Ultrafiltration

Natural Organic Matter (NOM) is abundant in natural waters and is one of the major fouling agents during membrane filtration of surface water. This work addresses the evaluation of the influence of the membrane pore size on the permeation characteristics of humic acid solutions. Five cellulose aceta

The aim of this study is to determinate optimum conditions, membrane configuration, air flow, coagulation rate, permeate flux, for the ultrafiltration of surface water. Results show how coagulation is a necessary pre-treatment to remove micro-particles in aqueous suspension (i) before a conventional

Wastewater effluent organic matter (EfOM) was isolated into different fractions including colloids, and hydrophobic (HPO) and transphilic (TPI) fractions. The EfOM isolates were characterized by different techniques, for example, size exclusion chromatography (SEC) with on-line UVA and DOC detectors

Coagulation with only rapid mixing in a separate tank (ordinary coagulation) and coagulation with no mixing tank (in-line coagulation) were applied prior to ultrafiltration with an inside-out type hollow fiber membrane. In result the filterability at the former conditions was superior in both the cr

The aim of this work is to develop a predictive control algorithm to improve the productivity of an ultrafiltration pilot plant producing drinking water from surface raw water. The objective is to avoid irreversible fouling, that means to get a constant quality of the membrane after backwash and at

The aim of this paper is the presentation of a novel system for continuous monitoring of the operating variables involved in ultrafiltration process. The proposed system is based on the utilization of a data acquisition set, consisting of field point units supplied by National Instruments, connected

This presentation gives methods by which ultrafiltration and crossflow microfiltration system designs can be developed and optimized when data are available relating flux rate and membrane rejection to concentration and to other parameters. System layouts considered include batch, single-stage feed-

The decline of permeate flux for ultrafiltration along membrane tubes was predicted from mass and momentum balances, based on the resistance-in-series model coupled with the considerations of the declinations of flow rate and transmembrane pressure along the membrane tubes. It is concluded that the

A theoretical study is developed for the modelling of mass accumulation from the polarised layer to the formation of a deposit. Concentrated suspension properties are accounted for through a solid pressure corresponding to osmotic pressure in the suspension and to compression resistance in the depos

The increasing demands for wastewater treatment and the establishment of new processes and systems necessitate applied research. Especially in the field of membrane technology new areas for wastewater treatment can be opened for implementation. Membrane bioreactors usually find their application fie