Antifouling performance of polytetrafluoroethylene and polyvinylidene fluoride ultrafiltration membranes during alkali/surfactant/polymer flooding wastewater treatment: Distinctions and mechanisms

2018 ◽  
Vol 642 ◽  
pp. 988-998 ◽  
Author(s):  
Youbing Zhu ◽  
Shuili Yu ◽  
Bing Zhang ◽  
Jianfeng Li ◽  
Dongsheng Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Polyvinylidene Fluoride ◽  
Polymer Flooding ◽  
Ultrafiltration Membranes

Submerged Ultrafiltration for Minimizing Energy Process of Refinery Wastewater Treatment

2013 ◽  
Vol 789 ◽  
pp. 531-537
Author(s):  
Erna Yuliawati ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Wastewater Treatment ◽  
Polyvinylidene Fluoride ◽  
Membrane Surface ◽  
Suspended Solid ◽  
Hollow Fibers ◽  
Refinery Wastewater ◽  
Permeate Flux ◽  
Energy Process ◽  
Oil Refineries ◽  
And Performance

Refinery wastewater treatment is needed especially in the oil-producing arid regions such as oil refineries due to water scarcity. One of potentially applicable process to treat refinery wastewater is a submerged membrane technology. However, the application of submerged membrane systems for industrial wastewater treatment is still in its infancy due to significant variety in wastewater composition and high operational costs. Aim of this study was to investigate ultrafiltration (UF) membrane morphology and performance for refinery produced wastewater treatment. Submerged UF bundle was equipped using polyvinylidene fluoride (PVDF) hollow fibers, which added by dispersing lithium chloride monohydrate (LiCl.H2O) and titanium dioxide (TiO2). The comparison of morphological and performance tests was conducted on prepared PVDF ultrafiltration membranes. Distinctive changes were observed in membrane characteristics in term of membrane wettability, tensile testing and roughness measurement. Mean pore size and surface porosity were calculated based on permeate flux. Fouling characteristics for hydrophilic PVDF hollow fibers fouled with suspended solid matter was also investigated. Mixed liquor suspended solid (MLSS) of 3 g/L and 4.5 g/L were assessed by using submerged PVDF membrane with varied air bubble flow rates. Results showed that effect of air bubbles flow rate of 2.4 ml/min increased flux, total suspended solids (TSS) and sulfide removal of 148.82 L/m2h, 99.82 % and 89.2%, respectively due to increase of turbulence around fibers, which exerts shear stress to minimize particles deposited on membrane surface. It was concluded that submerged ultrafiltration is an available option to minimize energy process for treating such wastewater solution.

scholarly journals Preparation, characterization and dyeing wastewater treatment of a new PVDF/PMMA five-bore UF membrane with β-cyclodextrin and additive combinations

2021 ◽  
Author(s):  
Xiaozheng Bian ◽  
Jianping Huang ◽  
Lin Qiu ◽  
Chunyan Ma ◽  
Danli Xi
Keyword(s):  
Wastewater Treatment ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Membrane Fouling ◽  
Bovine Serum ◽  
Polyvinylidene Fluoride ◽  
Hollow Fiber Membrane ◽  
Pure Water ◽  
Water Flux ◽  
Dyeing Wastewater

Abstract A new type of polyvinylidene fluoride (PVDF)/polymethyl methacrylate (PMMA) hollow fiber membrane (HFM) with five bores was prepared. The effects of Polyvinylpyrrolidone (PVP), β-cyclodextrine (β-CD), Polyethylene Glycol (PEG) and Polysorbate 80 (Tween 80) and their combinations on the PVDF/PMMA five-bore HFMs were investigated. The performance and fouling characteristics of five-bore HFMs for dyeing wastewater treatment were evaluated. Results indicated that adding 5wt.% PVP could increase the porosity and water flux of the membrane but decrease the bovine serum albumin (BSA) rejection rate. Adding 5wt.% β-CD significantly improved the tensile and rejection of the HFMs without showing effect on the increase of water flux. The characteristic of the HFMs with different additives combinations proved that the mixture of 5wt.% PVP and 1wt.% β-CD obtained the best membrane performance, with a pure water flux of 427.9 L/ m2·h, a contact angle of 25°, and a rejection to bovine serum albumin (BSA) of 89.7%. The CODcr and UV254 removal rates of dyeing wastewater treatment were 61.10% and 50.41%, respectively. No breakage or leakage points were found after 120d operation showing the reliable mechanical properties. We set the operating flux to 55 L/m2·h and cross flow rate to 10% which can effectively control membrane fouling.

Pilot Study on Ultrafiltration of Produced Water from Polymer Flooding for Reuse

2010 ◽  
Vol 113-116 ◽  
pp. 1266-1269 ◽  
Author(s):  
Jun Xu ◽  
Wen Xin Shi ◽  
Shui Li Yu ◽  
Wen Ming Qu
Keyword(s):  
Crude Oil ◽  
Polyvinylidene Fluoride ◽  
Produced Water ◽  
Reduction Factor ◽  
Polymer Flooding ◽  
Transmembrane Pressure ◽  
Operation Conditions ◽  
Membrane Flux ◽  
Crossflow Velocity ◽  
Hydrolyzed Polyacrylamide

Produced water from polymer flooding (PWfPF) in oilfield is high contents of crude oil, total suspension substance (TSS), hydrolyzed polyacrylamide and salinity. Most existing traditional processes in China are incapable to treat PWfPF to meet the reinjection water quality for low and ultra-low permeability reservoirs. In the present paper, a hydrophilized tubular polyvinylidene fluoride (PVDF) membrane with a total active area of 110 m2 manufactured by our laboratory was used for ultrafiltration of the PWfPF. The temperature and volume reduction factor (VRF) of the PWfPF were fixed at 37 °C and 4, respectively. The influences of transmembrane pressure (TMP) and crossflow velocity on the membrane flux were investigated. The experimental results showed that a TMP of 0.20 MPa and crossflow velocity of 4.5 m/s were the optimum operation conditions. Under the above conditions, long-term filtration experiments were conducted for 12 months to evaluate the effectiveness of the membrane. The obtained results revealed that the membrane average flux could reach 75 L/(m2•h) and the flux recovery was more than 95%. In the permeate, the content of crude oil and turbidity were respectively lower than 1 mg/L and 1 NTU, while the TSS was consistently below detection limits (2.5 mg/L), all of which reached the highest reinjection criteria for oilfield in China and demonstrated that the membrane has a good anti-fouling characteristics to PWfPF.

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