A process diagnosis method for membrane water treatment plant using a constant flux membrane fouling model

Abstract Recently, membrane filtration systems have become increasingly common in drinking water treatment plants. In this industry, preventing membrane fouling is of utmost importance. Many studies on the relationship between raw water components and membrane fouling have been performed in laboratory conditions. However, very few studies have analyzed the components of foulants on the fouled membrane as operated in actual drinking water treatment plants. By analyzing these components in plant-conditions, membrane fouling will be more effectively prevented. In this study, we analyzed the components of foulants extracted with 0.1 N NaOH from a fouled membrane operated in a drinking water treatment plant in Japan. Our analysis revealed that the main foulants were humic substances. In order to dissolve the accumulated humic substances, additional chemical cleaning was attempted with 500 ppm sodium hypochlorite. As a result, it was found that humic substances were dissolved and filtration resistance significantly decreased. Additionally, the removal of inorganic foulants was also greater after chemical cleaning with 500 ppm sodium hypochlorite, as inorganic foulants trapped within humic substances were released to the membrane surface as hydroxides by the additional sodium hypochlorite cleaning and were dissolved by the periodic citric acid cleaning.

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Investigation of Membrane Fouling Materials in I Membrane Water Treatment Plant by Analyzing Discharge Liquid from CIP Processes and the Flux Test using the Mini-Modules

Journal of Korean Society of Environmental Engineers ◽

10.4491/ksee.2019.41.3.117 ◽

2019 ◽

Vol 41 (3) ◽

pp. 117-124

Author(s):

Kwangjin Byeon ◽

Yeobog Yun

Keyword(s):

Water Treatment ◽

Membrane Fouling ◽

Treatment Plant ◽

Water Treatment Plant ◽

Fouling Materials

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Assessment of water treatment processes: detailed organic matter characterisation and membrane fouling indices at the Loddon Water Treatment Plant, Victoria, Australia

Water Science & Technology Water Supply ◽

10.2166/ws.2011.040 ◽

2011 ◽

Vol 11 (3) ◽

pp. 274-280 ◽

Cited By ~ 1

Author(s):

C. Khorshed ◽

S. Vigneswaran ◽

J. Kandasamy ◽

R. Aryal ◽

D. Dharmapalan

Keyword(s):

Organic Matter ◽

Water Treatment ◽

Ion Exchange ◽

Membrane Fouling ◽

Treatment Plant ◽

Water Treatment Plant ◽

Treatment Methods ◽

Wide Range ◽

Exchange Adsorption ◽

Pre Treatment

Recent advances in membrane technology have led to its broad application, and reverse osmosis (RO) systems now represent the fastest growing segment of the desalination market. Its performance is hindered by membrane fouling. In this study pre-treatment methods to reduce RO fouling were investigated including flocculation, adsorption and ion exchange. Detailed organic characterisations were made in terms of florescence spectroscopy excitation emission matrix (EEM), UV254 absorbance and liquid chromatography-organic carbon detection (LCOCD). The different pre-treatment methods were assessed in terms of the fouling potential. This was quantified in terms of the modified fouling index measured using a dead-end cell micro-filtration (MF) unit. The existing pre-treatment of granular activated carbon (GAC) filter led to a good organic removal. Among the pre-treatment methods tested in the laboratory, purolite ion exchange/adsorption was found to be better than FeCl3 flocculation in terms of the amount as well as the wide range of organics removal. A pre-treatment of flocculation with Poly-ferric-silicate (PFSi) as flocculent gave a higher removal of organic matter compared to other pre-treatments tested. DOC was reduced from 11.5 to 4.25 mg/L, and it removed mostly the humic type substances.

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Influence of abnormal water intake linked to underwater aeration on ceramic membrane fouling in a drinking water treatment plant in Yeoncho, Korea

10.5004/dwt.2021.26961 ◽

2021 ◽

Vol 219 ◽

pp. 423-430

Author(s):

Jae-Ki Shin ◽

Kangmin Chon ◽

Hankyu Lee ◽

Jin Hwi Kim ◽

Yongeun Park

Keyword(s):

Drinking Water ◽

Water Treatment ◽

Water Intake ◽

Membrane Fouling ◽

Ceramic Membrane ◽

Treatment Plant ◽

Drinking Water Treatment ◽

Water Treatment Plant ◽

Drinking Water Treatment Plant

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Effects of a Novel Adsorbent on Membrane Fouling by Natural Organic Matter in Drinking Water Treatment

Membranes ◽

10.3390/membranes9110151 ◽

2019 ◽

Vol 9 (11) ◽

pp. 151 ◽

Cited By ~ 3

Author(s):

Lelum Manamperuma ◽

Eilen Vik ◽

Mark Benjamin ◽

Zhenxiao Cai ◽

Jostein Skjefstad

Keyword(s):

Organic Matter ◽

Water Treatment ◽

Natural Organic Matter ◽

Membrane Fouling ◽

Treatment Plant ◽

Drinking Water Treatment ◽

Water Treatment Plant ◽

Water Source ◽

Packed Bed ◽

Transmembrane Pressure

Irreversible fouling of water filtration membranes reduces filter longevity and results in higher costs associated with membrane maintenance and premature replacement. The search for effective pretreatment methods to remove foulants that tend to irreversibly foul membranes is ongoing. In this study, a novel adsorbent (Heated Aluminum Oxide Particles (HAOPs)) was deployed in a fully automated pilot system to remove natural organic matter (NOM) from the surface water source used at the UniVann water treatment plant (WTP) in Ullensaker County, Norway. The pilot plant treatment process consists of passing the water through a thin layer of HAOPs that has been deposited on a mesh support. The HAOPs layer acts as an active packed bed which removes NOM from the water. Fluxes around 120 L/m2/h (LMH) at transmembrane pressure (TMP) below 10.7 psi (0.7 bar) were achieved over production cycles excessing 12 h. Treatment achieved always >85% colour removal and effluent colour <5 mg Pt/L (the target of treatment), and always <0.01 NTU turbidity and non-detectable suspended solids in the permeate. The HAOPs mixture after saturated with NOM is easy to remove by disruption of the HAOPs by rinsing the mesh surface, and the sludge is easily dewatered to higher of dry solids content.

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