RFICs

PRODUCTS

  • PBS Biotech - PBS-1 bioreactor
    Mini Vertical-Wheel Bioreactor: PBS-0.1

    The PBS-0.1 Mini single use bioreactor is compatible with 60mL-100mL working volumes and is the best starting point for optimizing cell therapies by leveraging the benefits of Vertical-Wheel mixing that can be easily scaled up for larger volumes.

  • Marki - C10-2800WG
    WR-28 (26.5-40 GHz) 10dB High Directivity Coupler: C10-2800WG

    The C10-2800WG is a WR28 10dB waveguide coupler featuring high directivity over a 26.5-40GHz operational bandwidth.

  • PTXM1069
    Broadband Microwave Power Module: PTXM1069

    The PTXM1069 is an ultra compact modular microwave power module with an integrated “Super Mini” travelling wave tube (TWT), a solid state preamplifier, and an optimized high-density switch mode power supply to produce a single “drop-in” microwave amplifier block.

  • lee company pump
    Dual Seal Variable Volume Precision Dispense Pump

    The Dual Seal Variable Volume Precision Dispense Pump is a robust, stepper motor-driven positive displacement pump designed for reliable dispensing of complex fluids, including those with high surfactant content or crystallization tendencies.

  • Getty Images-1087219418-fill-filling
    Injectable Drug Manufacturing

    From the production floor to the shipping door, your unique clinical or commercial requirements will be fulfilled at each step of the process.

WHITE PAPERS AND CASE STUDIES

NEWS

ABOUT

 

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.