You are here: Main page» Case Studies» Denitrification with Methanol in Urban or Municipal Wastewater Treatment Plants

Denitrification with Methanol in Urban or Municipal Wastewater Treatment Plants

Metering Pump for Denitrification with Methanol in Urban or Municipal Wastewater Treatment Plants

VANE-MAG® MPA – Corrosion-Resistant and Magnetically Coupled Stainless Steel Rotary Vane Pumps for Methanol Dosing

Denitrification is a process in wastewater treatment plants where nitrogen is removed from the wastewater. During this process, the nitrate content in the wastewater is reduced by converting nitrate into nitrogen gas. One method of carrying out denitrification in municipal wastewater treatment plants is by adding methanol as a carbon source.

In denitrification with methanol, methanol is added to the wastewater. The methanol molecules serve as a carbon source for the denitrifying bacteria present in the wastewater treatment process. These bacteria utilize methanol as an energy source and convert the nitrate in the wastewater into nitrogen gas. The resulting nitrogen gas is then released into the atmosphere, while the treated water undergoes further treatment to be returned to the natural water cycle.

The MPA rotary displacement pump from MARCH PUMPEN is highly suitable as a dosing pump for denitrification with methanol in urban or municipal wastewater treatment plants. This pump, made of corrosion-resistant stainless steel and the magnet drive, has proven its effectiveness in multiple applications.

  • Efficient Methanol Delivery: The VANE-MAG® MPA rotary vane pump is a precise and reliable rotary displacement pump that allows for controlled delivery of methanol. Accurate dosing of methanol is crucial to provide the optimal carbon source for denitrifying bacteria. The MPA pump ensures a consistent supply, facilitating the denitrification process.
  • Almost no Pulsation: The MPA pump series is characterized by almost no pulsation, meaning that the flow of methanol is laminar, smooth and without abrupt pressure changes. This is important to maintain a stable environment for denitrifying bacteria. A constant methanol supply improves the efficiency of the denitrification process and enables optimal nitrogen removal.
  • Reliable Performance: The MPA pump series, using carbon-graphite materials, is self-lubricating and, therefore, highly reliable and durable. In wastewater treatment plants that must operate continuously, a robust pump built to industrial standards is essential to withstand the demands. The MPA pump series provides a solid performance and minimizes downtime, contributing to efficient denitrification.

Another important point that highlights the suitability of MARCH MPA rotary vane pumps for denitrification with methanol in municipal or urban wastewater treatment plants is compliance with the ATEX directive, the use of a magnetic coupling, and meeting the requirements of TA-Luft.

  • ATEX Directive: The MARCH MPA sliding vane pumps meet the requirements of the ATEX directive, which means they are suitable for use in potentially explosive atmospheres. In wastewater treatment plants where flammable gases or vapors may be present, it is crucial that the pumps used adhere to appropriate safety standards.
  • Magnetic Coupling: The MPA sliding vane pumps utilize a magnetic coupling, which provides a tight seal between the drive and the pump. This eliminates the need for a mechanical seal that could wear out or cause leaks. The use of a magnetic coupling minimizes the risk of production downtime and ensures that no methanol vapors or liquids escape uncontrollably.
  • Compliance with TA-Luft Requirements: TA-Luft (Technical Instructions on Air Quality Control) is a German regulation that sets emission limit and leakage rate requirements. The MPA sliding vane pumps meet these requirements, ensuring that potential emissions of methanol or other substances during pump operation are kept to a minimum.

Thanks to these features, the MARCH MPA sliding vane pumps offer a safe, reliable, and efficient solution for methanol dosing in denitrification processes in municipal or urban wastewater treatment plants.

In summary, denitrification with methanol in municipal or urban wastewater treatment plants is a method of nitrogen removal. The MARCH MPA pump is well-suited for this process due to its efficient methanol delivery, low pulsation, and reliable performance. The VANE-MAG® MPA magnet-coupled sliding vane pumps have the advantage of being particularly effective in their hydraulic operation. These rotary displacement pumps, also known as rotary vane pumps or sliding vane pumps, are typically used to handle or precisely dose fluids with low lubrication properties.
The pump's rotor is equipped with vanes that move radially and press against the inner wall of the stator bore or the cam ring. This creates a narrowing space between the vane and stator during the rotor's rotation, which draws in the medium. As the vane continues to move, the medium is trapped between the vane and the pump housing and is transported to the pump's outlet by the rotation of the rotor. The vanes, stator, and axial bearing are made of carbon-graphite and exhibit excellent self-lubricating properties.

Rotary vane pumps are often used in applications requiring pulsation-free and continuous pumping of small quantities at high backpressure, such as in the chemical, food, and pharmaceutical industries. They are maintenance-free and have a long service life since they consist of few parts that do not easily wear under ideal operating conditions.