Phosphorous Requirements in a Post Denitrification MBBR at a Combined Limit of Technology Nitrogen and Phosphorous Plant

Perić, Marija; Neupane, Dilli; Stinson, Beverley; Locke, Edward G.; Kharkar, Salil; Passarelli, Nicholas; Sultan, Martin; Shih, George; Murthy, Sudhir; Bailey, Walter; Carr, J.; Minassian, Rouben Der

doi:10.2175/193864709793954222

Cited by 5 publications

(6 citation statements)

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“…Average influent phosphorus was low due to efficient biological phosphorus removal in the full‐scale WWTP, so phosphorus was added to the PdNA MBBRs to ensure that it was not limiting for AMX and heterotrophic growth. Overall, average effluent OP concentrations in PdNA_PB and PdNA_V remained above the targeted 0.2 mgP/L, based on previous studies (Peric et al, 2009). However, there were still some periods where effluent phosphorus concentrations were below the target of 0.2 mgP/L due to operating errors, especially between days 75 and 120.…”

Section: Resultssupporting

confidence: 69%

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Schoepflin

Justin

Long

et al. 2022

Water Environment Research

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This study evaluated startup strategies for mainstream polishing anammox moving bed biofilm reactors (MBBRs) without anammox bacterial (AMX) biomass inoculation. Two types of startups were tested: anammox only (no external carbon addition) and partial denitrification/anammox (PdNA) with glycerol addition. Reactors were started with either virgin carriers or carriers with a preliminary biofilm from a mainstream aerobic integrated fixed‐film activated sludge (IFAS) process. Three pilot‐scale startups were completed under the following conditions: anammox‐only with preliminary biofilm carriers, PdNA with preliminary biofilm carriers, and PdNA with virgin carriers. AMX presence was confirmed via quantitative polymerase chain reaction (qPCR) after 57, 57, and 77 days, respectively. Prior to AMX detection, average influent concentrations of ammonia and nitrite ranged from 1.7–2.7 mg/L and 0.98–1.8 mg/L, respectively. This study demonstrated that AMX can be grown on carriers without AMX seeding under mainstream conditions (temperature 17–29°C, low ammonia and nitrite), regardless of whether nitrite came from upstream or partial denitrification within the reactor. This study also showed that using preliminary biofilm carriers can decrease startup time by approximately 1 month. These results address critical questions for moving mainstream anammox processes to full‐scale implementation, and suggest that PdNA MBBRs are feasible and sustainable for full‐scale ammonia, nitrate, and nitrite polishing to meet stringent total nitrogen requirements. Practitioner Points This research will help utilities develop methods for starting up mainstream anammox MBBRs without the barrier of anammox biomass seeding. Preliminary biofilm carriers accelerated startup time in a PdNA MBBR, but a virgin carrier reactor started up in a similar timeframe, contrary to expectations. Also, contrary to expectations, high concentrations of ammonia and nitrite are not necessary for startup of an anammox or PdNA MBBR.

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Section: Resultssupporting

confidence: 69%

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Schoepflin

Justin

Long

et al. 2022

Water Environment Research

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“…Potassium phosphate monobasic was also added to the glycerol stock to ensure that the MBBR had an effluent reactive phosphorus concentration greater than F I G U R E 1 Process flow diagram for PdNA MBBR and IFAS pilot 0.2 mg OP-P/L, which has shown to be a non-limiting concentration for denitrification in a MBBR (Peric et al, 2009).…”

Section: Methodsmentioning

confidence: 99%

Nitrogen removal capacity and carbon demand requirements of partial denitrification/anammox MBBR and IFAS processes

Justin

Long

Klaus

et al. 2022

Water Environment Research

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A pilot study was conducted to investigate the carbon demand requirements and nitrogen removal capabilities of two mainstream partial denitrification/anammox (PdNA) processes: a two‐zone, moving bed biofilm reactor (MBBR) process and an integrated fixed‐film activated sludge (IFAS) process. The first MBBR zone conducted PdNA, while the second operated as an anammox zone. Operation of the IFAS process was conducted in two phases. The first phase of the operation involved minor external carbon addition, while the second phase of the operation involved controlled external carbon addition. The MBBR process produced an average effluent TIN concentration and chemical oxygen demand (COD)/TIN ratio of 2.81 ± 1.21 mg/L and 2.42 ± 0.77 g/g. The average effluent TIN concentrations and COD/TIN ratios for the IFAS process were 4.07 ± 1.66 mg/L and 1.08 ± 0.38 g/g during phase 1 and 3.30 ± 0.96 mg/L and 2.18 ± 0.99 g/g during phase 2. Despite having relatively low and unstable partial denitrification (PdN) efficiencies, both mainstream PdNA processes exhibited low effluent TIN concentrations and carbon requirements compared to nitrification/denitrification. Successful operation of the PdNA IFAS process indicates that mainstream PdNA can be implemented with minimal capital costs in a water resource recovery facility's second anoxic zone. Practitioner Points Low effluent TIN concentrations can be maintained in mainstream PdNA MBBR and IFAS processes with low external carbon demand. MBBR and IFAS PdNA processes do not require consistent or high PdN efficiencies to maintain low effluent TIN concentrations. IFAS and MBBR PdNA processes exhibit similar TIN and NH3 removal efficiencies. PdNA can be implemented in a second anoxic zone, using IFAS technology for anammox retention, with minimal capital costs.

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“…Besides P for growth, soluble readily biodegradable COD must be made available for denitrification. Refer to the compendium for a detailed discussion on various pilot studies that investigated nutrient requirements (e.g., Peric et al ,2009). …”

Section: What Is Limiting Denitrification In Tertiary Denitrificationmentioning

confidence: 99%

Development of a WERF Compendium on Design, Operations, and Research Needs for Tertiary Denitrification Processes to Meet Low N & P Limits

Falk¹,

deBarbadillo²,

Liu³

et al. 2011

proc water environ fed

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Recent regulatory trends from federal and state agencies suggest that many wastewater treatment plants will be required to remove total nitrogen (TN) and/or total phosphorus (TP) in upcoming years. In many instances, the required effluent nutrient concentrations are low (<3 mg N/L; <0.1 mg P/L) and often exceed a technologies best achievable performance. This proceeding is derived from a WERF Nutrient Challenge compendium that focuses on tertiary denitrification processes. Typically, these processes are the last barrier in a treatment train. As a result, they present special challenges when attempting to meet low TN/TP levels. The designs are largely based on empirical experience and performance is variable. The objective of this study is to provide a baseline state of the industry document on key design/operational issues and identify research gaps and challenges in meeting low TN/TP levels.

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Phosphorous Requirements in a Post Denitrification MBBR at a Combined Limit of Technology Nitrogen and Phosphorous Plant

Cited by 5 publications

References 0 publications

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Nitrogen removal capacity and carbon demand requirements of partial denitrification/anammox MBBR and IFAS processes

Development of a WERF Compendium on Design, Operations, and Research Needs for Tertiary Denitrification Processes to Meet Low N & P Limits

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