Several North American government agencies and organizations share the responsibility of protecting the public’s health and safety while serving the best interests of water treatment facilities. Most water treatment facilities recognize that environmental protection is not just the responsibility of government agencies and organizations. In fact, most municipalities use the governmental regulations as guidelines to establish and maintain their own basic standards as best practices for water safety. Ferrate Treatment Technologies LLC (FTT) works with municipalities to follow such best practices. To complete a new water disinfection device’s design and meet the safety needs of municipalities, FTT partnered with a progressive cavity pump manufacturer that offered specialized metering pumps for their chemical handling challenges. Chemical metering pumps are actually not required to be National Sanitation Foundation (NSF) certified in disinfection systems, but as a critical component of a water treatment system process, pumps often come under careful scrutiny because they meter chemicals that could be harmful if not handled properly. Many objectives came into consideration, mainly meeting the governmental laws and regulations affecting drinking water processes. Deciding what type of pump technology to install for water and wastewater treatment applications can be a daunting task.
Government Regulation
- Protective barrier materials like paints or coatings
- Joining and sealing materials such as adhesives
- Mechanical devices
- Water meters or valves
- Plumbing and piping related devices
- Nonmetallic potable water materials
Case Study
Ferrate Treatment Technologies LLC (FTT) follows such best practices. Based in Orlando, Florida, the company was founded to invent, develop and commercialize water and wastewater treatment technologies based on its proprietary iron chemistry platform. FTT manufactures a water treatment system that produces ferrate, a water treatment chemical generated on site at water treatment facilities. Ferrate is synthesized in a temperature-controlled reaction using commercial-grade chemical feedstocks. When dosed into water as a liquid, ferrate acts simultaneously as a disinfectant, oxidant and coagulant and destroys most micro-organisms. These include inactivate micro-constituents such as endocrine disrupting chemicals (EDCs) and pharmaceuticals and personal care products (PPCPs). For municipalities requiring total NSF compliance, every component of FTT’s water treatment innovation had to comply with NSF/ANSI 61 standards, including the chemical metering pumps. FTT needed a pump technology that was both NSF/ANSI 61 certified and capable of reliably and precisely metering and blending the feedstock chemicals needed to produce ferrate. Several types of hose and diaphragm pumps are NSF-certified, but the company found that these pump types did not meet their requirements for consistent blending, steady flow and corrosion resistance. The initial design of FTT’s water treatment system included diaphragm pumps as the main pumping elements. However, pulsation and blending issues proved to be a problem. The diaphragm pumps were complex and prone to breakdowns. Vapor lock and valve leaks required expensive and time-consuming repair kits.NSF/ANSI 61 Certification
The National Sanitation Foundation offers a certification process for NSF/ANSI 61, or “Drinking Water System Components—Health Effects,” compliance. According to the foundation’s website, the process includes the assignment of a NSF project manager to guide companies through certification. The website also lists the seven steps of the certification process:- The company submits an application.
- Product formulation, use and toxicology information are provided.
- The NSF toxicology department reviews the formulations.
- NSF reviewers perform a plant audit and sample collection.
- An NSF laboratory tests the sample collection.
- A final toxicology evaluation is completed.
- NSF certification is granted for compliant products, and the NSF mark can be used on products, packaging and marketing materials.