Advanced water treatment system using ozone and ozone resistant microfiltration module

Hashino, Masatoshi; Mori, Yoshihiko; Fujii, Yasujiro; Nakatani, K.; Hori, Hisae; Takahashi, Kazutaka; Motoyama, Nobuyuki; Mizuno, Kouhei; Minegishi, T.

doi:10.2166/ws.2001.0111

Cited by 5 publications

(5 citation statements)

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“…Fouling Reduction. Preoxidation has been found to be effective in reducing organic fouling of LPMs; ozone seems to be a promising preoxidant for this purpose as found in several studies (76,78,79). A recent pilot-scale study also showed that a combination of 0.5 mg/L of permanganate and 1 mg/L of chlorine significantly reduced the fouling of a UF membrane in an integrated coagulation-UF system during the treatment of a reservoir water impaired by algae (80).…”

Section: Preoxidationmentioning

confidence: 91%

Pretreatment for Low Pressure Membranes in Water Treatment: A Review

Huang

Schwab

Jacangelo

2009

Environ. Sci. Technol.

518

210

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The application of low pressure membranes (LPMs) to drinking water treatment and wastewater reuse has undergone accelerated development in the past decade. Integration of pretreatment with LPM filtration has been widely employed at full scale to reduce membrane fouling and/or increase the removal of certain aquatic contaminants. In principle, pretreatment of source water can impact membrane filtration in three ways: altering contaminant size distributions, changing mutual affinities of contaminants or their affinities to membrane surfaces, and suppressing undesirable microbial growth or removing biodegradable contaminants. The literature shows that, compared to the well-demonstrated enhancement of contaminant removal, impact of pretreatment to membrane fouling is often small or even negative, which isfurther complicated by variations in source water quality and membrane properties. Coagulation has been the most successful pretreatment for fouling reduction. Novel technologies are in immediate need for fouling control; ones which rely on a better understanding of the mechanisms of pretreatment and LPM filtration are warranted. This article provides a critical review of the state-of-the-art of pretreatment for LPMs, and discusses potential areas for future technical development and scientific studies.

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Section: Preoxidationmentioning

confidence: 91%

Pretreatment for Low Pressure Membranes in Water Treatment: A Review

Huang

Schwab

Jacangelo

2009

Environ. Sci. Technol.

518

210

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“…(2016) [1][2][3][4][5][6][7][8] www.deswater.com doi: 10.1080/19443994.2016.1180266 Bench-scale work has shown that preozonation can remove dissolved organic foulants such as humic substances that are known to cause chemically irreversible membrane fouling [6][7][8]. However, since most of this work has considered preozonation application directly ahead of the membrane process, work has been limited to ozone-tolerant ceramic membranes [9][10][11][12].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Hashino et al [3] tested an ozone-resistant polyvinylidene fluoride microfiltration membrane for treatment of surface water. In their pilotscale work, ozone was applied directly ahead of the membrane process so that a residual of 0.3 mg L −1 O 3 was detectable immediately upstream of the membrane surface.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Pretreatment strategies to mitigate fouling and achieve enhanced removal can include both conventional treatment (coagulation, flocculation, and sedimentation, or CFS), and preoxidation with ozone (preozonation). Preozonation, when applied under the appropriate conditions, has been shown to reduce downstream membrane fouling [1][2][3], and independently, act as a coagulant aid during conventional treatment [4,5]. However, few studies have investigated the use preozonation with pilotscale membranes and less work has been published on the integration of both preozonation and CFS pretreatment prior to ultrafiltration.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafiltration fouling reduction with the pilot-scale application of ozone preceding coagulation, flocculation, and sedimentation for surface water treatment

Biscardi

Duranceau

2016

Desalination and Water Treatment

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A B S T R A C TAn ultrafiltration (UF) membrane process integrating ozone oxidation prior to a coagulation, flocculation, and sedimentation (CFS) pretreatment configuration processing surface water has been evaluated at the pilot-scale. Unlike prior research limited to short-term bench-scale evaluations, this current study provides information regarding the application of ozone oxidation prior to a CFS-UF pilot process operating over a four-month period (2,800 pilot runtime hours). In this work, changes in the long-term fouling behavior of the UF membrane process in response to the application of ozone prior to CFS pretreatment were characterized using fouling indices. When an average of 2.5 mg L −1 of ozone was applied prior to coagulation requiring 27 mg L −1 of polyaluminum chloride and a UF operating water flux of 85 L h −1 m −2 , the chemically reversible and hydraulically irreversible fouling indices increased by 59 and 40%, respectively. A reduction of chemically irreversible fouling concomitant with a continuous improvement of normalized specific flux was observed over 1,240 pilot runtime hours of ozone application. The total fouling index decreased by 41% as compared to the baseline CFS-UF configuration. This research indicates that the use of ozone oxidation prior to a CFS-UF configuration can reduce membrane fouling when integrated with conventional surface water treatment.

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“…The results indicated that biological treatment goals could be satisfied to a large degree while simultaneously meeting other drinking water treatment objectives such as disinfection and particle removal. In order to achieve an efficient and economical advanced drinking water system, the relationship between operating conditions, membrane filtration flux and water qualities was examined by using a pilot plant consisting of ozonation facility, microfiltration (MF) module and granular activated carbon (GAC) tower (Hashino et al, 2001). It was found that keeping residual ozone of more than 0.3 mg/L on the membrane surface was necessary to obtain a high membrane filtration flux.…”

Section: Disinfection Methodsmentioning

confidence: 99%