Reverse osmosis fouling during pilot-scale municipal water reuse: Evidence for aluminum coagulant carryover

Sari, Mutiara Ayu; Chellam, Shankararaman

doi:10.1016/j.memsci.2016.07.029

Cited by 35 publications

(19 citation statements)

References 31 publications

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“…If the filtration does not perform well, the mass of retentate is smaller than the mass of membrane itself, and the decrease of R CO is slight. The lower the R CO is, the bigger the quantity of intercepted pollutants gets, and the better the ultrafiltration performs . Table shows the C:O ratio ( R CO ): the value for membrane exposed to SE was 1.85, and that of coagulation‐pretreated water was 1.83, which were similar to that of the virgin membrane (1.87).…”

Section: Resultsmentioning

confidence: 99%

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Hou

2018

J of Chemical Tech & Biotech

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BACKGROUND: Ultrafiltration (UF) technology is efficient in treating wastewater. However, membrane fouling during filtration process affects the performance of UF to a large extent. Pretreatment prior to UF is important for enhancing membrane performance, reducing membrane fouling and extending the membrane lifetime. RESULTS:In this study, two pretreatment technologies, including coagulation and Fenton, were applied individually before UF for treating secondary effluent (SE) from recycled paper mill. Results exhibited that direct membrane filtration got the highest flux loss and worst membrane fouling compared with performances of those conducting pretreatments. Compared to coagulation + UF, Fenton + UF had superior performance in reducing dissolved organics with a COD rejection of 91.81%, and mitigating membrane fouling with a stable flux of 133 J m −2 h −1 . GPC results further showed that Fenton pretreatment degraded macromolecules into smaller organic compounds. In addition, the classical blocking filtration laws were employed to scrutinize the fouling alleviation mechanism of pretreatments. CONCLUSION: Pretreatments prolonged the transition from pore blocking to cake filtration, thereby reducing fouling. Among them, Fenton was a promising pretreatment method prior to UF for treating recycled paper SE.

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Section: Resultsmentioning

confidence: 99%

Reducing ultrafiltration membrane fouling during recycled paper mill wastewater treatment using pretreatment technologies: a comparison between coagulation and Fenton

Hou

2018

J of Chemical Tech & Biotech

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“…It has the same problem for using permeate flux decline as a method to assess membrane cleaning efficiency (Nam et al, 2014). Another example is sacrificing the RO module and performing autopsy to identify RO foulants (Sari and Chellam, 2016). Similarly, it cannot detect RO membrane fouling in the early stage.…”

Section: Membrane Monitoringmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

753

362

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Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

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“…The study indicated that these particles increased water flux through the membrane by 44% comparing with the control one, while NaCl rejection maintained the same, >99%. Sari and Chellam (2016) were the best. According to Slocum et al (2016), reverse osmosis pumping system should be located at high elevation to lower the pumping energy.…”

Section: Membrane Filtrationmentioning

confidence: 97%