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Emerging Technologies March 2013 Nutrient Removal prepared 2012 Technology Summary Ammonia Recovery (continued) Comparison to Established Technologies: Several technologies exist to remove ammonia including air and steam stripping as well as vacuum distillation. Any of these can be coupled with ammonia recovery as ammonium sulfate. Although the stripping technologies have been known since the 1960s they are rarely applied for ammonia recovery because the process is not economical. Struvite precipitation processes remove and recover ammonia along with the phosphorus target, but the ammonia removal is significantly less when compared to the 90% that is removed/recovered with vacuum distillation. Ammonia removal in municipal wastewaters is typically accomplished with biological processes that require oxygen, can require supplemental carbon, and produce sludge. Vacuum distillation can be shut down and restarted efficiently, so it is more suited to seasonal operation than biological processes for ammonia removal. More concentrated ammonia streams such as encountered in some industrial applications use breakpoint chlorination or air- or steam-stripping. Because it uses significantly less gas volume and operates at a lower temperature, vacuum distillation systems have a much smaller footprint and power requirement than steam or hot air stripping. Available Cost Information: Approximate Capital Cost: Equipment for 1.2-MGD centrate, approximately $14,000,000 (ThermoEnergy Corp, 2012). Approximate O&M Costs: Mainly depend on costs for sodium hydroxide and sulfuric acid consumed in the process. Vendor Name(s): ThermoEnergy Corporation (ARP) 323 Center Street Little Rock, AK 72201 Telephone: 508-854-1628, ext. 302 Email: info@thermoenergy.com Web site: www.thermoenergy.com Key Words for Internet Search: Installation(s): 26th Ward WWTP (1.2 mgd centate), New York City, NY (2012 startup) Agricultural facility large-scale pilot, Netherlands Vacuum distillation, ammonia recovery, nitrogen recovery, ARP, CASTIon, RCAST Data Sources: Kemp, Simon, and Brown, United States Patent 7,270,796, September 18, 2007. Orentlicher, M. et al. “Centrate Ammonia Reduction with ARP®: Pilot Data with Synthetic and Actual Wastewaters,” WEF/WERF Nutrient Removal Specialty Conference, 2009. ThermoEnergy Corp, direct communication, 2012. Snoeyink, V. and Jenkins, D. Water Chemistry, John Wiley and Sons, New York, NY, 1980. 2-30 Wastewater Treatment and In-Plant Wet Weather ManagementPDF Image | Emerging Tech for Wastewater Treatment
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