PTG water technology featured in EPA's Guidelines for Water Reuse

Oct. 18, 2012
Pasteurization Technology Group (PTG), innovator of the only wastewater disinfection process that generates renewable energy, is profiled in the U.S. Environmental Protection Agency’s 2012 Guidelines for Water Reuse.

SAN LEANDRO, CA, Oct. 18, 2012 -- Pasteurization Technology Group (PTG), innovator of the only wastewater disinfection process that generates renewable energy, is profiled in the U.S. Environmental Protection Agency’s 2012 Guidelines for Water Reuse. Recognizing the need to provide national guidance on water reuse regulations and program planning, the publication provides comprehensive, up-to-date water reuse guidelines developed by the EPA in support of regulations and guidelines developed by states, tribes and other authorities.

“As many regions around the world are facing water scarcity, drought and rising energy prices, that Pasteurization Technology Group is included in the highly regarded EPA Water Reuse Guidelines is indicative of the cost benefits we provide to multiple industries that are looking for ways to reuse water -- a precious resource,” said Greg Ryan, chief executive officer and co-founder of PTG. “Of particular interest to those looking for an eco-friendly way to reuse water is that the EPA now recognizes PTG’s patented technology as one of the few acceptable methods for effective wastewater disinfection.”

Over 300 reuse experts, practitioners and regulators contributed text, technical reviews, regulatory information and case studies as a part of a two-stage technical review. In the publication, the EPA states that the field of reuse has expanded greatly over the past decade, and observes there is a need to address new applications and advances in technologies, as well as update state regulatory information. The publication includes PTG’s patented technology as one of the primary techniques for water disinfection, and discusses the energy-efficient benefits of PTG’s unique technology, which combines wastewater disinfection with renewable-energy generation:

"Favorable economics for pasteurization have been demonstrated in Ventura, Calif., where a 400 gpm (25 L/s) demonstration system has been constructed and is in continuous operation. Because of the high cost of power at this utility, pasteurization is projected to save several million dollars in lifecycle costs compared to UV disinfection (US-CA-Pasteurization)."
Source: 2012 Guidelines for Water Reuse, page 6-31 (U.S. EPA)

The EPA notes that PTG’s technology is a proven process for effective wastewater disinfection that has undergone rigorous testing, and that offers significant cost savings over other approaches by reducing energy consumption and eliminating the use of chemicals.

“We are incredibly pleased to be included in the EPA’s Guidelines for Water Reuse because the publication has far-reaching influence. This is both a validation at the highest technical levels as well as an indication of the rapidly growing customer acceptance of our technology,” commented Ryan. “We are also honored that the EPA highlights our large-scale municipal installation at Ventura Water as a case study in the publication.”

Ventura Water recently successfully completed the initial evaluation phase of a project to transition its wastewater treatment plant to a safe, non-toxic, sustainable technology to replace the current chlorine-based disinfection process in use at the Ventura Water Reclamation Facility. Current estimates are that Ventura Water will realize energy and operating cost savings of more than $750,000 per year by using PTG’s technology.

PTG's patented pasteurization process transforms treated wastewater into a valuable resource.

PTG’s technology is a highly efficient, cost-effective and sustainable solution that enables the reuse of valuable water. The technology is attracting the attention of businesses and municipalities that want to realize substantial energy cost savings and eliminate toxic chemicals through alternatives to traditional chlorine- and UV-based wastewater disinfection systems. PTG’s technology has been certified by the state of California for non-potable reuse under the stringent standards of Title 22. PTG is experiencing rapid growth as wastewater treatment plants face the challenge of cost-effectively disinfecting wastewater and trimming operating costs.

How the PTG system works

PTG is the first and only company in the world to combine wastewater disinfection with renewable-energy generation. PTG’s patented technology can use either the digester gas (often referred to as biogas, a natural by-product of wastewater treatment) or natural gas as fuel to drive a turbine or engine that generates renewable electricity. The hot exhaust air from the turbine or engine -- energy that is typically wasted -- is then passed through a series of heat exchangers that increase the temperature of the wastewater to a level that disinfects the wastewater stream. PTG’s technology is significantly more cost-effective and more energy-efficient than other methods. And, unlike other wastewater disinfection approaches, PTG’s systems do not require toxic chemicals (such as chlorine) or costly electrical power and expensive UV lamps. To learn more, visit the PTG website.

About Pasteurization Technology Group

California-based Pasteurization Technology Group (PTG) is a rapidly growing, VC-backed company that is revolutionizing the disinfection of wastewater. PTG’s systems feature its patented “two-for-one” technology that combines eco-friendly wastewater disinfection with the generation of renewable energy. PTG’s process is one of only a handful of technologies to pass the stringent standards of Title 22 in the state of California for the disinfection of water for reuse. By channeling the typically wasted exhaust heat from a turbine or engine to disinfect wastewater, PTG’s process is able to deliver the most energy-efficient and lowest-cost solution on the market. PTG has won numerous awards including the 2012 Artemis Top 50 Water Tech award and the Popular Science 2011 “Best of What’s New” award. For more information, see, and follow @pastechgroup on Twitter and Facebook at

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