Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals

Sauter, Daniel; Dąbrowska, A.; Bloch, Robert J.; Stapf, Michael; Miehe, Ulf; Sperlich, Alexander; Gnirß, Regina; Wintgens, Thomas

doi:10.1039/d0ew00684j

Cited by 20 publications

(29 citation statements)

References 53 publications

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“…In ozonation, the PPCPs’ removal rates depend on the ozone kinetic rate constant (kO 3 ) and the OH• kinetic rate constant (k OH•) [ 34 , 69 ]. The ozonation increases with kO 3 and k• OH based on the results of a pilot plant treatment study of secondary effluent (0.7 mg O 3 /mg DOC) [ 33 ].…”

Section: Ppcp Removal Methodsmentioning

confidence: 99%

“…While ozonation can deactivate microorganisms, NOM and PPCPs, oxidation by-products can form. Some PPCPs are slowly oxidised and cannot be practically removed [ 34 , 69 ]. At the ozone doses used in conventional wastewater treatment, NOM and PPCPs compete for oxidants, leaving a portion of the latter unoxidised [ 70 ].…”

Section: Ppcp Removal Methodsmentioning

confidence: 99%

“…For these reasons, a post-treatment of adsorption is added after ozonation to treat the remaining NOM, PPCPs and their by-products. Many investigations have used AC for this purpose [ 34 , 83 , 84 , 85 ].…”

Section: Ppcp Removal Methodsmentioning

confidence: 99%

“…Many reviews have discussed a variety of processes for removing PPCPs from the environment, especially water. These processes include adsorption [ 3 , 29 , 30 , 31 ], ozone-based processes [ 32 , 33 ], ozonation [ 16 , 34 ], membrane filtration [ 35 , 36 ], Fenton oxidation [ 16 , 37 ], UV oxidation [ 16 ] and biological processes [ 16 , 38 ]. However, these processes were not integrated into most studies to take advantage of the different mechanisms specific to each process and to be synergistic enough in the removal of the PPCPs.…”

Section: Introductionmentioning

confidence: 99%

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Treatment Trends and Combined Methods in Removing Pharmaceuticals and Personal Care Products from Wastewater—A Review

et al. 2023

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When discharged into wastewater, pharmaceuticals and personal care products (PPCPs) become microorganic contaminants and are among the largest groups of emerging pollutants. Human, animal, and aquatic organisms’ exposures to PPCPs have linked them to an array of carcinogenic, mutagenic, and reproductive toxicity risks. For this reason, various methods are being implemented to remove them from water bodies. This report critically reviews these methods and suggests improvements to removal strategies. Biological, physical, and chemical methods such as biological degradation, adsorption, membrane filtration, and advanced electrical and chemical oxidation are the common methods used. However, these processes were not integrated into most studies to take advantage of the different mechanisms specific to each process and are synergistic in the removal of the PPCPs that differ in their physical and chemical characteristics (charge, molecular weight, hydrophobicity, hydrogen bonding, structure). In the review articles published to date, very little information is available on the use of such integrated methods for removing PPCPs. This report attempts to fill this gap with our knowledge.

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Section: Ppcp Removal Methodsmentioning

confidence: 99%

Section: Ppcp Removal Methodsmentioning

confidence: 99%

Section: Ppcp Removal Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Treatment Trends and Combined Methods in Removing Pharmaceuticals and Personal Care Products from Wastewater—A Review

et al. 2023

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“…Nevertheless, a number of studies recommend to implement a post treatment (for example biological sand filtration) after ozonation because of the worry for formation of OTPs that are more toxic than the parent compounds [45,190]. There are studies that find adverse effects on fish development of ozonated WWTP effluents [234] and even a decrease or increase in adverse effects on a single endpoint (genotoxicity) depending on the specific assay (UmuC or Ames) that was used [73].…”

Section: Post Treatment After Ozonationmentioning

confidence: 99%

The BO3 process for removal of micropollutants from wastewater treatment plant effluent : exploring the synergies between biological treatment and ozonation

Gijn¹

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Wastewater treatment plant effluent is an i mportant point source for micropollutants emissions into the environment. These micropollutants can pose risks for ecosystems and humans; therefore, wastewater treatment plants should be upgraded to improve their micropollutant removal. Micropollutant removal can be improved by implementing tertiary treatment such as ozonation or activated carbon filtration. However, organic matter in the wastewater treatment plant effluent interferes with the micropollutant removal in these tertiary treatments, resulting in high energy demand and costs. To decrease the energy demand of tertiary treatment, biological pre-treatment can be introduced to remove effluent organic matter in an energy efficient manner. This biological pre-treatment was optimized by comparing three types of bioreactors; biological activated carbon, sand filter, and moving bed bioreactor. The reactors were operated at five flow rates (0.25, 0.5, 1, 2 and 4 L/h) in a continuous setup. The biological activated carbon filter achieved higher effluent organic matter removal than the sand filter and moving bed bioreactor (up to 72, 41, and 21% respectively). Additionally, effluent organic matter removal was negatively correlated to the flow rate in the biological activated carbon filter and the sand filter. The biological activated carbon filter also achieved average removal of 85% for the 18 analyzed micropollutants, although how long this high micropollutant removal can be sustained is unclear. To conclude, the biological activated carbon filter as pre-treatment can achieve high effluent organic matter removal, which would decreases the energy demand and cost of subsequent treatment for micropollutant removal.

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Removal of Organic Micropollutants from Urban Wastewater

Schaar,

Kreuzinger,

Kohlgrüber

et al. 2023

Handbook of Water and Used Water Purification

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Deep-bed filters as post-treatment for ozonation in tertiary municipal wastewater treatment: impact of design and operation on treatment goals

Abstract: The removal of organic contaminants during post-treatment with deep-bed filters after ozonation in tertiary municipal wastewater treatment can be optimised by the choice of filter material and contact time.

Cited by 20 publications

References 53 publications

Treatment Trends and Combined Methods in Removing Pharmaceuticals and Personal Care Products from Wastewater—A Review

Treatment Trends and Combined Methods in Removing Pharmaceuticals and Personal Care Products from Wastewater—A Review

The BO3 process for removal of micropollutants from wastewater treatment plant effluent : exploring the synergies between biological treatment and ozonation

Removal of Organic Micropollutants from Urban Wastewater

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