RFICs

PRODUCTS

  • T cells GettyImages-956478348
    Cell Therapy CDMO Services

    Selecting a manufacturing partner who can manage all aspects of your product development lifecycle and associated supply chain is essential to improve efficiency and product quality.

  • 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.

  • Project Management GettyImages-1335717953
    Program & Project Management

    While there are industry standards for program and project management, each company has a unique culture and is at a different point in their product development journey. Verista's experienced team works with you to effectively manage and control your project, programs and portfolios.

  • WTG - CNG_EbNo_Persp
    SNR Noise Generator: CNG-EbNo

    The CNG-EbNo is a fully automated instrument that sets and maintains a highly accurate ratio between a user-supplied carrier and internally generated AWGN noise, over a wide range of signal power levels and frequencies.

  • QX ONE system
    Automatic, Multiplexed Digital PCR With The QX ONE ddPCR System

    The QX ONE ddPCR System is designed to deliver a precise and multiplexed digital PCR system. This system seamlessly integrates a standard ddPCR workflow of droplet generation, thermal cycling, droplet reading, and analysis into a hands-free precision platform.

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.