Selective particle separation using Dynamic Acoustic Fields

Separation of particles from suspensions has been an integral part of many industrial, chemical and biological processes. Traditional methods such as sieving, flocculation, centrifugation etc. have many demerits. This has lead to an interest in unconventional separation methods that use physical properties of the particles. Acoustophoresis is...

Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch

In 2013, Brabant Water (BW) adopted a new goal of &lt;1 μg/l for As level in the drinking water, resulting in the need to enhance As removal at seven water treatment plants (WPT’s), including WTP Prinsenbosch (As = 2.6 μg/l). Earlier experiences of BW at WTP Dorst had shown that dosing of NaMnO4 to an aeration-filtration system efficiently...

Chemical Stability of Ceramic Membrane

Analysis of Alginate-like Exopolysaccharides for the Application in Enhanced Oil Recovery

Alginate-like exopolysaccharides (ALE) can be extracted from granular sludge, which is produced during aerobic granular sludge waste water treatment as a waste product. Processing the waste is a costly operation. It is believed that ALE consist mostly of alginates. The chemical and mechanical properties of alginates are potential for the...

Acoustic coagulation of aerosols

Flue gas from combustion or syngas from gasification can contain fine particles, so called aerosols. These can be potentially harmful for downstream equipment or if emitted to the atmosphere, be inhaled by humans and cause respiratory problems. Standard practice to mitigate this is to use a cyclone which has a low filtration efficiency for sub...

A CT scan aided core-flood study of the leak-off process in oil-based drilling fluids

An experimental study on the leak-off of oil based drilling fluid sandstone cores is reported. First we revised the theoretical models for the rheology of the drilling fluid, the flow behavior of drilling fluids in the drill pipe and annulus, and filtration mechanisms. Then systematic static leak-off experiments were carried out using an...

Influence of temperature on filtration in membrane bioreactors

This report presents a study of the effect of temperature on the sludge in the MBR and on filterability. For three wastewater characteristics the relation with the temperature and filterability is determined: the sludge viscosity, the soluble microbial products (SMP) concentration and the particle size distribution. Chapter 2 attends to the...