Systematic study on calcium-dissolved organic matter interaction in a forward osmosis membrane-filtration system

2016 ◽  
Vol 30 (6) ◽  
pp. 737-744 ◽  
Author(s):  
Jiyong Heo ◽  
Jonghun Han ◽  
Yejin Kim ◽  
Namguk Her
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Systematic Study ◽  
Membrane Filtration ◽  
Forward Osmosis ◽  
Filtration System ◽  
Matter Interaction

Evaluating the membrane fouling formation and chemical cleaning strategy in forward osmosis membrane filtration treating domestic sewage

2018 ◽  
Vol 4 (12) ◽  
pp. 2092-2103 ◽  
Author(s):  
Nur Hafizah Ab Hamid ◽  
Liu Ye ◽  
David K. Wang ◽  
Simon Smart ◽  
Emmanuelle Filloux ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Nitrous Acid ◽  
Membrane Filtration ◽  
Forward Osmosis ◽  
Domestic Sewage ◽  
Chemical Cleaning ◽  
Free Nitrous Acid ◽  
Fouling Control ◽  
Filtration System ◽  
Time Required

Free nitrous acid (FNA) shows strong potential as an effective cleaning reagent in fouling control in a forward osmosis filtration system, with a relatively longer time required.

Performance of ultrafiltration membrane process combined with coagulation/sedimentation

2005 ◽  
Vol 51 (6-7) ◽  
pp. 209-219 ◽  
Author(s):  
N.-Y. Jang ◽  
Y. Watanabe ◽  
S. Minegishi
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Removal Efficiency ◽  
Membrane Fouling ◽  
Pilot Plant ◽  
Membrane Filtration ◽  
Operating Pressure ◽  
Membrane Process ◽  
Bench Scale ◽  
Jar Test

Effects of coagulation/sedimentation as a pre-treatment on the dead-end ultrafiltration (UF) membrane process were studied in terms of membrane fouling and removal efficiency of natural dissolved organic matter, using Chitose River water. Two types of experiment were carried out. One was a bench scale membrane filtration with jar-test and the other was membrane filtration pilot plant combined with the Jet Mixed Separator (JMS) as a pre-coagulation/sedimentation unit. In the bench scale experiment, the effects of coagulant dosage, pH and membrane operating pressure on the membrane fouling and removal efficiency of natural dissolved organic matter were investigated. In the pilot plant experiment, we also investigated the effect of pre-coagulation/sedimentation on the membrane fouling and the removal efficiency of natural dissolved organic matter. Coagulation/sedimentation prior to membrane filtration process controlled the membrane fouling and increased the removal efficiency of natural dissolved organic matter.

Removal and transformation of dissolved organic matter (DOM) during the treatment of partially stabilized leachate in membrane bioreactor

2013 ◽  
Vol 68 (5) ◽  
pp. 1091-1099 ◽  
Author(s):  
Samunya Sanguanpak ◽  
Chart Chiemchaisri ◽  
Wilai Chiemchaisri ◽  
Kazuo Yamamoto
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Membrane Filtration ◽  
Fluorescence Spectra ◽  
Membrane Bioreactor ◽  
Leachate Treatment ◽  
Partial Removal ◽  
Fluorescence Excitation ◽  
Treatment Processes ◽  
Dom Characterization

The removal of dissolved organic matter (DOM) during municipal solid waste leachate treatment in a membrane bioreactor (MBR) was investigated. The MBR was operated with fouled and cleaned membranes, at a time. DOM, mixed liquor, and effluent were characterized by fractionation and fluorescence excitation–emission matrix (EEM) spectroscopy. Results showed DOM removals of 82% during the MBR operation with the fouled membrane. The DOM characterization indicated that most of the hydrophilic compounds and protein-like substances could be significantly removed by microbial activities in the treatment processes. Furthermore partial removal or transformation of organic substances was observed during membrane filtration. The fouled membrane improved DOM rejection by only about 2% when compared to the cleaned membrane, which demonstrated the significance of irreversible foulants on DOM rejection. There were insignificant differences in DOM fractionation and EEM fluorescence spectra between water samples filtered through the fouled and cleaned membranes.

scholarly journals Investigations of the mechanism of the fouling in microgranular adsorptive filtration

2017 ◽  
Vol 35 (1) ◽  
pp. 137-140 ◽  
Author(s):  
Beata Malczewska
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Mathematical Models ◽  
Natural Organic Matter ◽  
Natural Water ◽  
Membrane Filtration ◽  
Underlying Mechanism ◽  
Constant Flow ◽  
Filtration System ◽  
Blocking Mechanism

Abstract The application of microgranular adsorptive filtration (μGAF) has been successfully used in conjunction with membrane filtration. It proves to be efficient not only in removal of natural organic matter (NOM) but also it significantly reduces the extent of fouling. There are a few mathematical models evaluated to understand the underlying mechanism of fouling. This paper describes a method of predicting filtration capacities using constant flow datasets collected when μGAF was applied. The results suggest that the behaviour of fouling in microgranular adsorptive filtration system varies between different filtration operations and natural water quality. In analysed case the mechanism of pores blocking can be described by the complete blocking mechanism.

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