Mihaela Dascalu

• PhD Student at University of Bacău

This paper presents a mathematical modeling for a series of experiments in which humic acid (AH) and calcium chloride (CaCl2) were used, in order to visualize the amount of contaminant before and after the nanofiltration (NF) process, using Excitation Emission Matrix Spectroscopy (EEMS). It allows to a better understanding of membrane fouling. The...

A mathematical model regarding water filtration with a nanofiltration (NF) titanium dioxide ceramic membrane is presented. The experiments aimed to use the excitation-emission matrix (EEM) spectroscopy method to highlight the existence of humic acid (HA) in water, before and after the NF process. Following the established operating conditions, expe...

Cross flow filtration is the typical way that water is filtered in membrane technology; that means that feed solution passes tangencially over the membrane and rejected components are washed away of the membrane by the rejected stream. In such a way, that minimal solids building up and at constant low flow resistance are achieved. In this paper, a...

The purpose of this research was to visualize the fouling process of a flat-sheet polymeric membrane into a flow cell, using particles to study their deposition onto the membrane surface. This set of experiments was analyzed from an imagistic point of view, designing for this purpose a measuring installation where hydrodynamic surface evaluation wa...

In recent years, membrane technology is increasingly being studied and thus became even more used in the production of drinking water. However, the presence of foulants in natural waters, as humic acids, affects strongly the efficiency of membrane processes. This study has been aimed to study humic acid (HA) rejection using a new TiO2 ceramic nanof...

A high importance is given to the studies concerning the most reliable mixing process with a minimum of energy consumption, because the mixing process is an often used operation in various industries. The main purpose of this paper is to determine and to identify the behavior of the dispersed phase, in this case, the solid particle, during the mixi...

Membrane technology has become a fundamental unit operation in the industry and society of nowadays and fouling is, probably, the most important concern related with this technology. Fouling is a complex process that can limit the performances of facilities using membranes. Many research efforts have been done in order to reduce fouling tendency. C...

In the last years, membrane technology has become increasingly studied and so has become more and more used in drinking water production. In this study, the removal of humic acids (HAs) using two different TiO2 ceramic nanofiltration membranes with increased surface (1.25m2) have been investigated. One of them has special coating for fouling resili...

Membrane technology plays an essential role in sustainability: improving water treatments and efficiency, reducing energy consumptions, etc. However, new developments in membrane materials are leading to a new scenario of enhanced performances. In this paper, a comparison between two new kinds of ceramic nanofiltration membranes of TiO2 with enlarg...

The flocculation process is applied in wastewater treatment to separate the destabilized colloid particles (or the particles formed during the coagulation phase) by forming flocs. The scope of this research was to identify the predictability of the synthetic organic flocculants use for industrial wastewater treatment. The research was performed at...

A high importance is given to the studies concerning the most reliable mixing process with a minimum of energy consumption, because the mixing process is an often used operation in various industries. The main purpose of this paper is to determine and to identify the behavior of the dispersed phase, in this case, the solid particle, during the mixi...

A high importance is given to the studies concerning the most reliable mixing process with a minimum of energy consumption, because the mixing process is an often used operation in various industries. The main purpose of this paper is to determine and to identify the behavior of the dispersed phase, in this case, the solid particle, during the mixi...

Organic polymeric membranes are the most used kind of desalination membranes. But currently, new types of inorganic membranes are being developed to overcome polymeric membrane limitations, such as increased flux, fouling resistant capacities. Operating conditions (pressure, cross flow velocity, temperature, etc) affect strongly the performance of...

A high importance is given to the studies concerning the most reliable mixing process with a minimum of energy consumption, because the mixing process is an often used operation in various industries. The main purpose of this paper is to determine and to identify the behaviour of the dispersed phase, in this case, the solid particle, during the mix...

The industrial development, the demographic growth and the limitation of the natural regions have determined a continuous degradation of the water quality due to high concentrations and complexity of pollutants from the wastewater. The centralized and decentralized treatment systems apply treatment procedures and techniques which can be complementa...