Research Abstracts

Micellar-enhanced ultrafiltration (MEUF) was studied to remove reactive dyes from aqueous solution. Two different types of reactive dyes, C.I Reactive Black 5 (RB5) and C.I Reactive Orange 16 (RO16) were tested. A cationic surfactant, cetylpyridinium chloride (CPC) was used for the MEUF and its effe

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

The removal of phenol, p-cresol, xylenol and Cr3+ ions in simultaneous micellar-enhanced ultrafiltration process was examined. A cationic (CTAB) and anionic surfactant are selected as molecules that are able to create micelles. The rejection coefficients for solutes and surfactants were determined e

Trivalent chromium is present at high concentration in effluents from the tanning process in the leather industry. The chromium recycling process must be able to separate chromium from other cations (mainly Na+ but also Ca2+, Mg2+) because their presence has a negative effect on the quality of the t

Landfill leachate from a composting field of a Finnish municipal waste landfill was treated with sequencing batch reactor (SBR) and a submerged membrane bioreactor (MBR) fed batchwise. The average quality of the leachate was 475 mg/l suspended solids, 1240 mg/l BOD7, 10 mg/l phosphorus, and 210 mg/l

Pilot- and full-scale experiments were performed to elucidate the feasibility of using a modified cationic polymer for capital and operational cost savings. This membrane performance enhancing product is referred to as MPE50TM. Since the low flux caused by low water temperature is one of the most im

The capability of a radial basis function neural network (RBFNN) to predict long-term permeate flux decline in crossflow membrane filtration was investigated. Operating conditions of transmembrane pressure and filtration time along with feed water parameters such as particle radius, solution pH, and

Two 2D models of non-stationary and non-isothermal transfer of a strong binary electrolyte in a rectangular electrodialysis desalination cell formed by anion- and cation-exchange membranes are developed. Both gravitational and forced convection occurring in underlimiting current mode are taken into

Recent theoretical work by Sholl and coworkers has predicted that carbon nanotubes, if used as membranes, have the flux/selectivity properties that far exceed those of any other known inorganic or organic material. To verify this prediction, we have fabricated nano-composite membranes consisting of

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