Removal of organic micropollutants from municipal wastewater by aerobic granular sludge and conventional activated sludge

Burzio, Cecilia; Ekholm, Jennifer; Modin, Oskar; Falås, Per; Persson, Frank; Erp, Tim van; Gustavsson, David; Wilén, Britt‐Marie

doi:10.1016/j.jhazmat.2022.129528

Cited by 27 publications

(13 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While in this study a positive influence by anoxic conditions was observed, no clear trend was seen in other studies because of generally low elimination ratios (Falås et al, 2013; Suarez et al, 2010). Accumulation stated in literature was observed under aerobic conditions (Blair et al, 2015; Burzio et al, 2022), supporting this study's results.…”

Section: Resultssupporting

confidence: 90%

“…With similar initial concentrations of 4.9 to 6.8 μg/L, an influence of HRT that can be seen as a higher elimination of 66% was achieved for both phases 1 and 3 with an HRT of 14 days in comparison to phase 2 (HRT = 7 days). Results obtained within this study are higher than the degradation rates of 0–40% (often < 20%) observed in many lab experiments as well as municipal water resource recovery facilities under different COD/N ratios and process conditions (Abegglen et al, 2012; Ahmadi et al, 2023; Burzio et al, 2022; Clara et al, 2005; Falås et al, 2013; Fernandez‐Fontaina et al, 2016; Joss et al, 2006; Luo et al, 2014; Margot, 2015; Sturm et al, 2022; Suarez et al, 2009). Only a handful of studies show higher elimination ratios.…”

Section: Resultscontrasting

confidence: 60%

“…A small increase in elimination ratio in phase 3 can rather be explained with an increase in initial concentration than the increase in HRT. Elimination ratios observed in this study are rather high in comparison to literature, where values < 25% are stated (Abegglen et al, 2012;Behera et al, 2011;Margot, 2015;Sturm et al, 2022), with Burzio et al (2022) even showing an accumulation. In contrast, Wellbrock et al (2019) observed a MET average elimination of 75% in activated sludge systems with higher initial concentrations, and further studies stated elimination in ranges of 30% to 80% (Jelic et al, 2011;Luo et al, 2014;Verlicchi et al, 2012).…”

Section: Overall Elimination Per Experimental Phasecontrasting

confidence: 72%

“…In phase 1, average initial (0.42 μg/L) and end concentrations (0.5 μg/L) of CMP‐10,11 were close to LOQ (0.1 μg/L), leading to a rather small retransformation, whereas a fecal particle release is to be excluded as the concentrate was produced from secondary clarifier effluent. CMP is often stated as persistent with several researches showing no or low elimination ratios of < 20% for attached and suspended growth systems (Abegglen et al, 2012; Ahmadi et al, 2023; Burzio et al, 2022; Falås et al, 2013; Margot, 2015; Suarez et al, 2010). Within this study, average end CMP concentration of 2.1 ± 0.23 μg/L is 19% lower than initial concentration, thus being in range of literature.…”

Section: Resultsmentioning

confidence: 99%

“…In phase 1, CMP-10,11 accumulated whereas CMP was fluctuation < 5% removal. While no comparison data is available for CMP-10,11, an accumulating behavior for CMP was seen by Blair et al (2015) and Burzio et al (2022), most likely taking place because of a release from fecal particles or retransformation to parent compound (Blair et al, 2015). In phase 1, average initial (0.42 μg/L) and end concentrations (0.5 μg/L) of CMP-10,11 were close to LOQ (0.1 μg/L), leading to a rather small retransformation, whereas a fecal particle release is to be excluded as the concentrate was produced from secondary clarifier effluent.…”

Section: Micropollutantmentioning

confidence: 99%

See 4 more Smart Citations

Removal of emerging micropollutants from nanofiltration retentate of municipal wastewater within biological fixed‐bed reactors under nitrifying and denitrifying conditions

Stricker,

Tamim,

Rechtenbach

et al. 2023

Water Environment Research

View full text Add to dashboard Cite

Municipal water resource recovery facilities are not designed to eliminate micropollutants, leading to many pollutants entering the aquatic environment. Within this study, as part of the project MicroStop, the biological treatment of nanofiltration effluent (retentate) under pure aerobic (without nitrification) as well as nitrifying and denitrifying conditions has been investigated for micropollutant elimination. A potential of further biotransformation under increased hydraulic retention time (HRT) of 14 days was shown. Under both HRT of 7 and 14 days, eliminations below LOQ were achieved in the aerated bioreactor for gabapentin, iomeprol, and metoprolol, reaching > 95%, > 69 to > 92%, and > 72%, respectively. The reduction of diclofenac was positively influenced by longer HRT leading to an elimination of up to 67%. Sulfamethoxazole was reduced under denitrification, but accumulated under aeration, resulting in fluctuating results and an overall elimination of 78% under 14 days HRT.Practitioner Points The micropollutant elimination in fixed‐bed bioreactors of highly concentrated nanofiltration retentate was studied. Pure aerobic (without nitrification), nitrifying, and denitrifying conditions were investigated under hydraulic retention times (HRT) of 7 and 14 days. Higher initial pollutant concentrations enhanced the biological degradability in attached growth for substances being moderately degradable in activated sludge systems. 4A potential of further biological micropollutant elimination was shown for gabapentin, iomeprol, metoprolol, and diclofenac.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultscontrasting

confidence: 60%

Section: Overall Elimination Per Experimental Phasecontrasting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Micropollutantmentioning

confidence: 99%

See 3 more Smart Citations

Removal of emerging micropollutants from nanofiltration retentate of municipal wastewater within biological fixed‐bed reactors under nitrifying and denitrifying conditions

Stricker,

Tamim,

Rechtenbach

et al. 2023

Water Environment Research

View full text Add to dashboard Cite

show abstract

Organic Micropollutants in Wastewaters: Advances in Sustainable Management and Treatment Methods

Sawicka,

Messaoudi,

Vambol

et al. 2024

Organic Micropollutants in Aquatic and Terrestrial Environments

View full text Add to dashboard Cite

Microbiome structure and function in parallel full-scale aerobic granular sludge and activated sludge processes

Ekholm,

Persson,

de Blois

et al. 2024

Appl Microbiol Biotechnol

Self Cite

View full text Add to dashboard Cite

Aerobic granular sludge (AGS) and conventional activated sludge (CAS) are two different biological wastewater treatment processes. AGS consists of self-immobilised microorganisms that are transformed into spherical biofilms, whereas CAS has floccular sludge of lower density. In this study, we investigated the treatment performance and microbiome dynamics of two full-scale AGS reactors and a parallel CAS system at a municipal WWTP in Sweden. Both systems produced low effluent concentrations, with some fluctuations in phosphate and nitrate mainly due to variations in organic substrate availability. The microbial diversity was slightly higher in the AGS, with different dynamics in the microbiome over time. Seasonal periodicity was observed in both sludge types, with a larger shift in the CAS microbiome compared to the AGS. Groups important for reactor function, such as ammonia-oxidising bacteria (AOB), nitrite-oxidising bacteria (NOB), polyphosphate-accumulating organisms (PAOs) and glycogen-accumulating organisms (GAOs), followed similar trends in both systems, with higher relative abundances of PAOs and GAOs in the AGS. However, microbial composition and dynamics differed between the two systems at the genus level. For instance, among PAOs, Tetrasphaera was more prevalent in the AGS, while Dechloromonas was more common in the CAS. Among NOB, Ca. Nitrotoga had a higher relative abundance in the AGS, while Nitrospira was the main nitrifier in the CAS. Furthermore, network analysis revealed the clustering of the various genera within the guilds to modules with different temporal patterns, suggesting functional redundancy in both AGS and CAS. Key points • Microbial community succession in parallel full-scale aerobic granular sludge (AGS) and conventional activated sludge (CAS) processes. • Higher periodicity in microbial community structure in CAS compared to in AGS. • Similar functional groups between AGS and CAS but different composition and dynamics at genus level. Graphical abstract

show abstract

Removal of organic micropollutants from municipal wastewater by aerobic granular sludge and conventional activated sludge

Cited by 27 publications

References 92 publications

Removal of emerging micropollutants from nanofiltration retentate of municipal wastewater within biological fixed‐bed reactors under nitrifying and denitrifying conditions

Removal of emerging micropollutants from nanofiltration retentate of municipal wastewater within biological fixed‐bed reactors under nitrifying and denitrifying conditions

Organic Micropollutants in Wastewaters: Advances in Sustainable Management and Treatment Methods

Microbiome structure and function in parallel full-scale aerobic granular sludge and activated sludge processes

Contact Info

Product

Resources

About