Optimization of simultaneous nitrification denitrification performance in different ENR process configurations

Helen Littleton, Glen Daigger, Hong Zhao, Peter Strom, Dan Noguera, Jianfeng Wen

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

2 Scopus citations

Abstract

This paper reports details of nitrogen balance and simultaneous nitrification and denitrification (SND) occurrence, including specific nitrification rate and half DO saturation coefficient under low DO conditions, in five different wastewater process configurations where total nitrogen (TN) consistently achieves 3-5 mg/l discharge limits without external carbon addition. It also examines the full scale, real time nitrogen load and nitrogen removal profile along the aeration basin via the online instruments at the Washington Sanitary Suburban Commission’s Seneca WWTP, MD, and Jefferson Peaks, NJ. Six months of full scale experiments at Seneca provide experience with a control strategy based on DO and air flow set point, ammonia and NOx measurements, and aerated swing zone volume for maximizing nitrogen removal. At Jefferson Peaks process control was limited by plant mixing condition and blower minimum VFD speed. The SND optimization, however, has been improved by minimizing DO spikes during low flow and no flow periods. The Seneca experience and successful application of the control strategy in European WWTPs could provide an opportunity for future process control automation based on continuous online DO and nutrient parameters. This paper provides insight on developing control strategies to optimize SND performance with different process configurations based on DO and air flow information, ammonia and NOx concentrations, as well as the variation of required aerobic volume that swings between aerobic and anoxic zones.

Original languageEnglish (US)
Title of host publication86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
PublisherWater Environment Federation
Pages3365-3388
Number of pages24
ISBN (Electronic)9781510870444
StatePublished - Jan 1 2013
Event86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013 - Chicago, United States
Duration: Oct 5 2013Oct 9 2013

Publication series

Name86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
Volume6

Conference

Conference86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
CountryUnited States
CityChicago
Period10/5/1310/9/13

All Science Journal Classification (ASJC) codes

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

Keywords

  • AOA
  • AOB
  • Dissolved oxygen
  • Minimum aerobic volume
  • NOB
  • Online analyzer
  • Oxygen uptake rate
  • Simultaneous nitrification denitrification

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  • Cite this

    Littleton, H., Daigger, G., Zhao, H., Strom, P., Noguera, D., & Wen, J. (2013). Optimization of simultaneous nitrification denitrification performance in different ENR process configurations. In 86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013 (pp. 3365-3388). (86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013; Vol. 6). Water Environment Federation.