Pathogen and Nutrient Removal during Wastewater Treatment at a 21st Century Wastewater Treatment Plant

Pepper, I. – The University of Arizona


A new wastewater treatment plant (WWTP) was commissioned in Tucson in January 2014.
This plant, Agua Nueva is unique in the United States in that it has dissolved air flotation
instead of conventional primary sediment, and also a 5-stage Bardenpho process for
nutrient removal (N&P) from the effluent. Finally, it has a large contact chamber for
chlorination that allows for a large Ct value for disinfection. A second modern WWTP (Tres
Rios) contains modified Bardenpho and Ludzack-Ettinger basins. In this presentation we
will report the influence of these new treatment trains on effluent quality with respect to
nutrient (N&P) content and pathogen removal (virus and fecal coliform). These two
parameters have important implications for both ecological and human health.

The Biosolids conference attracts the most authoritative global experts in the area of biosolids and organic resource handling, treatment and recycling. The programme covers both the latest innovations and updates of existing technologies. Presentations from respected industry experts and newcomers follow the development of technologies and legislation from inception to full-scale installations.

The conference regularly gathers over 200 delegates from all over Europe, many of them return every year both for the technical presentations and fantastic networking opportunities.

Regular conference themes include:

• Thickening and Dewatering
• Modelling Sludge Handling and Utilisation
• Commissioning and Operating Experiences with Thermal Hydrolysis
• Tackling Potential Odour Problems
• Operating Experiences and Potential Problems in Digester Operation
• Ensuring Optimum Energy Recovery from Biogas
• Liquor Treatment and P Removal
• Alternative Products from Sludge
• Enhancing the Value of Biosolids and Digestate
• Pathogens and Pollutants In Digestate
• Sharing Experiences

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