Ultrafiltration

During most water treatment processes, spent filter backwash water (SFBW) is generated. Reuse of SFBW is of concern because of the possible recycling of heavy metals, precursors for disinfection by-products and microorganisms. Innovations in membrane technology, especially in micro- and ultrafiltrat

Poly(phenylene oxide) (PPO) membranes with sulfonic groups were prepared by two methods: plasma-initiated surface grafting of sodium styrenesulfonate or chemical sulfonation (with chlorosulfonic acid) of PPO, followed by membrane preparation from the modified material. The presence of ionic groups g

A low-pressure membrane process was studied in order to treat aqueous solutions containing both dye and surfactant. The influence of various textile dyes (methyl orange, indigo carmine, amido black, titan yellow or direct black) on separation efficiency of surfactants (sodium dodecyl sulphate, SDS)

Ultrafiltration separation of an anionic surface active agent belonging to the alkylsulfonate family was studied. Asymmetric membranes made of polyethersulfone, polysulfone, regenerated cellulose, cellulose acetate and polyamide with a molecular weight cut-off equal to 5, 10 and 30 kDa were used. Th

The study aimed to assess the effectiveness of meat industry wastewater treatment applying two hybrid systems of activated sludge and ultrafiltration in: (1) an aerobic bioreactor in combination with ultrafiltration and (2) a bioreactor equipped with separate denitrification and nitrification tanks

The removal of nitrate from contaminated groundwater via polyelectrolyte-enhanced ultrafiltration (UF) was investigated using different chelating polymers and membrane pore sizes. Although the percentage polymer rejection by membranes slightly decreased with higher chelating polyelectrolyte dosages,

Production of soy protein concentrates (SPC)/isolates (SPI) by traditional acidic precipitation, ultrafiltration, electro-acidification and a novel approach combining electro-acidification and ultrafiltration is reviewed. In the context of the development of a combined electro-acidification ultrafil

Membrane fouling has been identified as one of the major problems during the treatment by ultrafiltration (UF) of the cork processing wastewaters. This problem leads to the drastic reduction of the UF permeate fluxes and is often attributed to the fact that these wastewaters are rich in phenolic/tan

In this work a non-steady state model for cross flow ultrafiltration was tested and the results estimated by the model were compared with those experimentally obtained. Crossflow ultrafiltration experiments were performed in a pilot plant using tubular ZrO2-TiO2 ceramic membranes with a MWCO of 15 k

This study was conducted to understand fouling formation and effect of PAC addition in a hollow-fiber ultrafiltration membrane integrated with adsorption. Daily carbon accumulation rate and carbon mass load to UF module were estimated to be about 10 mg/L and 117 g/m2·d, respectively, however carbon