Characterization of membrane biofouling in nanofiltration processes of wastewater treatment

Ivnitsky, Hanan; Katz, Ilan; Minz, Dror; Shimoni, Eyal; Chen, Y.; Tarchitzky, Jorge; Semiat, Raphael; Dosoretz, Carlos G.

doi:10.1016/j.desal.2005.03.081

Cited by 136 publications

(58 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biofouling often occurs in RO and NF processes. 4 Microorganisms adsorb onto the membrane surface and form a biofouling layer. Chlorine disinfectant is commonly used in water desalination to reduce biofouling.…”

Section: Introductionmentioning

confidence: 99%

Development of a chlorine‐resistant polyamide nanofiltration membrane and its field‐test results

Shintani

Matsuyama

Kurata

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

For the development of chlorine-resistant nanofiltration membranes, a thin-film-composite membrane was prepared by the interfacial polymerization of N-phenylethylenediamine and 1,3,5-benzenetricarbonyl trichloride on a microporous polysulfone support substrate. The polymerization on the substrate surface was confirmed by Fourier transform infrared measurements, and membrane surface properties such as the roughness and f potential were characterized. Rejections of NaCl and isopropyl alcohol of the prepared membrane were 95 and 50%, respectively. The membrane showed much higher chlorine resistance than a commercial polyamide membrane when the membranes were immersed in an aqueous NaOCl solution. A field test was carried out with a spiral-type membrane module. Tap water was treated by this module for more than 70 days under the condition of continuous NaOCl injection. The prepared membrane module was quite stable, and no distinguished change in the rejection and flux was recognized.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of a chlorine‐resistant polyamide nanofiltration membrane and its field‐test results

Shintani

Matsuyama

Kurata

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Organic fouling is governed in part by interactions between the membrane surface and the organic foulants, as well as between the organic foulants themselves (Dalvi et al, 2000). Microbial attachment and growth on the membrane surface leads to the formation of biofilms, which consist of microbial cells embedded in an extracellular polymeric substances matrix produced by the microbes (Ivnitskya et al, 2005). Despite various research efforts, to date the characterization of sea water fouling of RO membranes has not progressed significantly, compared to low-pressure membrane fouling by surface and ground waters (Kumar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

An autopsy study of a fouled reverse osmosis membrane element used in a brackish water treatment plant

et al. 2007

View full text Add to dashboard Cite

The fouling of a spiral wound RO membrane after nearly one year of service in a brackish water treatment plant was investigated using optical and electron microscopic methods, FTIR and ICP-AES. Both the top surface and the cross-section of the fouled membrane were analysed to monitor the development of the fouling layer. It has been found that the extent of fouling was uneven across the membrane surface with regions underneath or in the vicinity of the strands of the feed spacer being more severely affected. The fouling appeared to have developed through different stages. In particular, it consisted of an initial thin fouling layer of an amorphous matrix with embedded particulate matter. The amorphous matrix comprised organic-Al-P complexes and the particulate matter was mostly aluminium silicates.Subsequently, as the fouling layer reached a thickness of about 5 to 7 μm, further amorphous material, which is suggested to include extracellular polymeric substances such as polysaccharides, started to deposit on top of the existing fouling layer. This secondary amorphous material did not seem to contain any particulate matter nor any inorganic elements 1 25 26 27 28 29 within it, but acted as a substrate upon which aluminium silicate crystals grew exclusively in the absence of other foulants, including natural organic matter (NOM).

show abstract

“…To improve the strength of synthetic sludge, it is necessary to change the microsphere surface properties through addition of EPS or other groups. This chemical modification method makes it feasible to prepare microspheres similar to microorganisms and synthetic sludge with identical surface characteristics to the real activated sludge [25][26][27].…”

Section: Settling Properties Of the Polystyrene Latex Microspheresmentioning

confidence: 99%

A new polystyrene-latex-based and EPS-containing synthetic sludge

Wang

Chen

Zheng

et al. 2011

Front. Environ. Sci. Eng.

View full text Add to dashboard Cite

Since the living microorganisms in activated sludge continuously change, it is difficult to conduct controlled experiments and achieve reproducible results for evaluating sludge characteristics. Synthetic sludge, as a chemical surrogate to activated sludge, could be used to investigate the sludge physicochemical properties, and it is desirable to prepare synthetic sludge with similar structure and properties to real activated sludge to explore the flocculation and settlement processes in activated sludge systems. In this work, a high-strength synthetic sludge was prepared with functional polystyrene latex particles as the framework and extracellular polymeric substances (EPS) to modify its surface. The flocculation and settling characteristics of the microspheres and the prepared synthetic sludge were tested. Compared with other three functional polystyrene latex microspheres, the synthetic sludge prepared with EPS-modified polystyrene latex microspheres showed good settling characteristics and a significantly higher strength. They could be used for studying the physicochemical properties of activated sludge.

show abstract

Characterization of membrane biofouling in nanofiltration processes of wastewater treatment

Cited by 136 publications

References 7 publications

Development of a chlorine‐resistant polyamide nanofiltration membrane and its field‐test results

Development of a chlorine‐resistant polyamide nanofiltration membrane and its field‐test results

An autopsy study of a fouled reverse osmosis membrane element used in a brackish water treatment plant

A new polystyrene-latex-based and EPS-containing synthetic sludge

Contact Info

Product

Resources

About