One-year operational experience with ultrafiltration as pretreatment of seawater reverse osmosis desalination system (Maspalomas-I Plant)

Suárez, Javier; Salgado, Blanca; Casañas, Antonio; González, Juan Carlos; Pordomingo, Jorge

doi:10.1080/19443994.2014.959742

Cited by 9 publications

(6 citation statements)

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“…Physical pretreatment is less expensive than traditional chemical pretreatment since no additional chemicals need to be added, this includes the additional costs of the UF membranes [71]. Hollow fiber UF technology has increasingly gained acceptance as a viable alternative for seawater pretreatment [72][73][74]. Reasons for the increasing interest in UF pretreatment over conventional approaches include superior and more consistent filtrate water quality, ability to cope with variable feed water quality, lower plant footprint, and competitive cost [72].…”

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

“…Hollow fiber UF technology has increasingly gained acceptance as a viable alternative for seawater pretreatment [72][73][74]. Reasons for the increasing interest in UF pretreatment over conventional approaches include superior and more consistent filtrate water quality, ability to cope with variable feed water quality, lower plant footprint, and competitive cost [72]. UF membranes with a pore size of 0.02 µm have been the most effective for removing silt, algae, bacteria, and large molecular weight organics [70].…”

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

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Critical aspects of RO desalination: A combination strategy

et al. 2017

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Due to a significant drop in the energy needed for RO desalination from 12 kWh/m 3 to ~2 kWh/m 3 over the past 20 years, which is close to 1 kWh/m 3 , the theoretical minimum for recovering salt-free water from seawater, the focus here is on the critical aspects that offer opportunities to further reduce costs. These include pre-and post-treatment; and analysis and optimization of the performance of RO systems, such as selectivity, capacity, and flux decline. Flux decline includes concentration polarization and fouling from inorganic, organic, biological constituents. We call these the "three legs' that undergird all membrane processes. The approach here is quantitative and includes detailed fluid mechanics and associated mass transfer of RO systems for optimizing performance.

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Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

Section: Fouling Mitigation Strategies I Pretreatmentmentioning

confidence: 99%

Critical aspects of RO desalination: A combination strategy

et al. 2017

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“…Membrane technology has become integral for separation processes in the water industry including seawater desalination, 1–3 municipal/industrial wastewater treatment, 4,5 and other industries such as food processing 6 . The success of membranes can be attributed to their high separation performance, including consistency in permeate quality, the ease of operation and significant reductions of capital and process costs 7–10 . However, fouling, including biofouling is a critical issue for every membrane system, decreasing the membrane's lifetime and limiting more widespread application 11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…Electron rich moieties (aromatic rings) are also susceptible to direct chlorination including sequential (step) chlorination of amides followed by intermolecular rearrangement, forming various aromatic substitution products 30,31 . These reactions are known as N‐chlorination and Orton re‐arrangement, respectively, and can lead to degradation of membranes by creating void space openings resulting in higher water flux and/or solute carryover into the membrane permeate 8,31 …”

Section: Introductionmentioning

confidence: 99%

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Alhweij

Amura

Wenk

et al. 2021

J of Applied Polymer Sci

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Membranes heavily rely on chlorination to diminish (bio)fouling, but chlorination can also lead to membrane degradation. We developed sulfonated polyaniline (S‐PANI) ultrafiltration (UF) membranes with improved chlorine resistance and intrinsic antifouling properties. The S‐PANI membranes were synthesized through Non‐solvent Induced Phase Separation (NIPS). Membrane performance was evaluated under harsh chlorine conditions (250 ppm sodium hypochlorite for 3 days under different pH conditions). The S‐PANI membranes showed improved chlorine resistance including a stable performance without changes in model foulant BSA rejection. In contrast, PANI membranes suffered critical structural damage with complete leakage and commercial PES membranes showed a 76% increase in pure water flux and a noticeable change in BSA rejection. Small changes in S‐PANI membrane performance could be linked to membrane structural changes with pH, as confirmed by SEM, IR spectroscopy, and contact angle measurements. Additionally, the S‐PANI membranes showed better antifouling properties with a high flux recovery ratio in comparison to PANI membranes using alginic acid, humic acid, and BSA model foulants. Chemical cleaning by sodium hypochlorite re‐instated the transport properties to its initial condition. Overall, the developed S‐PANI membranes have a high chlorine tolerance and enhanced antifouling properties making them promising for a range of UF membrane applications.

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“…Additionally, a smaller process footprint, less chemical dosage and fully automatic operation is possible when using UF (Xu et al 2012). Suarez et al (2015) offers one-year operational data for an UF-RO plant. According to their findings, the consistent high quality UF filtrate and reduced SDI in comparison to the previously installed multimedia filters improved reliability and operability of the desalination plant.…”

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confidence: 99%