RFICs

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  • Marki - MQH
    MMIC 40-110GHz Quadrature Hybrid: MQH-40110M2

    The MQH-40110M2 is a 40–110 GHz quadrature (90°) hybrid in our miniature M2-package enabling operation up to 110 GHz. 

  • Nucleus Biologics
    Human Growth Factor Concentrate: Physiologix™ XF SR

    Physiologix human growth factor concentrate is a cGMP, xeno-free media supplement for stem cells and T cells that replaces FBS or human serum in media formulations.

  • GettyImages-1441786721-mAb-Antibody-monoclonal
    High-Performance Protein A Resin For Protein And mAb Purification

    Praesto™ Jetted A50 is a high-performance agarose-based protein A resin that delivers exceptional performance in terms of capacity, pressure flow, and lifetime. Purolite is the only manufacturer of uniform particle size agarose resins.

  • MDF-DU502VXC_04_photo_ap3_920x920_v3
    PHCbi TwinGuard® -80℃ Ultra-Low Temperature Freezer: MDF-DU502VXC-PA

    PHCbi brand's 18.6 cu.ft (528L) ultra-low temperature TwinGuard freezer features a dual cooling system to offer our highest level of sample protection through the use of two independent refrigeration systems. The combination of these two circuits work together for fast temperature recovery while keeping ultra-low temperatures if one refrigeration system fails to cool. This freezer is ideal for safe, long term storage of your most high valued products, such as stem cells, embryos, cell lines, rare specimens, and other biological materials.

  • SealTight_Blog-image
    Silica SealTight Sleeves And Kits Line

    SealTight system securely connects capillary tubing to 10-32 coned ports using FEP sleeves, PEEK nuts, and ETFE ferrules, sealing up to 5,000 psi.

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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.