Enhanced estrogen removal in activated sludge processes through the optimization of the hydraulic flow pattern

Coello-Garcia, T.; Curtis, Thomas P.; Mrozik, Wojciech; Davenport, Russell J.

doi:10.1016/j.watres.2019.114905

Cited by 15 publications

(3 citation statements)

References 29 publications

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“…The recoveries of PAHs ranged from 67 to 107% (RSD 0.8-11%) in effluent, and 67-101% (RSD 0.8-8.1%) in activated sludge (Supplementary Tables S2, S3). Recoveries of PBDEs and estrogens are reported elsewhere (Coello-Garcia et al, 2019;Komolafe et al, 2019). Method IDL, MDL and MQL have previously been reported (Komolafe et al, 2021).…”

Section: Quality Assurance and Data Analysismentioning

confidence: 99%

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Komolafe¹,

Mrozik

Dolfing

et al. 2021

Front. Environ. Sci.

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The removal mechanisms and extent of degradation of 28 chemicals (triclosan, fifteen polycyclic aromatic hydrocarbons, four estrogens, and eight polybrominated diphenyl ether congeners) in different biological treatment systems [activated sludge, up-flow anaerobic sludge blanket reactor (UASB) and waste stabilization pond (WSP)] was investigated to provide insights into the limits of engineered biological treatment systems. This was done through degradation experiments with inhibition and abiotic controls in static reactors under aerobic and anaaerobic conditions. Estrogens showed higher first order degradation rates (0.1129 h−1) under aerobic conditions with activated sludge inocula followed by low molecular weight (LMW) PAHs (0.0171 h−1), triclosan (0.0072 h−1), middle (MMW) (0.0054 h−1) and high molecular weight PAHs (HMW) (0.0033 h−1). The same trend was observed under aerobic conditions with a facultative inoculum from a WSP, although at a much slower rate. Biodegradation was the major removal mechanism for these chemicals in the activated sludge and WSP WWTPs surveyed. Photodegradation of these chemicals was also observed and varied across the group of chemicals (estrogens (light rate = 0.4296 d−1; dark = 0.3900 d−1) degraded faster under light conditions while reverse was the case for triclosan (light rate = 0.0566 d−1; dark = 0.1752 d−1). Additionally, all the chemicals were resistant to anaaerobic degradation with UASB sludge, which implies that their removal in the UASB of the surveyed WWTP was most likely via sorption onto solids. Importantly, the first order degradation rate determined in this study was used to estimate predicted effluent concentrations (PECs). The PECs showed good agreement with the measured effluent concentrations from a previous study for these treatment systems.

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Section: Quality Assurance and Data Analysismentioning

confidence: 99%

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Komolafe¹,

Mrozik

Dolfing

et al. 2021

Front. Environ. Sci.

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“…Trace organic contaminants, like α-ethinylestradiol (EE2) and β-estradiol (E2), as estrogen, have exert harmful effects for human health, even though they exposed at low concentrations (ng/L). Coello et al (2019) estimated that the hydraulic flow pattern in aeration tanks, which improved biological removal rates or HRT, had an efficient effect on estrogens removal. It concluded that slight modifications of an aeration tank improved its hydraulic behavior from 1 to the final tank-in-series, which substantially lower the minimum pseudo-first-order biotransformation constant (k bio ) required for EE2, emphasizing the significance of the hydraulic flow pattern to the biological degradation.…”

Section: Organic Pollutantsmentioning

confidence: 99%

Activated sludge and other aerobic suspended culture processes

Ouyang

et al. 2020

Water Environment Research

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This paper provides an overview of activated sludge related to suspended growth processes for the year 2019. The review encompasses process modeling of activated sludge, microbiology of activated sludge, process kinetics and mechanism, nitrogen and phosphorus control, design, and operation in the activated sludge field. The fate and effect of xenobiotics in activated sludge, including trace organic contaminant and heavy metal xenobiotics, which had influence on the growth of suspended sludge, are covered in this review. Compared to past reviews, many topics show increase in activity in 2019. These include, biokinetics process of aerobic granular sludge formation, pyrolysis kinetic mechanism of granular sludge. These topics are referred to formation and disintegration of granular sludge. Other sections include activated sludge settling model, toxicity resistant microbial community, nitritation-anammox processes for nitrogen removal, and respirometry used in the operation of real wastewater treatment plant are especially highlighted in this review.

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“…Therefore, EPs such as pharmaceuticals and endocrine disrupting compounds (EDCs) may go through the treatment system unchanged or are only partially removed, leading to their detection in WW-receiving water bodies and WWTP discharges in concentrations ranging from ng/L to mg/L [4][5][6][7][8]. EDCs may lead to the modification of the natural function of the endocrine system in wildlife by (i) blocking or copying the normal effect of hormones; (ii) affecting their synthesis or metabolism; and (iii) changing hormone receptor levels [8][9][10][11]. Among EDCs, estrogens such as 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) have often been indicated as particularly problematic compounds with high associated risks [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

Dias¹,

Sousa²,

Bernardo

et al. 2021

Molecules

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Presently, water quantity and quality problems persist both in developed and developing countries, and concerns have been raised about the presence of emerging pollutants (EPs) in water. The circular economy provides ways of achieving sustainable resource management that can be implemented in the water sector, such as the reuse of drinking water treatment sludges (WTSs). This study evaluated the potential of WTS containing a high concentration of activated carbon for the removal of two EPs: the steroid hormones 17β-estradiol (E2) and 17α-ethinylestradiol (EE2). To this end, WTSs from two Portuguese water treatment plants (WTPs) were characterised and tested for their hormone adsorbance potential. Both WTSs showed a promising adsorption potential for the two hormones studied due to their textural and chemical properties. For WTS1, the final concentration for both hormones was lower than the limit of quantification (LOQ). As for WTS2, the results for E2 removal were similar to WTS1, although for EE2, the removal efficiency was lower (around 50%). The overall results indicate that this method may lead to new ways of using this erstwhile residue as a possible adsorbent material for the removal of several EPs present in wastewaters or other matrixes, and as such contributing to the achievement of Sustainable Development Goals (SDG) targets.

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Enhanced estrogen removal in activated sludge processes through the optimization of the hydraulic flow pattern

Cited by 15 publications

References 29 publications

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Activated sludge and other aerobic suspended culture processes

Study of the Potential of Water Treatment Sludges in the Removal of Emerging Pollutants

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