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2023 | OriginalPaper | Buchkapitel

3. Pretreatments Before the Nanofiltration Technique

verfasst von : Sevde Korkut, Vahid Vatanpour, Ismail Koyuncu

Erschienen in: Nanofiltration Membrane for Water Purification

Verlag: Springer Nature Singapore

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Abstract

Nanofiltration (NF) is a preferred process in water and wastewater purification, water recovery, and reuse due to its ability to retain low molecular weight components. However, there is an important factor limiting nanofiltration applications, which is the formation of fouling caused by various pollutants. Pretreating wastewater before entering into the NF process is the most feasible technique to prevent fouling. The pretreatment is aimed to keep the undesirable compounds in the feed water, decrease the concentration of these compounds in the boundary layer, prevent the gel formation/concentration polarization, and/or provide a long membrane service span. At this point, it is critical to select the most appropriate pretreatment methods or configurations based on the characteristics of the wastewater. Pretreatment technologies for NF can be broadly subdivided into chemical (coagulation/flocculation/sedimentation and advanced oxidation), physical (sand/carbon/cartridge filter), biological (MBR/PAC, biosorption), and membrane-based processes (UF/MF). In this section, the combinations of NF-pretreatment technologies studied in various wastewaters are evaluated in terms of factors such as improvement in flux, process sustainability, the water quality of the effluent, and cost.

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Literatur
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Metadaten
Titel
Pretreatments Before the Nanofiltration Technique
verfasst von
Sevde Korkut
Vahid Vatanpour
Ismail Koyuncu
Copyright-Jahr
2023
Verlag
Springer Nature Singapore
DOI
https://doi.org/10.1007/978-981-19-5315-6_3