scholarly journals Forward Osmosis as a Pre-Treatment Step for Seawater Dilution and Wastewater Reclamation

2018 ◽  
Author(s):  
Machawe M. Motsa ◽  
Bhekie B. Mamba
Keyword(s):  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Pre Treatment ◽  
Treatment Step

Influence of Organic Matters on Forward Osmosis Membrane Performance

2014 ◽  
Vol 535 ◽  
pp. 744-748
Author(s):  
Sheng Ji Xia ◽  
Yu Min Zhou ◽  
Jian Wei Chen ◽  
Rui Lin Yang ◽  
Xin Huan Zhang
Keyword(s):  
Alginic Acid ◽  
Water Flux ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Ultrasonic Oscillation ◽  
Organic Matters ◽  
Membrane Performance ◽  
Potential Applications ◽  
Osmotic Pressure Gradient

Forward osmosis is an emerging membrane technology with potential applications in desalination and wastewater reclamation, osmotic pressure gradient cross the FO membrane is used to generate water flux. In contrast with conventional pressure-driving membrane process, the advantage of FO is significant: energy saving, high solute rejection and low fouling propensity. In this study, alginic acid (AA), boving serum albumin (BSA), humic acid (HA) and tannic acid (TA) were used to investigate the influence of organic fouling. The flux changed obviously, the rejection was approving and the absorption of organics was observed in the study. Ultrasonic oscillation was employed to wipe the organics off the fouling membranes, which was intend to study the quality of absorption of organic matters.

Inactivation of E. Coli Using ZnO Nanofluids and Ultrasound

2014 ◽  
Vol 1004-1005 ◽  
pp. 978-982
Author(s):  
Ling Ling Zhang ◽  
Wei Qiang Sun ◽  
Yu Xia ◽  
Ya Ping Lv
Keyword(s):  
Growth Curves ◽  
E Coli ◽  
Pre Treatment ◽  
Zno Nanofluids ◽  
Treatment Step ◽  
Inhibiting Property ◽  
Inactivation Effect ◽  
Better Than

Combination of disinfection method gives advantages. In this work, inactivation of E. coli using ZnO nanofluids and ultrasound is evaluated. Growth curves of bacteria were investigated to reveal the inactivation activities of ZnO nanofluids and ultrasound. The effects of combination of ZnO nanofluids and ultrasound, ultrasound time, ultrasound induction point and the induction order of ZnO nanofluids and ultrasound were studied. The results suggested that combination of ZnO nanofluids and ultrasound gives better inactivation effect on E. coli when comparing with single disinfection method. Ultrasound for 10 s helped ZnO nanofluids inhibiting bacteria better than ultrasound for 30 s /60 s. Ultrasound induction point (at 0 hr, 2 hr or 4hr) did not affect on ZnO nanofluids to exhibit the inhibiting property. Induction ultrasound prior to adding ZnO nanofluids showed the better inactivation effect on E. coli. The results also displayed that in this work, ultrasound was mainly worked as a pre-treatment step, instead of a disinfection method.

scholarly journals Enhanced synthesis method of graphene oxide

2021 ◽  
Vol 3 (1) ◽  
pp. 223-230
Author(s):  
Zineb Benzait ◽  
Pengwan Chen ◽  
Levent Trabzon
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Synthesis Method ◽  
Environmentally Friendly ◽  
Mechanical And Electrical Properties ◽  
Pre Treatment ◽  
Treatment Step

A simple and environmentally friendly pre-treatment step allows the production of graphene oxide with few defects and high mechanical and electrical properties.

Effect of feed temperature and membrane orientation on pre-treatment sludge volume reduction through forward osmosis

2014 ◽  
Vol 54 (4-5) ◽  
pp. 838-844 ◽  
Author(s):  
S. Liyanaarachchi ◽  
V. Jegatheesan ◽  
I. Obagbemi ◽  
S. Muthukumaran ◽  
L. Shu
Keyword(s):  
Forward Osmosis ◽  
Volume Reduction ◽  
Membrane Orientation ◽  
Pre Treatment ◽  
Feed Temperature

Coagulation-adsorption-ultrafiltration for wastewater treatment and reuse

2003 ◽  
Vol 3 (5-6) ◽  
pp. 361-365 ◽  
Author(s):  
D. Abdessemed ◽  
G. Nezzal ◽  
R. Ben Aim
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Domestic Wastewater ◽  
Powdered Activated Carbon ◽  
Cod Removal ◽  
Wastewater Reclamation ◽  
Wastewater Reclamation And Reuse ◽  
Pre Treatment ◽  
Uf Membranes ◽  
Tubular Membranes

We considered the treatment of domestic wastewater by coagulation–adsorption–ultrafiltration, and a test of adsorption like pre-treatment to the membrane as an alternative for wastewater reclamation and reuse. The performances of two inorganic tubular membranes (M2 and M5 CARBOSEP with 15,000 Da and 10,000 Da MWCO) were studied. Powdered activated carbon was used as adsorbent agent and FeCl3 as a coagulant. Coupling adsorption and ultrafiltration resulted in satisfactory results: the efficiency of COD removal was increased by using PAC compared with results obtained when using only UF membranes.

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