustainable way, easing strain on the drinking water supply and treatment capacity.

Hazen and Sawyer is providing fast-track planning, design, and construction administration for a 285-mgd high level disinfection (HLD) facility - the largest wastewater facility in the State of Florida that treats to stringent reclaimed water standards.

Our Reuse Feasibility Study identified a dual distribution system for green space irrigation as the most viable reuse opportunity for the City of Miramar, Florida.

For the last three decades, we’ve helped many utilities:

  • Reuse water for heating, cooling, and energy generation.
  • Recharge aquifers with recycled water for indirect potable reuse (IPR).
  • Reuse water for irrigation of green spaces.

As a Firm known for its superior technical abilities, we’ve worked to advance the science of reuse, developing a robust research portfolio that includes studying the most cost-effective process technologies to match water quality and treatment goals. Discovering more cost-effective process solutions will increase the viability of reuse for many utilities in areas desperate for water supply augmentation.

Hazen and Sawyer is also a leader in evaluating and developing advanced process solutions for direct potable reuse (DPR), indirect potable reuse (IPR), and non-potable water reuse. We developed an ozone advanced oxidation process for mitigating fouling in reverse osmosis (RO) membrane applications, and UV-chlorine advanced oxidation process for removal of pharmaceuticals and other contaminants of emerging concern. From the use of membrane bioreactors (MBRs) and RO membranes to membrane alternatives such as ozone and biologically active carbon (BAC), we have the solutions for your potable and non-potable water recycling needs.

More recently, we have helped clients overcome the barriers to direct potable reuse – an inevitability as our populations swell and our water supplies shrink – through both technological advances and research into the barriers to consumer acceptance seen in some communities. While technological expertise is crucial for engineering, equally important is the ability to communicate and build consensus within communities. Hazen and Sawyer embraces both aspects of water reuse and our staff maintain positions of leadership throughout the US and around the World.