Pretreatment of seawater: Results of pilot trials in Singapore

Chua, Koon Jiew; Hawlader, Mohammad Nurul Alam; Malek, Abdul

doi:10.1016/s0011-9164(03)90075-0

Cited by 121 publications

(57 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…RO membranes are very sensitive to foulants, so enhanced pretreatment via low-pressure membranes can significantly improve the performance and reduce the energy cost of RO plants [51]. In particular, RO systems with submerged membrane pretreatment have been proven to exhibit a consistently lower silt-density index (SDI) relative to conventional pretreatment [7,40,41,54,55]. Gravity-driven membrane filtration, which was initially developed as a low-energy process for surface water and diluted wastewater treatment, has also shown potential for seawater pretreatment that requires less energy and no chemical cleaning [56,57].…”

Section: Pretreatment For Ro Desalination and Reclamationmentioning

confidence: 99%

“…Chua et al [41] reported that, for a pilot-scale pressurized HF module, prolonging the duration of backwashing was found to be more effective than air scouring in controlling membrane plugging. Studies by Ye et al [26] showed that increasing the backwash duration from 10 to 30 s led to the final TMP and fouling rate decreasing by more than 50% as well as a slight increase in the percentage of fouling removed by backwashing.…”

Section: Backwashingmentioning

confidence: 99%

See 1 more Smart Citation

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

View full text Add to dashboard Cite

Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

show abstract

Section: Pretreatment For Ro Desalination and Reclamationmentioning

confidence: 99%

Section: Backwashingmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Conventional pretreatment systems that have been widely used include flocculation/coagulation and dual media/sand filtration [4][5][6] but these systems are generally not able to provide a stable silt density index (SDI) value in the RO feed water [5]. Changing sea water conditions result in high total suspended solids (TSS) which can result in breakthrough during conventional pretreatment and will adversely impact the performance of downstream RO systems.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, large amount of chemicals have to be consumed to achieve good agglomeration of particulates for effective removal by dual-media filtration [6]. Several studies have concluded that ultrafiltration (UF) membranes can produce pretreated water quality that is more superior to that obtained from conventional pretreatment systems [4,5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Hong

Moosa

Mink

2015

Desalination and Water Treatment

View full text Add to dashboard Cite

This study demonstrated the use of high-throughput sequencing to assess the efficacy of an integrated Ultrafiltration (UF)-Reverse Osmosis (RO) desalination pilot plant located at the Arabian Gulf, and to identify potential microbial-associated problems that may arise in this plant.When integrated into the desalination treatment system, the UF membranes were able to serve as a good pretreatment strategy to delay RO fouling by achieving up to 1.96-log removal of cells from the seawater. Consequently, the differential pressure of the RO membrane remained around 1 bar for the entire 6-month study, suggesting no significant biofouling performance issue identified for this RO system. Examples of microbial populations effectively removed by the UF membranes from the feed waters included Nitrosoarchaeum limnia and phototrophic eukaryotes.Microbial-associated problems observed in this pilot plant included the presence of Pseudomonas spp. in coexistence with Desulfovibrio spp. These two bacterial populations can reduce sulfate and produce hydrogen sulfide, which would in turn cause corrosion problems or compromise membrane integrities. Chemical-enhanced backwashing (CEB) can be used as an effective strategy to minimize the associated microbial problems by removing bacterial populations including sulfate-reducers from the UF membranes.

show abstract

Membranes for Wastewater Treatment

Zirehpour¹,

Rahimpour²

2016

Nanostructured Polymer Membranes

View full text Add to dashboard Cite

Pretreatment of seawater: Results of pilot trials in Singapore

Cited by 121 publications

References 17 publications

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Membranes for Wastewater Treatment

Contact Info

Product

Resources

About