Fabrication of Antifouling Nanofiltration Polyethersulfone Membranes Functionalized with the Fumarate Ferroxane Nanoparticles for Dyes Removal from Aqueous Media

The presence of dyes in the aquatic environment can cause soil/water pollution, problems for human health, and abnormal plant growth behavior. In the present study, functionalized polyethersulfone nanofiltration membranes were prepared by ferroxane fumarate nanoparticles. Ferroxane fumarate nanoparticles were characterized by SEM and FTIR analyzes. The effect of nanoparticles on the performance and properties of membranes was determined in terms of membrane pore size, porosity, hydrophilicity, and separation of milk powder solution by membranes. The hydrophilicity of the membranes was determined by studying the pure water flux and the contact angle of the water. Hydrophilicity increased significantly in membranes containing 0.5% wt. of ferrooxane fumarate nanoparticles. The results of measuring the pure water flux passing through the prepared membranes showed that after functionalization of the polysulfone nanofiltration membrane by ferroxane fumarate nanoparticles, the permeability of this membrane increased more than three times. The maximum flux recovery ratio and the minimum irreversible permeability decay rate obtained by the M0.5 membrane were 95.20 and 4.8%, respectively.  Moreover, M0.5 showed the highest rejection for dyes of direct red 16 (99%) and methylene blue (98%). The related results proved that an antifouling fumarate ferroxane functionalized membrane can be efficiently applied for the removal of dyes

Performance of an activated sludge followed by membrane process (AS-MP) treating simulated industrial wastewaters: effects of operating factors and feed characteristics

Abstract The main aim of the present study is to determine the optimum operating conditions for different feed compositions with less irreversible membrane fouling in an activated sludge followed by membrane process (AS-MP). In this regard, three different wastewaters with different BOD5/COD ratios (0.83 for soft drink, 0.63 for pineapple fruit juice and 0.36 for amoxicillin) as an index of biodegradability were selected. The AS-MP system was operated with biomass concentration of 7000–8000 mg/l and different hydraulic retention times (HRTs) in the range of 4–20 h. The optimal HRT was decreased as BOD5/COD ratio was increased. In order to investigate fouling behavior of membranes in the AS-MP, a commercial polyvinylidene fluoride (PVDF) microfiltration (MF) membrane and high-performance synthetic ZnFe2O4/SiO2 embedded polyether sulfone (PES) ultrafiltration (UF) membrane were applied. As a result, the UF membrane indicated the highest flux recovery ratio (FRR) for pineapple fruit juice wastewater relative to the other wastewaters. Soft drink wastewater had the maximum permeability and FRR for MF membrane due to low turbidity of the feed and low interaction with MF membrane composition, whereas this wastewater showed a lower permeability and FRR in the UF membrane, implying an effective interaction between the residual soluble microbial products and the UF membrane composition. Both membranes showed almost the same performance for amoxicillin wastewater

Preparation and Characterization of Antifouling Mixed Matrix Microfiltration Membranes Modified by Metal-Organic Frameworks for Usage in Membrane Bioreactor (MBR)

This study presents the preparation, characterization, and performance evaluation of antifouling mixed matrix microfiltration membranes. The main purpose of this study was to investigate the influences of metal-organic frameworks (MOFs) as nanofiller on the fabrication of polyvinylidene difluoride (PVDF) mixed matrix membrane prepared via the phase inversion method. The scanning electron microscopy (SEM) images displayed that the pore size and porosity of the prepared membranes was increased by adding the MOF. By adding 0.3 wt% of the MOF, the pure water flux was maximized to be 1525.37 kg/ m2.h, which was owing to the excellent permeability of the MOF/PVDF membrane during the long-term filtration in cross flow setup. The flux recovery ratio (FRR) was also increased up to 80%. In order to assess antifouling performance of the modified membrane, the fouling parameters was evaluated using the effluent from the jet loop-airlift reactor with the turbidity of 11 NTU as a fouling factor. The 0.3 wt.% TMU-5 MOFs/PVDF membrane showed the high hydrophilicity with contact angle of 66.93° and the lowest irreversible fouling resistance (Rir) value of 4.55%. As a conclusion, the MOF/PVDF membranes represented good selectivity and antifouling properties during long-term microfiltration experiments

Preparation and characterization of PES nanofiltration membrane embedded with modified graphene oxide for dye removal from algal wastewater

The present work was concentrated to study the ability of nanofiltration membrane as a treatment method of algal colored wastewater discharge from Islamabad refinery, Kermanshah, Iran. The polyether sulfone nanofiltration membrane was modified with sodium dodecyl sulfate (SDS) as an anionic surfactant and applied for treatment of colored wastewater. Water contact angle Scanning electron microscopy (SEM) and were applied to characterization of prepared membranes. The pure water flux, relative flux reduction as a parameter that represents antifouling property of membrane and also dye rejection were studied by dead-end and cross-flow filtration system in the present research. The period of the filtration time was extended about 6 hours to evaluate the stability and flux reduction of membrane. The results indicated 23.26% flux reduction was observed for modified membrane that confirms the antifouling property of prepared membrane. The results demonstrated that the permeate was completely transparent (100% dye removal, 98.2% turbidity removal), and the pure water flux was enhanced for modified membrane to 27.21 (Kg/m².h). In the present research nanocomposite polymeric membrane are introduced as an appropriate option for the treatment of natural colored wastewater

Separation of Oil-Water Emulation with High Efficiency Using Mixed Matrix Microfiltration Modified Membrane

FSM-16 mesoporous silica modified with metformin (FSM-16-Met) is known as a suitable additive for membrane modification in order to obtain a modified membrane with anti-fouling capability for highly efficient oily wastewater treatment. In this research, the production of polyether sulfone microfiltration membranes was done using an efficient modification process. The modified membrane with FSM-16-Met nanoparticles showed excellent fouling resistance, while maintaining a high net water transfer efficiency of more than 150 kg/m2.h without significant oil infiltration. The optimal modified membrane PES/FSM-16-Met had a high net water flux of 156.07 kg/m2.h and a low contact angle compared with the unmodified membrane (respectively 79.8 and 46.25 for the unmodified and was the modified optimum). Also, the flux recovery ratio is more than 97% and the ability to resist clogging is Rir = 79.58 and Rir = 2.13%, respectively, for unmodified and modified membranes during filtration at different concentrations of oily feed (300 and 500 mg/l). It was one of the features obtained in this study. Overall, this work provides insight into efficient polymer membrane modifications with very low oil cake layer formation on the membrane surface, which shows great potential for industrial-scale oily wastewater treatment in the future

Diseño de un sistema de tratamiento de efluentes producidos por una empresa procesadora de productos lácteos

Trabajo de investigaciónEn el estudio se describirán una serie de análisis fisicoquímicos realizados al agua residual realizados a nivel de laboratorio a partir de la recolección de muestra de las empresas lácteas llamadas “San Jerónimo Cajicá Cabrera” y “Hermanos SAS”, ubicadas en Hato grande municipio de Cajicá. Para la propuesta del diseño de los equipos necesarios para el tratamiento de los efluentes líquidos de una planta procesadora lácteos.1. TITULO 2. LÍNEA DE INVESTIGACIÓN 3. OBJETIVOS 4. INTRODUCCIÓN 5. JUSTIFICACIÓN 6. ALCANCES Y LIMITACIONES 7. PL 8. MARCO DE REFERENCIA 9. MARCO METODOLÓGICO 10. CRONOGRAMA DE ACTIVIDADES 11. PRODUCTOS POR ENTREGAR 12. INSTALACIONES Y EQUIPO REQUERIDO 13. PRESUPUESTO DEL TRABAJO Y RECURSOS FINANCIEROS 14. ESTRATEGIAS DE COMUNICACIÓN Y DIVULGACIÓN 15. RESULTADOS Y DISCUSIÓN 16. CONCLUSIONES REFERENCIASPregradoIngeniero Civi

Engineering nanocomposite membranes: Addressing current challenges and future opportunities

The engineering of novel membranes through fabrication and modification using engineered nanoscale materials (ENMs) presents tremendous opportunity within desalination and water treatment. In this paper, we present an overview of the applications of ENMs to organic polymeric membranes and desalination. The review will examine the motivation for introducing ENMs into polymeric membranes identifying how the characteristics of the ENMs, such as high surface area to volume ratio and mechanical strength, can be used to optimise and tailor membranes for particular applications. The overview will include ENM's classification, incorporation strategies and how their properties impact on the surface characteristics, robustness, functionality, morphologies and antifouling properties of polymeric membranes. The review will also feature discussion on the current issues facing the development and commercialization of nanocomposite membrane that harness the benefits of ENMs

Enhancement in performance and self-cleaning properties of PES membrane surface tailored by modified TiO2

In this study, the polyethersulfone (PES) membranes were established by surface modification using C, N codoped-TiO2/WO3 (LTW) photocatalytic nanocomposite to amelioration of the membrane performance in terms of antifouling and self-cleaning properties. The nanocomposite membranes were characterized by ATR-FTIR, SEM, AFM, and water contact angle (WCA). The photocatalytic membranes' performance was evaluated using assessment of the pure water flux (PWF), antifouling behavior, photoactivity, and long-term filtration. The membrane modification improved morphology and hydrophilicity of the membranes surface, contributing to the enhanced permeability (PWF of 49.65 kg/m2.h), and substantial antifouling property (FRR of 96.96 %) as well as photoactivity (94.36 % dye removal) of the optimal photocatalytic membrane (M3 membrane). The long-term filtration of the optimal membrane represented its high performance and noteworthy antifouling resistance