Removal Characteristics of &lt;em&gt;N&lt;/em&gt;-Nitrosamines and Their Precursorsby Pilot-Scale Integrated Membrane Systems for Water Reuse

Takeuchi, Haruka; Yamashita, Naoyuki; Nakada, Norihide; Tanaka, Hiroaki

doi:10.20944/preprints201807.0460.v1

2018

DOI: 10.20944/preprints201807.0460.v1

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Removal Characteristics of <em>N</em>-Nitrosamines and Their Precursorsby Pilot-Scale Integrated Membrane Systems for Water Reuse

Haruka Takeuchi¹,

Naoyuki Yamashita²,

Norihide Nakada³

et al.

Abstract: This study investigated the removal characteristics of N-nitrosamines and their precursors at three pilot-scale water reclamation plants. These plants applies different integrated membrane systems: (1) microfiltration (MF) / nanofiltration (NF) / RO; (2) sand filtration/three-step RO;and (3)

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2021

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Cited by 1 publication

References 27 publications

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Removal of Trace Organic Contaminants by Parallel Operation of Reverse Osmosis and Granular Activated Carbon for Drinking Water Treatment

Konradt¹,

Kuhlen²,

Rohns³

et al. 2021

Membranes

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In response to increasingly stringent restrictions for drinking water quality, a parallel operation of two common technologies, low-pressure reverse osmosis (LPRO) and activated carbon filtration (ACF), was investigated in a comprehensive five-month pilot study for the removal of 32 typical trace organic contaminants (TrOCs) from Rhine bank filtrates employing a semi- technical plant. TrOCs have been divided into three groups: polyfluorinated aliphatic compounds; pharmaceuticals, pesticides and metabolites; in addition to volatiles, nitrosamines and aminopolycarboxylic acids, which were also examined. The net pressure behavior, normalized salt passage and rejection of TrOCs by LPRO were investigated and compared with ACF operation. In addition, autopsies from the leading and last membrane modules were performed using adenosine triphosphate (ATP), total organic carbon (TOC), ICP-OES and SEM-EDX techniques. Generally, rather stable LPRO membrane performance with limited membrane fouling was observed. TrOCs with a molecular weight of ≥ 150 Da were completely retained by LPRO, while the rejection of di- and trichloro compounds improved as the filtration progressed. ACF also showed significant removal for most of the TrOCs, but without desalination. Accordingly, the ACF and LPRO can be operated in parallel such that the LPRO permeate and the ACF-treated bypass can be mixed to produce drinking water with adjustable hardness and significantly reduced TrOCs.

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Removal of Trace Organic Contaminants by Parallel Operation of Reverse Osmosis and Granular Activated Carbon for Drinking Water Treatment

Konradt¹,

Kuhlen²,

Rohns³

et al. 2021

Membranes

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show abstract

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Removal Characteristics of <em>N</em>-Nitrosamines and Their Precursorsby Pilot-Scale Integrated Membrane Systems for Water Reuse

Cited by 1 publication

References 27 publications

Removal of Trace Organic Contaminants by Parallel Operation of Reverse Osmosis and Granular Activated Carbon for Drinking Water Treatment

Removal of Trace Organic Contaminants by Parallel Operation of Reverse Osmosis and Granular Activated Carbon for Drinking Water Treatment

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