Advanced Thermal Ammonia Extraction
Ammonia extraction options of Stripping Systems
Thermal ammonia extraction provides a low-cost alternative to the use of carbon addition in a biological process. The thermal-stripper breaks the ammonium-ion bond with heat alone. This action converts ammonia into a gas, NH3, which can be driven from the liquid-phase with suitable quantities of air. Using this method, it is possible to achieve greater than 98.5% removal of ammonia in a single pass.
Advantages of the Organics Ammonia Extraction System
High-rates of Ammonia removal with a small plant footprint.
Residual Ammonia concentrations of as low as 10 mg/l with standard configurations.
Turnkey design, build and operate facilities.
Pilot plant trial facilities for new installations.
A range of instrumentation and control options
Ammonia Extraction Options
An alternative to destroying the stripped ammonia is extraction with the use of an acid scrubber. The Advanced Thermal Ammonia Stripper with Ammonia Salt recovery has been developed and patented by Organics to provide a fundamental option for disposing of, or benefiting from, ammonia removed from wastewater streams. Typically, nitric, sulphuric or phosporic acid may be used to create the ammonium ion salt. In this arrangement a thermal oxidiser for ammonia-gas destruction is not required. The single important input remains waste-heat with which to drive fracturing of the ammonium ion into ammonia gas. Such wasteheat can be taken from any suitable source, such as a gas engine’s exhaust, excess process steam or any other heat-source where energy is available for disposal. Once the process is commenced, the exothermic reaction encountered in salt formation offers the potential of significant energy savings.
The Advanced Thermal Ammonia Stripper with Ammonia Extraction has been developed and patented by Organics to provide another option for disposing of, or benefiting from, ammonia removed from wastewater streams. The ATASAR process provides the option of either ammonia extraction as an anhydrous liquid under pressure, or as ammonium hydroxide, held in water. The thermal oxidiser is replaced by a cold-water scrubber. The single important input remains wasteheat with which to drive the chemical reactions. Heat is required for both heating the feed into the ammonia stripper, as well as to drive the absorption chiller serving the cold-water scrubber. Such wasteheat can be taken from any suitable source, such as a gas engine’s exhaust, excess process steam or any other heat-source where energy is available for disposal.
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