How to dose powdered activated carbon in deep bed filtration for efficient micropollutant removal

Altmann, Johannes; Ruhl, Aki Sebastian; Sauter, Daniel; Pohl, J.; Jekel, Martin

doi:10.1016/j.watres.2015.03.031

Cited by 26 publications

(16 citation statements)

References 17 publications

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“…Whereas, as the filtration progressed, a steady decrease in the relative OMP concentration was observed, which emphasizes the importance of the retained PAC for OMP removal: the more PAC was accumulated, the better OMPs were adsorbed. However, the observed OMP removal trend deviates from what was found by (Altmann et al, 2015), where OMP removal stabilized after certain period of filtration (i.e. 4 h).…”

Section: Omp Removal In the Filter With Continuous Pac Dosingcontrasting

confidence: 86%

“…OMP breakthrough under continuous PAC dosing is given in Figure 5. This adsorption process consists of a primary adsorption onto the freshly dosed PAC in the filter supernatant, and an additional adsorption onto the retained PAC in the filter bed (Altmann et al, 2014;Altmann et al, 2015). In this study, however, only 7 min contact time was available during PAC transport in the filter supernatant, explaining the low OMP removal (less than 25% except for metoprolol) in the initial filtration stage.…”

Section: Omp Removal In the Filter With Continuous Pac Dosingmentioning

confidence: 78%

“…Given a complex EfOM background in the secondary effluent, the OMP removal was inevitably subjected to an adsorption competition effect, which explains the 9 times less specific throughput for 20% breakthrough of SMX than the reported values in the study of Altmann et al(2015), in which tap water was used as a background. However, a similar increase rate (i.e.…”

Section: Pac Distribution In Pre-embedded Filter and The Influence Onmentioning

confidence: 97%

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Integrating powdered activated carbon into wastewater tertiary filter for micro-pollutant removal

Aarts

Shang

et al. 2016

Journal of Environmental Management

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Integrating powdered activated carbon (PAC) into wastewater tertiary treatment is a promising technology to reduce organic micro-pollutant (OMP) discharge into the receiving waters. To take advantage of the existing tertiary filter, PAC was pre-embedded inside the filter bed acting as a fixed-bed adsorber. The pre-embedding (i.e. immobilization) of PAC was realized by direct dosing a PAC solution on the filter top, which was then promoted to penetrate into the filter media by a down-flow of tap water. In order to examine the effectiveness of this PAC pre-embedded filter towards OMP removal, batch adsorption tests, representing PAC contact reactor (with the same PAC mass-to-treated water volume ratio as in the PAC pre-embedded filter) were performed as references. Moreover, as a conventional dosing option, PAC was dosed continuously with the filter influent (i.e. the wastewater secondary effluent with the investigated OMPs). Comparative results confirmed a higher OMP removal efficiency associated with the PAC pre-embedded filter, as compared to the batch system with a practical PAC residence time. Furthermore, over a filtration period of 10 h (approximating a realistic filtration cycle for tertiary filters), the continuous dosing approach resulted in less OMP removal. Therefore, it was concluded that the pre-embedding approach can be preferentially considered when integrating PAC into the wastewater tertiary treatment for OMP elimination.

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Section: Omp Removal In the Filter With Continuous Pac Dosingcontrasting

confidence: 86%

Section: Omp Removal In the Filter With Continuous Pac Dosingmentioning

confidence: 78%

Section: Pac Distribution In Pre-embedded Filter and The Influence Onmentioning

confidence: 97%

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Integrating powdered activated carbon into wastewater tertiary filter for micro-pollutant removal

Aarts

Shang

et al. 2016

Journal of Environmental Management

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“…Due to insufficient contact time in the filter supernatant, the PAC adsorption capacity is typically not exhausted before separation, as has been investigated in detail elsewhere (Altmann et al, 2015). Fig.…”

Section: Micropollutantsmentioning

confidence: 99%

“…In this process combination, the adsorption of OMPs occurs primarily in the filter supernatant. Because the adsorption capacity of the PAC is typically not exhausted before separation, further adsorption onto embedded PAC may increase the PAC efficiency (Altmann et al, 2015). In combination with coagulation, this process scheme is suitable to simultaneously reduce phosphorus and OMP concentrations.…”

Section: Introductionmentioning

confidence: 99%

Integrating organic micropollutant removal into tertiary filtration: Combining PAC adsorption with advanced phosphorus removal

2015

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A low pressure SWCNT‐ENM sandwich membrane system for the removal of PPCPs from water

Soberman

Tabe

2020

Can J Chem Eng

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How to dose powdered activated carbon in deep bed filtration for efficient micropollutant removal

Cited by 26 publications

References 17 publications

Integrating powdered activated carbon into wastewater tertiary filter for micro-pollutant removal

Integrating powdered activated carbon into wastewater tertiary filter for micro-pollutant removal

Integrating organic micropollutant removal into tertiary filtration: Combining PAC adsorption with advanced phosphorus removal

A low pressure SWCNT‐ENM sandwich membrane system for the removal of PPCPs from water

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