scholarly journals Fouling mechanism and control strategy of inorganic membrane

2020 ◽  
Vol 194 ◽  
pp. 04047
Author(s):  
Peng Li ◽  
Shoubin Zhang ◽  
Ying Lv ◽  
Guoqiang Ma ◽  
Xinyi Zuo
Keyword(s):  
Membrane Fouling ◽  
Control Strategies ◽  
Atomic Layer ◽  
Membrane Technology ◽  
Inorganic Membrane ◽  
Impregnation Method ◽  
Fouling Control ◽  
Layer Deposition ◽  
Treatment Technologies ◽  
And Control

Compared with the traditional treatment technologies, inorganic membrane technology is gradually becoming the mainstream of the treatment of oily and salty wastewater, but membrane fouling has become the bottleneck restricting the development of membrane technology. In order to solve this problem, the mechanism of membrane fouling and the control strategies of membrane fouling are introduced in this paper. The atomic layer deposition technology and the preparation of TiO2 nanowires (NWs) film by impregnation method were mainly introduced, aiming to provide a more reliable industrial research status in the field of membrane fouling control.

scholarly journals Membrane Fouling in Algal Separation Processes: A Review of Influencing Factors and Mechanisms

2021 ◽  
Vol 3 ◽  
Author(s):  
Andres Felipe Novoa ◽  
Johannes S. Vrouwenvelder ◽  
Luca Fortunato
Keyword(s):  
Membrane Fouling ◽  
Control Strategies ◽  
Membrane Surface ◽  
Cost Effective ◽  
Dynamic Responses ◽  
Feed Water ◽  
Operational Conditions ◽  
Term Operation ◽  
Fouling Control ◽  
And Control

The use of algal biotechnologies in the production of biofuels, food, and valuable products has gained momentum in recent years, owing to its distinctive rapid growth and compatibility to be coupled to wastewater treatment in membrane photobioreactors. However, membrane fouling is considered a main drawback that offsets the benefits of algal applications by heavily impacting the operation cost. Several fouling control strategies have been proposed, addressing aspects related to characteristics in the feed water and membranes, operational conditions, and biomass properties. However, the lack of understanding of the mechanisms behind algal biofouling and control challenges the development of cost-effective strategies needed for the long-term operation of membrane photobioreactors. This paper reviews the progress on algal membrane fouling and control strategies. Herein, we summarize information in the composition and characteristics of algal foulants, namely algal organic matter, cells, and transparent exopolymer particles; and review their dynamic responses to modifications in the feedwater, membrane surface, hydrodynamics, and cleaning methods. This review comparatively analyzes (i) efficiency in fouling control or mitigation, (ii) advantages and drawbacks, (iii) technological performance, and (iv) challenges and knowledge gaps. Ultimately, the article provides a primary reference of algal biofouling in membrane-based applications.

Hybrid TiO2 photocatalytic oxidation and ultrafiltration for humic acid removal and membrane fouling control

2011 ◽  
Vol 11 (3) ◽  
pp. 324-332 ◽  
Author(s):  
Hongwei Bai ◽  
Darren Delai Sun
Keyword(s):  
Humic Acid ◽  
Membrane Fouling ◽  
Photocatalytic Oxidation ◽  
Removal Rate ◽  
Optimal Choice ◽  
Feed Water ◽  
Permeate Flux ◽  
Hydrophobic Membrane ◽  
Fouling Control ◽  
And Control

Hybrid UV/TiO2 photocatalytic oxidation (PCO) and ultrafiltration (UF) process (PCO-UF) were used to remove humic acid (HA) and control membrane fouling. The PCO-UF process showed advantages in terms of higher removal rate of HA, higher permeate flux and less membrane fouling over UF alone and PCO alone on HA removal and membrane fouling control. Membrane material and pH of feed water were shown to be the influence on the performance of PCO-UF process. It was observed that higher pH of HA feed water and a hydrophobic membrane lead to better removal of HA with relatively higher permeate flux. The experimental results in this study demonstrated that 100 kDa ultraflic UF membrane and pH 9 of HA feed water would be the optimal choice for HA removal in the combined PCO-UF process.

scholarly journals Progress in development of Membrane Fouling Control for Microalgae Filtration: a Review

2021 ◽  
Vol 5 (1) ◽  
pp. 67
Author(s):  
Nik Nurul Ain Nabilah Razak ◽  
Muhammad Roil Bilad
Keyword(s):  
Membrane Fouling ◽  
Membrane Filtration ◽  
Membrane Technology ◽  
Production Costs ◽  
Process Efficiency ◽  
Future Research ◽  
Operational Parameters ◽  
Comprehensive Overview ◽  
Fouling Control ◽  
Microalgae Biomass

Microalgae biomass is an attractive feedstock for biofuels and other applications. Prior utilization the microalgae biomass must be harvested, a step that contributes largely to the overall energy and production costs. Membrane filtration is seen as a viable option for microalgae concentration. It is mainly attractive as primary step treating the diluted broth. However, its application is largely limited by membrane fouling that lowers overall process efficiency and productivity. This study provides an overview on the recent progress of the membrane technology particularly on technology to address the membrane fouling issue in microalgae filtration and upconcentration. Firstly, brief introduction of potential of microalgae biomass and membrane technology is provided. It followed by comprehensive overview of membrane fouling control approach. The membrane fouling control approaches are classified into optimization of operational parameters, membrane material development, hydrodynamic manipulation, improved module design and lastly module spacer development. Lastly, perspective on future research direction is also provided.

scholarly journals Review of New Approaches for Fouling Mitigation in Membrane Separation Processes in Water Treatment Applications

Separations ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Mervette El Batouti ◽  
Nouf F. Alharby ◽  
Mahmoud M. Elewa
Keyword(s):  
Membrane Fouling ◽  
New Technologies ◽  
Membrane Separation ◽  
Control Strategies ◽  
Membrane Surface ◽  
Membrane Distillation ◽  
Separation Processes ◽  
Term Operation ◽  
Fouling Control ◽  
Inorganic Matter

This review investigates antifouling agents used in the process of membrane separation (MS), in reverse osmosis (RO), ultrafiltration (UF), nanofiltration (NF), microfiltration (MF), membrane distillation (MD), and membrane bioreactors (MBR), and clarifies the fouling mechanism. Membrane fouling is an incomplete substance formed on the membrane surface, which will quickly reduce the permeation flux and damage the membrane. Foulant is colloidal matter: organic matter (humic acid, protein, carbohydrate, nano/microplastics), inorganic matter (clay such as potassium montmorillonite, silica salt, metal oxide, etc.), and biological matter (viruses, bacteria and microorganisms adhering to the surface of the membrane in the case of nutrients) The stability and performance of the tested nanometric membranes, as well as the mitigation of pollution assisted by electricity and the cleaning and repair of membranes, are reported. Physical, chemical, physico-chemical, and biological methods for cleaning membranes. Biologically induced biofilm dispersion effectively controls fouling. Dynamic changes in membrane foulants during long-term operation are critical to the development and implementation of fouling control methods. Membrane fouling control strategies show that improving membrane performance is not only the end goal, but new ideas and new technologies for membrane cleaning and repair need to be explored and developed in order to develop future applications.

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