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  • orange-county
    Disinfection

    As the final step before treated wastewater leaves the plant, effective disinfection is extremely important to protect human health, and the maintenance of the environment. This process eliminates pathogenic organisms that cannot be removed by previous treatment steps and reduces the spread of pathogens in the natural ecosystem.

    USP’s current offerings include our unrivaled in-house CFD modeling expertise that can be used to optimize the injection, mixing and feed rates of PAA to meet the disinfection requirements of a facility. Also, launching later this year, is our OaSys iCT™ is a novel control approach that optimizes disinfection performance by calculating the optimal chemical dosage that accounts for sources of treatment variability in real time. Available for use with PAA or chlorine.

  • Culture bioreactor
    Leverage Bioreactor Capacity When You Need It With Culture Bioreactors

    Gain access to Culture bioreactors when you need rapid overflow experimental capacity.

    Benefits

    Progress studies faster

    Run overflow projects and conduct parallel experiments with Culture to reduce time and alleviate bottlenecks.

    Stay agile in your capacity planning

    Scale your workload at Culture according to your current needs. Respond rapidly to surging demands.

    Eliminate your capital equipment spend

    Leverage Culture’s facility quickly to avoid building out lab space, spending capital on equipment, and hiring specialized staff.

  • teledyne
    HiRel Semiconductors Releases Wideband 50 GHz RF Switch

    Teledyne HiRel Semiconductors has announced the release of the TDSW050A2T, a high-performance, rad-tolerant RF switch designed for demanding aerospace and defense applications.

  • Koerber - Franz Ziel
    Pharmaceutical Isolator Glove Testing System (GTS) For Annex 1 Compliance

    The Isolator Glove Testing System enables for Annex 1 compliant wireless and tubeless leak testing of gloves installed in Isolators or RABS. The GTS with the latest software technology offers an extremely flexible and fully integrable solution for glove testing as part of glove management.

  • Turbidity Plus
    Turbidity Sensors

    Turner Designs turbidity sensors provide accurate, stable measurements of suspended particulates in natural waters. With low power requirements and a compact design, they integrate easily into process control or field platforms. Rated to 200 meters, these sensors support sediment transport studies, water clarity monitoring, and coastal change research, delivering reliable turbidity data in real time.

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About Nutrient Removal

Nutrient removal from wastewater consists of treating wastewater to remove nitrogen and phosphorus before it reenters natural waterways. High levels of nitrogen and phosphorus in wastewater cause eutrophication, a process where excess nutrients stimulate excessive plant growth such as algal blooms and cyanobacteria. The decomposition of the algae by bacteria uses up the oxygen in the water causing other organisms to die. This creates more organic matter for the bacteria to decompose. In addition, some algal blooms can produce toxins that contaminate drinking water supplies.

As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program regulates point sources, such as municipal wastewater treatment plants, that discharge pollutants as effluent into the waters of the United States. In recent years, many of the States’ environmental bodies have lowered nutrient limits to arrest eutrophication. Maryland’s effort to protect the Chesapeake Bay and its tidal tributaries is perhaps the most notable example of nutrient removal in the US. Nutrient removal continues to be a growing area of focus for wastewater treatment throughout the world.   

The removal of nitrogen and phosphorus require different nutrient removal processes. To remove nitrogen, the nitrogen is oxidized from ammonia to become nitrate through a process called nitrification. This process is then followed by denitrification where the nitrate is reduced to nitrogen gas which is released to the atmosphere and removed from the wastewater.

Nitrification is a two-step aerobic process which typically takes place in aeration tanks. Denitrification requires anoxic conditions to encourage the appropriate biological conditions to form. The activated sludge process is often used to reduce nitrate to nitrogen gas in anoxic or denitrification tanks.

Phosphorus can be removed biologically using polyphosphate accumulating organisms (PAOs) which accumulate large quantities of phosphorus within their cells and separate it from treated water. Phosphorus removal can also be achieved by chemical removal. Once removed as sludge, phosphorus may be stored in a land fill. However, many municipalities and treatment facilities are looking to resell the biosolids for use in fertilizer.