Laboratory-scale investigation of integrated biological phosphorus removal and mainstream deammonification at the terrence j. O’brien water reclamation plant

Alex Rosenthal, Paul Roots, Fenghua Yang, Joseph Kozak, Heng Zhang, George Wells

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In collaboration with the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC), the environmental biotechnology research group at Northwestern University (NU) is conducting a laboratory-scale investigation of enhanced biological phosphorus removal (EBPR) integrated with mainstream deammonification using primary effluent as feed. The research presented here includes (1) A feasibility assessment of combining a high rate activated sludge (HRAS) process with EBPR (herein HRAS-P); (2) A feasibility assessment of mainstream deammonification without bioaugmentation in suspended growth and fixed film bioreactors; and (3) A demonstration of stable and efficient integrated HRAS-P + deammonification. After an extended period of variable phosphorus removal performance, HRAS-P discharged an average effluent ortho-P concentration of 0.5 mgP/L at an SRT of 2.5 days and an HRT of 4.8 hours. This was largely achieved through the implementation of sensor-based aeration control. Current results demonstrate the potential feasibility of mainstream deammonification, and also highlight the unique performance characteristics and challenges associated with biofilm and suspended growth deammonification reactors. Efficient retention of anammox biomass was a key advantage of the biofilm reactor, but nitrite oxidizing bacteria out-competition is an ongoing challenge for both. Suspended solids management techniques that achieve selective retention of anammox and ammonium oxidizing bacteria is a crucial ongoing focus for mainstream deammonification improvement.

Original languageEnglish (US)
Title of host publicationWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
PublisherWater Environment Federation
Pages3132-3144
Number of pages13
ISBN (Print)9781510863682
StatePublished - Jan 1 2017
EventWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017 - Chicago, United States
Duration: Sep 30 2017Oct 4 2017

Publication series

NameWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
Volume5

Other

OtherWater Environment Federation Technical Exhibition and Conference 2017, WEFTEC 2017
CountryUnited States
CityChicago
Period9/30/1710/4/17

ASJC Scopus subject areas

  • Pollution
  • Ecological Modeling
  • Environmental Chemistry
  • Waste Management and Disposal
  • Water Science and Technology

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