Purus (pure-us), a stormwater polishing system, provides the most advanced level of stormwater treatment and is designed for challenging stormwater conditions.
Purus Polishing is a category of stormwater treatment technologies for removal of small particulates, bacteria, organics or dissolved metals to low levels. Purus requires relatively clear inlet water generally having a TSS concentration less than 20 mg/L and are generally used downstream of Aquip filtration or another high-performing particulate reduction technology.
The Purus technologies can be applied individually or in a series. Purus polishing is typically able to reduce most pollutants to below the benchmarks or action levels. With this level of stormwater pollutant removal possible, the Purus system is ideal for industries where higher concentrations of specific pollutants are unavoidable or where more stringent or watershed-specific water quality standards apply. Purus requires nearly clear influent, so it is most often installed after the Aquip stormwater filtration system.
Flow matched to upstream treatment rates
Slip-stream treatment configuration available
Freeze protection available
Targets individual site-specific parameters
Removes trace pollutants in hard to treat applications
Purus basic is a pressurized fine filtration technology that shaves particulate pollutants down to a nominal particle size of 10 microns, 5 microns or even 1 micron. (There are 25,400 microns in an inch.) For pollutants that are present predominantly in ultrafine or colloidal particulate form, Purus basic may be sufficient polishing technology to get the target pollutants to the benchmarks or action levels. It is critical that Purus Basic technology include pretreatment if the TSS concentration is consistently greater than 20 mg/L. (Aquip is an ideal upstream technology to Purus Basic.)
Purus Metals is a pressurized media filtration process that targets specific ionized or dissolved metals, or specific categories of metals. Purus Metals is typically used downstream of Purus Basic or in certain cases can be used downstream of Aquip. Typically metal reduction through Purus Metals to below the benchmarks or action levels, with a margin of safety. StormwateRx engineers will work with your staff to identify the best media for your particular application and needs.
Purus Organics is a pressurized media filtration process that targets specific types of organic compounds including chemical oxygen demand (COD), biochemical oxygen demand (BOD), volatile organic compounds (VOCs), light hydrocarbons such as gasoline, as well as certain toxic organics such as PCBs and PAHs. Purus Organics will also remove metals that are attached to organic compounds. Purus Organics is typically used downstream of Purus Basic and upstream of Purus Metals. StormwateRx engineers will work with your staff to identify the best media for your particular application and needs.
Purus bacteria is a non-chemical gravity flow disinfection technology that kills bacteria, viruses and protozoa through a physical process. Stormwater bacteria disinfected by Purus Bacteria include e.coli, fecal coliform. Populations are normally disinfected to well below the benchmarks or action levels.
HOT DIP GALVANIZER, WA
Washington galvanizing site meets stormwater benchmarks for zinc with innovative stormwater design, Aquip basic filtration and Purus metals polishing.