Liqui-Cel

Ammonia Removal

Ammonia Removal

Technical Briefs

TB 84: Capturing Ammonia in Flue Gas Condensate Treatment for Biomass Power Stations with Liqui-CelĀ® Membrane Contactors
Ammonia in wastewater discharge can be a significant cost and disposal challenge for power plants. Regulations, environmental concerns and the drive to increase water and energy use efficiency are leading to innovative ways in ammonia abatement. This brief provides an overview of how the TransMembrane Chemisoprtion process using Liqui-Cel(r) Membrane Contactors were incorporated into an integrated cleaning and recovery design that enabled the biomass plant to reduce NH3 from its flue gas condensate to meet discharge limits.

TB 74: Membrane Contactor technology is used to remove ammonia from industrial wastewater streams
This technical brief describes how Liqui-Cel Membrane Contactors can be used to remove ammonia from industrial wastewater. Compared to competing technolgies, they are more efficient and are able to remove and recover the ammonia in a useable form in a single step.

TB 43: Efficient Ammonia Removal using Modular Liqui-Cel Contactors
This is a case study where Liqui-CelĀ® degasifiers remove 95% of ammonia from a European industrial wastewater system.

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Transmembrane Chemisorption

The presence of ammonia in wastewater streams is a prevalent problem. Microelectronics chemical, power, municipal and many other industries face increasing regulatory and social pressures to recover water and reduce their environmental impact. As these regulations become more stringent and social pressures mount, manufacturers are looking at innovative ways to treat wastewater streams containing ammonia more efficiently and reduce discharge costs.

Transmembrane Chemisorption (TMCS) with membrane contactors (as shown in Figure 1) is an alternative solution for removing and recovering ammonia from wastewater. In the TMCS process, ammonia is stripped from the wastewater and converted to ammonium salt in a single process step. Depending on operating conditions, this technique can remove up to 95% of the free ammonia. 

Other ammonia removal processes may require excessive amounts of thermal energy, or require vast areas of land to maintain viable bio-processes. The ammonium salt product is cleaner, free of heavy metals, and safer to dispose of compared to a concentrated wastewater stream. In many markets, the ammonium salt may even have commercial value to help recoup operating costs.

Membrane contactors are small and compact, so minimal space is required for TMCS systems and since membrane contactors are modular they can be adapted to meet changes in process flows. System installations incorporating membrane contactors can occur rapidly.


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