Evaluation of the Anita-Mox Moving Bed Biofilm Reactor Process for Sidestream Deammonification at the Robert W. Hite Treatment Facility, Denver Colorado

Hollowed, Meg; Stec-Uddin, Edyta; Zhao, Hong; McQuarrie, Jim

doi:10.2175/193864713813525293

Cited by 4 publications

(5 citation statements)

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“…However, this scenario resulted in the air frequently switching on and off because the system did not naturally maintain a constant pH at a constant DO setpoint as shown in Figure 6. A similar observation was made at a pilot-scale demonstration in which the low pH air shutoff condition was repeatedly triggered as a result of aerating at a constant airflow (Hollowed et al 2013). As a result of these observations, an aeration control method was added in which airflow was controlled by a constant pH setpoint.…”

Section: Resultsmentioning

confidence: 71%

Startup of a Partial Nitritation‐Anammox MBBR and the Implementation of pH‐Based Aeration Control

Klaus

Baumler

Rutherford

et al. 2017

Water Environment Research

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The single-stage deammonification moving bed biofilm reactor (MBBR) is a process for treating high strength nitrogen waste streams. In this process, partial nitritation and anaerobic ammonia oxidation (anammox) occur simultaneously within a biofilm attached to plastic carriers. An existing tank at the James River Treatment Plant (76 ML/d) in Newport News, Virginia was modified to install a sidestream deammonification MBBR process. This was the second sidestream deammonification process in North America and the first MBBR type installation. After 4 months the process achieved greater than 85% ammonia removal at the design loading rate of 2.4 g /m2·d (256 kg /d) signaling the end of startup. Based on observations during startup and process optimization phases, a novel pH-based control system was developed that maximizes ammonium removal and results in stable aeration and effluent alkalinity.

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Section: Resultsmentioning

confidence: 71%

Startup of a Partial Nitritation‐Anammox MBBR and the Implementation of pH‐Based Aeration Control

Klaus

Baumler

Rutherford

et al. 2017

Water Environment Research

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“…As a comparison to other anammox processes, sidestream PNA design rates are typically 2–2.5 g N m −2 per day (ref. 38 and 53) where approximately half of the ammonia removal is due to anammox and half to aerobic AOB and temperatures are in the range of 30–35 °C. In the mainstream PdNA MBBR approximately half of the TIN removal is from heterotrophic partial denitrification to nitrite, and half from anammox if there is 100% PdN efficiency.…”

Section: Resultsmentioning

confidence: 99%

Comparison of carbon sources in a partial denitrification/anammox MBBR using glycerol, acetate, and methanol

Klaus

Campolong

Sabba

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…The average centrate alkalinity concentration between 2018 and 2020 was 3500 ± 300 mg/L as CaCO 3 and should provide sufficient buffering capacity for an average removal of 990 mg/ L of TAN based on pilot-scale studies carried out to aid the full-scale design. 12 Effluent alkalinity was 515 ± 280 mg/L as CaCO 3 . Overaerating the reactors may result in excess stripping of inorganic carbon and a subsequent reduction in the carbon source for AOB and AMX.…”

Section: Introductionmentioning

confidence: 95%

“…Operation with continuous aeration and constant airflow yielded relatively consistent total inorganic nitrogen (TIN; 56% ± 9%) and TAN (60% ± 9%) removal under conditions of variable centrate flow, influent TAN ranging from 700 to 1100 mg/L as nitrogen, and bulk dissolved oxygen. The average centrate alkalinity concentration between 2018 and 2020 was 3500 ± 300 mg/L as CaCO 3 and should provide sufficient buffering capacity for an average removal of 990 mg/L of TAN based on pilot-scale studies carried out to aid the full-scale design . Effluent alkalinity was 515 ± 280 mg/L as CaCO 3 .…”

Section: Introductionmentioning

confidence: 99%

Elimination of Complex Process Control Strategies in Single-Stage Deammonification

Coffey

Freedman²,

McQuarrie³

et al. 2021

ACS EST Eng.

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A full-scale ANITAMox deammonification system was commissioned by Metro Wastewater Reclamation District at the Robert W. Hite Treatment Facility in Denver, Colorado for sidestream treatment of recycle nitrogen loads in the centrate stream. The single-stage partial nitritation anammox process has operated for over three years, with an average of 60% total ammonia removal. The facility eliminated the complex pH-based cascade control strategy after 16 months of operation, opting for simplified feedback control of volumetric airflow rates. The impacts of airflow and biomass concentration on nitrogen removal capacity were unclear. Bench-scale studies investigated the effects of surface area loading rate of ammonia (SALR), bulk dissolved oxygen (DO), and aeration rate on total ammonia nitrogen (TAN) and total inorganic nitrogen (TIN) removal capacity. Bulk DO between 1.0 and 2.0 mg/L did not impact the surface area removal rate (SARR) of TAN. Analysis of full-scale data did not reveal correlations between SARR-TAN and pH or DO. Biofilm concentration, estimated by total solids attached to the media, accumulated until October 2018. After the first year of operation, SARR-TIN did not increase accordingly, with respect to biofilm concentration. Average TAN removal was 60%, despite variable nitrogen loading, pH, and dissolved oxygen concentrations in the ANITAMox reactors and fixed airflow at operator-defined set points. Stable performance was observed and more robust than expected, considering variations in pH, DO, and airflow rates.

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Evaluation of the Anita-Mox Moving Bed Biofilm Reactor Process for Sidestream Deammonification at the Robert W. Hite Treatment Facility, Denver Colorado

Cited by 4 publications

References 0 publications

Startup of a Partial Nitritation‐Anammox MBBR and the Implementation of pH‐Based Aeration Control

Startup of a Partial Nitritation‐Anammox MBBR and the Implementation of pH‐Based Aeration Control

Comparison of carbon sources in a partial denitrification/anammox MBBR using glycerol, acetate, and methanol

Elimination of Complex Process Control Strategies in Single-Stage Deammonification

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