VANGUARD Ammonia Abatement System

Ammonia abatement from a liquid waste stream typically includes the following:

• A countercurrent air stripper is used to liberate the ammonia from the liquid and convey the ammonia to the vapor form. These systems are commonly used with municipal or industrial sources where there are restrictions related to the disposal of ammonia.
• A reaction control system can be employed that constantly control the liquid waste to appropriate pH levels to insure effective liberation of ammonia from the liquid waste to the vapor exhaust.
• A booster fan draws the liberated ammonia vapor exhaust into the system at a fixed duct static pressure. From there, the contaminated gases are passed through the VANGUARD Ammonia Abatement System. The system is under constant negative pressure which eliminates fugitive leaks to the surrounding area. The resultant clean, gases are redirected either to the air stripper or are released to the atmosphere.
• After the Ammonia Removal Catalyst, a second stage of catalyst will be used to promote additional removal of ammonia and reductions of any potential NO + NO2 (NOx). Stage 1 is capable of providing +98% removal of NH3.
• A sparge system can be employed to utilize the ammonia rich process gas as NOx reducing reactant. The sparge system will use a blower to draw in the process gas as reactant and sparge this gas after the ammonia reduction catalyst and before the NOx reduction catalyst. The control of the sparge volume will be provided by a NOx and Ammonia analyzer.
• Integral Continuous Emission Monitor can be employed to precisely control the amount of reactant to used as sparge gas. This system helps to drastically lower both the NOx and ammonia slip.
• A water loop heat recovery system can be mounted after the VANGUARD Ammonia Abatement System which is designed to recover heat into the stripper liquid feed water. The heater will transfer heat energy to the LFW thereby improving the stripping efficiency.