Simultaneous powdered activated carbon dosage for micropollutant removal on a municipal wastewater treatment plant compared to the efficiency of a post treatment stage

Evers, Mareike; Lange, Ruben-Laurids; Heinz, Eva; Wichern, Marc

doi:10.1016/j.jwpe.2022.102755

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…Less hydrophobic properties (log K OW < 3) and chemically stable pollutant structure are cause of persistency (Fernandez‐Fontaina et al, 2016; Nakada et al, 2006). With PAC adsorption, reduction ratios of 50–86% can be achieved (Evers et al, 2022; Gidstedt et al, 2022), whereas ozone treatment is more promising with > 90 to 100% elimination (Abegglen et al, 2012; Altmann et al, 2014). As for DIC, an additional ozone step could be feasible for CMP (as shown in Section 1.2), as CMP metabolites with hydroxyl or carbonyl groups were shown to be biologically mineralized (Keen et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Considering the production of H 2 O 2 or ozone at the recovery facilities, their safety risks, and energy demands (Abegglen et al, 2012;Sturm et al, 2022), the biological elimination in fixed-bed reactors has the advantages of lower energy and space demand as well as lower safety hazards for employees. Based on log K OW, sorption should not be relevant for MET (Rogers, 1996), though it was proven to be reduced by adsorption on PAC with ranges of 62-95% in several studies in dependency of used dosage, waste water quality, and DOC levels (Abegglen et al, 2012;Evers et al, 2022;Gidstedt et al, 2022;Margot, 2015). Adsorption of > 99% was observed on GAC by Sturm et al (2022).…”

Section: Overall Elimination Per Experimental Phasementioning

confidence: 99%

“…A similar effect was seen in this study, where a reduction to below 1.8 μg/L was not possible, leading to the assumption that an increased initial concentration, as shown in this study, is needed for an increase of biodegradability of DIC. With a log K OW of 4, DIC is more likely adsorbed, although elimination ratios with PAC adsorption are only slightly higher with 45% to above 81% depending on dosage (Abegglen et al, 2012;Evers et al, 2022;Gidstedt et al, 2022;Margot, 2015). For GAC, 93% were achieved by Sturm et al (2022).…”

Section: Overall Elimination Per Experimental Phasementioning

confidence: 99%

“…In phase 3, a positive elimination was observed, see discussion in Section 3.4. An SMX reduction by PAC or GAC adsorption is also fluctuating with 3-89% (Evers et al, 2022;Gidstedt et al, 2022;Sturm et al, 2022), whereas ozone led to > 86 to 93% (Abegglen et al, 2012;Altmann et al, 2014;Margot, 2015). For SMX, an additional ozonation unit could be feasible (see Section 1.2) depending on biotransformation potential of SMX byproducts.…”

Section: Micropollutantmentioning

confidence: 99%

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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

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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.

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Section: Resultsmentioning

confidence: 99%

Section: Overall Elimination Per Experimental Phasementioning

confidence: 99%

Section: Overall Elimination Per Experimental Phasementioning

confidence: 99%

Section: Micropollutantmentioning

confidence: 99%

See 2 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

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“…Conventional wastewater treatment processes are not sufficiently eliminated heavy metals including Cr [ 18 ]. But, advanced water treatment technologies such as membrane separation processes, advanced oxidation processes, ozonation, adsorption, and membrane bioreactors achieved high Cr removal [ 6 , 19 – 21 ].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of chromium from electroplating wastewater using activated carbon developed from water hyacinth

Worku,

Tibebu,

Nure

et al. 2023

BMC Chemistry

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Industrial wastewater polluted with high concentrations of Cr is commonly discharged into water resources without proper treatment. This gives rise to the deterioration of water quality and imposes adverse effects on public health. Therefore, this study is aimed at removing Cr from electroplating wastewater using activated carbon produced from water hyacinth under a full factorial experimental design with three factors and three levels (pH,2,5 and 8, adsorbent dose 0.5,1and1.5 in 100 mL and contact time 30, 60 and120 min). A phosphoric acid solution of 37% was used to activate the carbon, which was then subjected to thermal decomposition for 15 min at 500 °C. The activated carbon was characterized by the presence of a high surface area (203.83 m2/g) of BET, cracking of adsorbent beads of SEM morphology, amorphous nature of XRD, and many functional groups of FTIR such as hydroxyl (3283 cm−1), alkane (2920 cm−1), nitrile (2114 cm−1) and aromatics (1613 cm−1). The minimum Cr adsorption performance of 15.6% was obtained whereas maximum removal of 90.4% was recorded at the experimental condition of pH 2, adsorbent dose of 1.5 g/100 mL, and contact time of 120 min at a fixed value of initial Cr concentration of 100 mg/L. Similarly, the maximum Cr removal from real electroplating wastewater was 81.2% at this optimum point. Langmuir's model best described the experimental value at R2 0.96 which implies the adsorption is chemically bonded, homogeneous, and monolayer. Pseudo-second-order model best fits with the experimental data with R2 value of 0.99. The adsorbent was regenerated for seven cycles and the removal efficiency decreased from 93.25% to 21.35%. Finally, this technology is promising to be scaled up to an industrial level.

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The challenges of micropollutants and their environmental detection through biochar-based nanostructured electrochemical sensors: a review

Ambaye

Fito

Nxumalo

et al. 2023

Int. J. Environ. Sci. Technol.

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Simultaneous powdered activated carbon dosage for micropollutant removal on a municipal wastewater treatment plant compared to the efficiency of a post treatment stage

Cited by 11 publications

References 30 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

Adsorption of chromium from electroplating wastewater using activated carbon developed from water hyacinth

The challenges of micropollutants and their environmental detection through biochar-based nanostructured electrochemical sensors: a review

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