Membrane Bioreactors for RO Pretreatment

Dukes, Simon; Gottberg, Antonia von

doi:10.2175/193864706783775586

Cited by 8 publications

(5 citation statements)

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“…MBR was reported to produce an effluent of much superior quality containing <1 mg/L suspended solids in contrast to 12 mg/L obtained from AS. Dukes and Gottberg [278] reported successful control over calcium phosphate scaling in RO systems through the use of MBRs by decreasing phosphate concentrations (0.1 ppm) obtained in the effluent. In addition, the filtration mechanism within the MBR can be an important factor in determining the permeate quality obtained from RO systems.…”

Section: New Emerging Trendsmentioning

confidence: 99%

“…Lerner et al [277] MBRs; much superior effluent was produced compared to activated sludge. Dukes and Gottberg [278] MBRs; reduced phosphate concentrations were obtained leading to successful control over calcium phosphate scaling in RO systems. Gorey et al [281] Microbial sensing membranes; hydrophilic membranes which expand at low temperatures and collapse at higher temperatures.…”

Section: Reference Pretreatment Technique / Novel Membranesmentioning

confidence: 99%

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Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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Recent progress in reverse osmosis (RO) technology is not limited to RO membrane materials, module designs and RO process optimization. It involves prior feed treatment which directly impacts RO system performance. The ongoing challenges of membrane fouling in RO membranes can be addressed by increasing the operational efficiency through the use of correct pretreatment options which can mitigate organic and inorganic fouling by selectively rejecting contaminants prior to reaching the RO unit. Highly polluted water resources have put critical stress on the existing conventional pretreatment techniques, whereby membrane pretreatment has emerged as a promising alternative. This paper provides an overview of the development and current trends in conventional and nonconventional RO pretreatment techniques whereby the techniques are critically reviewed to 2 inform readers of potential improvements in such areas. This paper addresses the major drawbacks of conventional pretreatment methods which have necessitated the use of membrane pretreatment techniques. Special attention is given to microfiltration, ultrafiltration and nanofiltration methods and their development in terms of advanced membrane materials based on ceramics and self-cleaning membranes. Studies from laboratory scale standalone systems, pilot scale and large scale integrated systems for performance, cost and ecological analysis have been reviewed to familiarize readers with the many factors which need to be analyzed for selection of the appropriate pretreatment method(s). The critical review in this paper will help researchers focus more on the areas which have room for further development for cost-effective and advanced RO pretreatment techniques.

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Section: New Emerging Trendsmentioning

confidence: 99%

Section: Reference Pretreatment Technique / Novel Membranesmentioning

confidence: 99%

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

2019

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“…7 Yet, MBRs can be coupled with a downstream reverse osmosis (RO) and advanced oxidation processes to comply with more stringent water quality regulations. [8][9][10][11][12][13] Another major problem associated with the operation of MF or UF MBRs is membrane fouling. Membrane fouling occurs on the MBR membranes and may occur on downstream RO membranes.…”

Section: Water Impactmentioning

confidence: 99%

“…7 Yet, MBRs can be coupled with a downstream reverse osmosis (RO) and advanced oxidation processes to comply with more stringent water quality regulations. 8–13…”

Section: Introductionmentioning

confidence: 99%

The osmotic membrane bioreactor: a critical review

Holloway

Achilli

Cath

2015

Environ. Sci.: Water Res. Technol.

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“…However, fouling by organic substances and biological growth remain as significant problems in reverse osmosis applications, resulting in higher process costs (Chen et al, 2002;del Pino and Durham, 1999;Lopez-Ramirez et al, 2006). Research has shown that the key to reducing reverse osmosis fouling within water reclamation lies in effective pretreatment, and it has been widely accepted that lowpressure membranes are very effective at providing such treatment (Adham et al, 2001;Bartels et al, 2005;Dukes and von Gottberg, 2006;Durham et al, 2001;Wintgens et al, 2005). A survey published in 2007 showed that, of the plants using reverse osmosis for reclamation applications, 79% used membrane pretreatment to protect the reverse osmosis system (Burbano et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Addressing Reverse Osmosis Fouling within Water Reclamation—A Side‐By‐Side Comparison of Low‐Pressure Membrane Pretreatments

Kent

Farahbakhsh

2011

Water Environment Research

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A tertiary membrane filtration (TMF) pilot operating on secondary effluent and a membrane bioreactor (MBR) were setup in a side-by-side study as pretreatment.s for two identical reverse osmosis pilot systems. The water quality of the permeate from both low-pre.ssure membrane pretreatment systems and the fouling rate of the reverse osmosis systems were eompared to assess the capabilities of the two lowpressure membrane pretreatments to prevent organic fouling of the reverse osmosis systems. Both pretreatment pilots were setup using typical operating conditions (i.e., solids retention time and mixed-liquor suspended solids). A consistent difference in water quality and reverse osmosis performance was demonstrated during the 12-month study. The MBR permeate consistently had significantly lower total organic carbon (TOC) and chemical oxygen demand concentrations, but higher color and specific UV absorbance compared with the permeate from the TMF pretreatment. The pretreatment with the MBR gave an average reverse osmosis fouling rate over the entire study (0.27 Lmh/bar-month) that was less than half of the value found for the reverse osmosis with TMF pretreatment (0.60 Lmh/bar-month). A correlation of reverse osmosis feed TOC concentration with average reverse osmosis fouling rate also was established, independent of the pretreatment method used. Results from a cleaning analysis, energy dispersive spectroscopy, and fourier transformed infrared reflectometry confirmed that the foulants were primarily organic in nature. It is concluded that, for this type of application and setup, MBR systems present an advantage over tertiary membrane polishing of secondary effluent for reverse osmosis pretreatment. Water Environ. Res.. 83,515 (2011).

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Membrane Bioreactors for RO Pretreatment

Cited by 8 publications

References 0 publications

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

Reverse osmosis pretreatment technologies and future trends: A comprehensive review

The osmotic membrane bioreactor: a critical review

Addressing Reverse Osmosis Fouling within Water Reclamation—A Side‐By‐Side Comparison of Low‐Pressure Membrane Pretreatments

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