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; Kharkar, Salil; Passarelli, Nicholas; Sultan, Martin; Shih, George; Murthy, Sudhir; Bailey, Walter; Carr, John E.; Minassian, Rouben Der

doi:10.2175/193864709793901644

Cited by 5 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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: Influent and Effluent Characteristicssupporting

confidence: 53%

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Schoepflin

Justin

Long

et al. 2022

Water Environment Research

View full text Add to dashboard Cite

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.

show abstract

Section: Influent and Effluent Characteristicssupporting

confidence: 53%

Startup strategies for mainstream anammox polishing in moving bed biofilm reactors

Schoepflin

Justin

Long

et al. 2022

Water Environment Research

View full text Add to dashboard Cite

show abstract

“…Stinson et al [44] believed that when the concentration of NO 3 --N was low, the biomass in the MBBR would be relatively small. Second, during the entire experimental operation, the temperature of this study was around 25 • C, while Shrestha et al [48] and Peric et al [49] claimed that the biomass would decrease with the decreasing temperature. At low temperature, thick and numerous biofilms can be formed [50].…”

Section: No 2 --N and Nh 4 + -N Removalmentioning

confidence: 71%

Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Wang

et al. 2020

IJERPH

View full text Add to dashboard Cite

Nitrogen (N) remains a great challenge in wastewater treatment while attempts to remove N has continuously been a research point for decades. In this study, the long-term performance of four identical-shape denitrification MBBRs (moving bed biofilm reactors) with four different configurations of cylindrical polyethylene as carriers (Φ25 × 12, Φ25 × 4, Φ15 × 15, and Φ10 × 7 mm) for advanced N removal of real reverse osmosis concentrate was investigated in great detail. The N of the real concentrate can be effectively removed by denitrification MBBRs when the pH, temperature, hydraulic retention time (HRT), C/N ratio, and filling rate are 7.50–8.10, 24~26 °C, 12 hours, 6.6, and 50%, respectively. The results showed that the MBBR with the Φ15 × 15 poly-carrier had the best removal efficiency on NO3-–N (78.0 ± 15.8%), NO2-–N (43.79 ± 9.30%), NH4+–N (55.56 ± 22.28%), and TN (68.9 ± 12.4%). The highest biomass of 2.13 mg/g-carrier was in the Φ15 × 15 poly-carrier was compared with the other three carriers, while the genes of the Φ15 × 15 poly-carrier reactor were also the most abundant. Proteobacteria was the most abundant phylum in the system followed by Bacteroidetes and then Firmicutes. The entire experiment with various parameter examination supported that Φ15 × 15 poly-carrier MBBR was a promising system for N removal in high strength concentrate. Despite the lab-scale trial, the successful treatment of high strength real reverse osmosis concentrate demonstrated the reality of the treated effluent as possible reclaimed water, thus providing a good showcase of N-rich reverse osmosis concentrate purification in practical application.

show abstract

“…Effective full‐scale biological removal of phosphorus resulted in low influent phosphorus conditions to the pilot. On average, both IFAS reactors had effluent OP concentrations close to 0.20 mg‐P/L, which is considered to be sufficient for ensuring that denitrification is not limited in a tertiary MBBR (Peric et al, 2009). However, approximately half of the effluent OP measurements were below or equal to 0.05 mg‐P/L.…”

Section: Resultsmentioning

confidence: 99%

Comparing methanol and glycerol as carbon sources for mainstream partial denitrification/anammox in an IFAS process

Bachmann,

Parsons,

Klaus

et al. 2024

Water Environment Research

View full text Add to dashboard Cite

This study explored the implementation of mainstream partial denitrification with anammox (PdNA) in the second anoxic zone of a wastewater treatment process in an integrated fixed film activated sludge (IFAS) configuration. A pilot study was conducted to compare the use of methanol and glycerol as external carbon sources for an IFAS PdNA startup, with a goal to optimize nitrogen removal while minimizing carbon usage. The study also investigated the establishment of anammox bacteria on virgin carriers in IFAS reactors without the use of seeding, and it is the first IFAS PdNA startup to use methanol as an external carbon source. The establishment of anammox bacteria was confirmed in both reactors 102 days after startup. Although the glycerol‐fed reactor achieved a higher steady‐state maximum ammonia removal rate because of anammox bacteria (1.6 ± 0.3 g/m2/day) in comparison with the methanol‐fed reactor (1.2 ± 0.2 g/m2/day), both the glycerol‐ and methanol‐fed reactors achieved similar average in situ ammonia removal rates of 0.39 ± 0.2 g/m2/day and 0.40 ± 0.2 g/m2/day, respectively. Additionally, when the upstream ammonia versus NOx (AvN) control system maintained an ideal ratio of 0.40–0.50 g/g, the methanol‐fed reactor attained a lower average effluent TIN concentration (3.50 ± 1.2 mg/L) than the glycerol‐fed reactor (4.43 ± 1.6 mg/L), which was prone to elevated nitrite concentrations in the effluent. Overall, this research highlights the potential for PdNA in IFAS configurations as an efficient and cost‐saving method for wastewater treatment, with methanol as a viable carbon source for the establishment of anammox bacteria.Practitioner Points Methanol is an effective external carbon source for an anammox startup that avoids the need for costly alternative carbon sources. The methanol‐fed reactor demonstrated higher TIN removal compared with the glycerol‐fed reactor because of less overproduction of nitrite. Anammox bacteria was established in an IFAS reactor without seeding and used internally stored carbon to reduce external carbon addition. Controlling the influent ammonia versus NOx (AvN) ratio between 0.40 and 0.50 g/g allowed for low and stable TIN effluent conditions.

show abstract

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

Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

Comparing methanol and glycerol as carbon sources for mainstream partial denitrification/anammox in an IFAS process

Contact Info

Product

Resources

About