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  • HPLC Chromatography laboratory scientist GettyImages-1309780330
    Analytical & Quality Control

    Learn how robust in-house analytical services and protein characterization are crucial for successful development and manufacturing programs.

  • Natoli - NCF 45
    Automatic Pharmaceutical Capsule Filling System: NCF-45

    The Natoli NCF-45 Capsule Filling Machine offers unmatched speed, precision, and versatility for efficient powder and pellet encapsulation, maximizing your production output and minimizing waste.

  • hydroconn-series-iv
    HYDROCONN® Series IV

    Geospace Technologies offers a complete line of AMI water meter connector cables specifically designed and manufactured to meet the rugged requirements for in-pit, underwater applications. Geospace’s unique design ensures total moisture sealing for even the toughest underwater environments, yet they are easily re-entered for troubleshooting a transponder or for a meter swap-out. Versions are available that utilize molded-in-place or potted terminators for sealing. Either version is totally intermateable with the Itron Inline Connector.

  • Hull i-Dositecno Nasal Spray Filling Machine
    Pharmaceutical Nasal Spray Filling System

    For a nasal spray production fill-finish solution that offers unparalleled versatility, look no further! The Hull i-Dositecno BI and MI Nasal Spray Filling Machines simplify your manufacturing workflow to enable accurate and consistent rotary filling, stoppering and capping. With simple servo-driven motion-controlled design they can fill up to 50 or 200 units per minute (upm).

  • 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.