Fate of pharmaceutically active compounds in a pilot-scale A2O integrated fixed-film activated sludge (IFAS) process treating municipal wastewater

Gallardo-Altamirano, M.J.; Maza-Márquez, Paula; Pérez, Sandra; Rodelas, B.; Pozo, Clementina; Osorio, Francisco

doi:10.1016/j.jece.2021.105398

Cited by 24 publications

(7 citation statements)

References 78 publications

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“…The VSS of biofilm attached to the PE and NBPE carriers were achieved as follows: eight representative carriers were fetched from the aerobic tank of the IFAS system, diluted in 100 mL of deionized water, sonicated in an ultrasonic cell crusher (Ningbo, China) for 6-10 h until the biomass was vibrated from the PE carriers. Once the biomass was separated from PE carriers, the VSS of biofilm was measured according to the determination of MLSS and assessed through the total number of carriers in a liter of the reactor [18,43].…”

Section: Methodsmentioning

confidence: 99%

“…During the last decade, integrated fixed-film activated sludge (IFAS), which coupled MBBR technology and conventional BNR processes, has been recognized as a cost-effective technology to enhance nitrogen removal, improve process stability and increase the treatment capacity of the WWTPs [15][16][17]. The main advantage of IFAS processes is the coexisted of both quick-growth suspended and slow-growth attached microorganisms in the same reactor configuration [18,19]. Thus, the application of a suspended carrier in the BNR process allows having biomass with a longer SRT in the biofilm for enhancing nitrification and a shorter SRT in the suspended biomass for the biodegradation of organic substances.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

Liu

Zhuang

et al. 2022

Sustainability

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Integrated fixed-film activated sludge technology (IFAS) has a great advantage in improving nitrogen removal performance and increasing treatment capacity of municipal wastewater treatment plants with limited land for upgrading and reconstruction. This research aims at investigating the enhancing effects of polyethylene (PE) carrier and nitrifying bacteria PE (NBPE) carrier on nitrogen removal efficiency of an anoxic/aerobic (A/O) system from municipal wastewater and revealing temporal changes in microbial community evolution. A pilot-scale A/O system and a pilot-scale IFAS system were operated for nearly 200 days, respectively. Traditional PE and NBPE carriers were added to the IFAS system at different operating phases. Results showed that the treatment capacity of the IFAS system was enhanced by almost 50% and 100% by coupling the PE carrier and NBPE carrier, respectively. For the PE carrier, nitrifying bacteria abundance was maintained at 7.05%. In contrast, the nitrifying bacteria on the NBPE carrier was enriched from 6.66% to 23.17%, which could improve the nitrogen removal and treating capacity of the IFAS system. Finally, the ammonia efficiency of the IFAS system with NBPE carrier reached 73.0 ± 7.9% under 400% influent shock load and hydraulic retention time of 1.8 h. The study supplies a suitable nitrifying bacteria enrichment method that can be used to help enhance the nitrogen removal performance of municipal wastewater treatment plants. The study’s results advance the understanding of this enrichment method that effectively improves nitrogen removal and anti-resistance shock-load capacity.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

Liu

Zhuang

et al. 2022

Sustainability

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“…Gemfibrozil was reported as a recalcitrant. [12] Figure 4 Cumulative removal percentages of PhACs with AS+UV/H2O Placing UV/H2O2 after the AS, as shown in fig. 4, significantly improved the overall PhACs removal.…”

Section: Activated Sludgementioning

confidence: 99%

“…Thus, UV/H2O2 exposure, when conducted after biological processing, is capable of increasing total PhACs removal by up to 95% when compared to cases without. [13]…”

Section: Activated Sludgementioning

confidence: 99%

A review on effective removal of pharmaceuticals from aquatic systems: Advanced techniques and scope for future research

Yuvaraj¹

2023

Preprint

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Advances in medical research have led to a significant increase in the consumption and usage of pharmaceutical products. The chemical constituents of these products, including chemicals like tetracyclines, salicylic acids, sulphonamides and quinolones, are collectively known as Pharmaceutically Active Compounds (PhACs). Originating from domestic effluents, this micro-pollutant fails to degrade when processed by conventional methods. Accumulation of these treatment-resistant pharmaceutical compounds in soil and water bodies is dangerous, as they act as poisons to the natural environment. The aim of this study is to consolidate the investigated physical, chemical and biological methods for removal of PhACs.Microorganisms can facilitate the decomposition of PhACs and are often used in conjunction with membrane technology to effect what is known as Biological treatment. With minimal chemical addition and low energy requirements, it is the most cost-effective treatment plan. Emerging Biological treatment processes include: Membrane Biofilm Reactor (MBFR), Nanofiltration, Reverse Osmosis and Integrated Fixedfilm Activated Sludge (IFAS) Systems. Addition of chemicals can either break large molecules into smaller simpler compounds, or improve removal efficacies by forming flocs or a heavier particle mass. Physical methods generally do not succeed in complete remediation. Chemical processes include Fenton Oxidation, Photocatalysis and ozonation processes. However, there is a need to control the potential formation of byproducts as well as optimization of parameters to become competitive in economic terms. Thus, advanced techniques like Microbial degradation and Phytoremediation were explored.

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“…It also enhances the impact resistance of the system (influent loads, low temperatures, and toxic substances) (Singh & Kazmi, 2016 ). The long sludge age of the biofilm helps to retain slow‐growing microorganisms such as AOB and AnAOB in the system from flushing (Gallardo‐Altamirano et al, 2021 ). The hybrid system somewhat alleviates the competition between different microorganisms, and microorganisms with higher oxygen affinity, such as NOB and AOB are more likely to be enriched in the suspended sludge.…”

Section: Introductionmentioning

confidence: 99%

Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

Li,

Yu,

et al. 2024

Environ Microbiol Rep

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The integrated fixed‐film activated sludge (IFAS) process is considered one of the cutting‐edge solutions to the traditional wastewater treatment challenges, allowing suspended sludge and attached biofilm to grow in the same system. In addition, the coupling of IFAS with anaerobic ammonium oxidation (Anammox) can further improve the efficiency of biological denitrification. This paper summarises the research progress of IFAS coupled with the anammox process, including partial nitrification anammox, simultaneous partial nitrification anammox and denitrification, and partial denitrification anammox technologies, and describes the factors that limit the development of related processes. The effects of dissolved oxygen, influent carbon source, sludge retention time, temperature, microbial community, and nitrite‐oxidising bacteria inhibition methods on the anammox of IFAS are presented. At the same time, this paper gives an outlook on future research focus and engineering practice direction of the process.

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Fate of pharmaceutically active compounds in a pilot-scale A2O integrated fixed-film activated sludge (IFAS) process treating municipal wastewater

Cited by 24 publications

References 78 publications

Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

A review on effective removal of pharmaceuticals from aquatic systems: Advanced techniques and scope for future research

Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed‐film activated sludge (IFAS)

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