RFICs

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  • Cell3iMager
    Imaging And Analysis System For 3D Cell Cultures

    The Cell3iMager series instruments are imaging systems that capture and analyze 2D and 3D cultured cells at high-speed using SCREEN’s unique optical system and image processing technology.

  • ColorConnect Color-Coded Precision Adapter
    ColorConnect Color-Coded Precision Adapter: CC Series

    ColorConnect™ precision adapters simplify compatibility and reduce equipment damage and downtime. They feature color-coded connectors for easy identification and are available with various types up to 67 GHz.

  • Cleanroom Scientists Using Tablet GettyImages-1341292153
    GMP mRNA And LNP-mRNA Manufacturing

    Easily scale your GMP mRNA projects

  • Used 15 Cu Ft AIM Pharmaceutical Ribbon Blender
    Used 15 Cu Ft AIM Pharmaceutical Ribbon Blender

    New 15 cu ft AIM Blending ribbon blender, model RB-15, 304 sanitary stainless steel construction with USDA grade #4 internal finish, 18 cu ft total capacity, 15 cu ft working capacity, approximately 25" wide x 48" long x 28" deep trough, double ribbon agitator, full hinged top cover, outboard roller bearings, sanitary split packing gland shaft seals, 6" center bottom outlet with manually operated slide gate discharge valve, 5 hp, 240/480 volt motor drive producing approximately 60 rpm shaft speed, on 304 stainless steel stand with approximately 17" discharge height, blender has been pre-wired for 240 volt, 3 phase, 60 hertz, including start/stop and E stop, serial# 015-411-SS-FG-RB-6S-2303-5VE, built 2023, New and Unused.

  • AMP20078
    1.0 - 6.0 GHz, 150 W Solid State High Power Amplifier: AMP20078

    The AMP20078 is a solid-state, high-power amplifier from Exodus Advanced Communication, purpose-built for EMI/RFI testing, laboratory work, continuous wave (CW), pulse, and communication applications across a broad frequency spectrum.

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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.